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techtalk:ih:engmech07 [2022/04/03 22:19]
hippysmack [Oil Deflector / Separator Bushing Assembly (1957-1962)]
techtalk:ih:engmech07 [2023/12/20 18:58] (current)
hippysmack [L1984-1990 Breather Valve]
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-====== Timed Breather Valve (57-76) ======+====== Timed Breather Valve (1957-1976) ======
 \\ \\
 ===== Sub Documents ===== ===== Sub Documents =====
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 57-76 engines breath and scavenge oil from the same oil galley in the rear of the sump. \\ 57-76 engines breath and scavenge oil from the same oil galley in the rear of the sump. \\
-<​blockquote>​The shallow sump, timed breather system, comes from the aviation world of old. ((mrmom9r of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1204854&​page=4)) \\ +<​blockquote>​The shallow sump, timed breather system, comes from the aviation world of old. ((mrmom9r of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​122424-breather-diagrams/​page4?​t=1204854&​page=4)) \\ 
 Piston driven aircraft had to be able to evacuate the oil from the crankcase regardless of engine altitude and that system does that. \\ Piston driven aircraft had to be able to evacuate the oil from the crankcase regardless of engine altitude and that system does that. \\
 At the time Harley adapted that system they were copying the highest engine technology of the day. \\ At the time Harley adapted that system they were copying the highest engine technology of the day. \\
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 ===== 1956-1959 Breather Valve ===== ===== 1956-1959 Breather Valve =====
   * Breather timing and duration:   * Breather timing and duration:
-    * Opens 25° (ATDC) and Closes at (BDC). ((thefrenchowl of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2077939&​page=2))+    * Opens 25° (ATDC) and Closes at (BDC). ((thefrenchowl of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​200928-ih-crankcase-pressure-and-engine-breathing/​page2?​t=2077939&​page=2))
   * Duration - 155°   * Duration - 155°
   * 180° of vacuum from front (BDC) to front (TDC).   * 180° of vacuum from front (BDC) to front (TDC).
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   * Breather timing and duration:   * Breather timing and duration:
-    * Opens 25° (ATDC) and Closes at (BDC) ((thefrenchowl of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2077939&​page=2))+    * Opens 25° (ATDC) and Closes at (BDC) ((thefrenchowl of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​200928-ih-crankcase-pressure-and-engine-breathing/​page2?​t=2077939&​page=2))
   * Duration - 155°.   * Duration - 155°.
-  * Slot widths: ((chevelle of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=989934&​page=2))+  * Slot widths: ((chevelle of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​108113-breather-timing-early-sportster/​page2?​t=989934&​page=2))
     * Slot in pump body: .345"     * Slot in pump body: .345"
     * Slot in pump gear: .375" ​     * Slot in pump gear: .375" ​
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   * Breather timing and duration:   * Breather timing and duration:
-    * Opens 20°-25° (ATDC) and closes 85°-90° (ABDC). ((thefrenchowl of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2077939&​page=2))+    * Opens 20°-25° (ATDC) and closes 85°-90° (ABDC). ((thefrenchowl of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​200928-ih-crankcase-pressure-and-engine-breathing/​page2?​t=2077939&​page=2))
   * Duration - 245°.   * Duration - 245°.
- * Slot widths: ((chevelle of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=989934&​page=2))+ * Slot widths: ((chevelle of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​108113-breather-timing-early-sportster/​page2?​t=989934&​page=2))
     * Slot in pump body: .345"     * Slot in pump body: .345"
     * Slot in pump gear: .625"     * Slot in pump gear: .625"
     * 90° of vacuum from 90° (ABDC) to front (TDC).     * 90° of vacuum from 90° (ABDC) to front (TDC).
-===== Oil Deflector / Separator Bushing Assembly (1957-1962) =====+ 
 +===== Oil Deflector / Separator Bushing Assembly (1952-1962) =====
 AKA, (spring loaded top hat) \\ AKA, (spring loaded top hat) \\
  
-Oil deflector bushing consists of 2 pieces with the second being a brass oil seal insert "top hat". \\+1952-1962 K Models and Sportsters used a drive gear on the generator with an integral oil slinger (daisy wheel) on the end. \\ 
 +Oil gets slung back into the gearcase and air is sent thru the oil deflector bushing and out the cover by way of the breather tube. \\ 
 +See more on the generator gear at the bottom of this page. \\ 
 +  
 +The oil deflector bushing consists of 2 pieces with the second being a brass oil seal insert "top hat". \\
 A spring (25287-37) sits under the top hat in the bushing bore. \\ A spring (25287-37) sits under the top hat in the bushing bore. \\
 The assembly is pressed into the front of the cover with the brass being spring loaded against the generator "daisy cutter"​ gear. \\ The assembly is pressed into the front of the cover with the brass being spring loaded against the generator "daisy cutter"​ gear. \\
 The brass part is an oil seal and the daisy cutter separates air from oil sending the air into the deflector bushing then out the breather tube. \\ The brass part is an oil seal and the daisy cutter separates air from oil sending the air into the deflector bushing then out the breather tube. \\
 The brass top hat has a spring under pushing toward the generator and the top hat has limited action keeping it inside the bushing. \\ The brass top hat has a spring under pushing toward the generator and the top hat has limited action keeping it inside the bushing. \\
-Looking at the brass part, you can see how the spring catches on the inward bent tabs. ((Dr Dick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1861965)) \\+Looking at the brass part, you can see how the spring catches on the inward bent tabs. ((Dr Dick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​173424-oil-separator-question-any-help-appreciated?​t=1861965)) \\
 The brass stays keyed to the steel at full spring compression and "​plunges"​ in and out under the spring pressure. \\ The brass stays keyed to the steel at full spring compression and "​plunges"​ in and out under the spring pressure. \\
 The outward bent tangs do 2 things. \\ The outward bent tangs do 2 things. \\
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 The spring should have free action and be fully extended in the gearcase cover. \\ The spring should have free action and be fully extended in the gearcase cover. \\
  
-{{:​techtalk:​ih:​engmech:​1952-1962_k_model-sportster_breather_oil_separator_bushing_assembly_25265-52_by_jrsvintageharley1990.jpg?​direct&​300|}} ((photo courtesy of Ebay seller, jrsvintageharley1990. [[https://​www.ebay.com/​str/​jrsvintageharleyparts?​_trksid=p2047675.l2563|Link to Ebay Store]] ​ )) {{:​techtalk:​ih:​engmech:​breather_bushing_pic3_by_62_ironhead.jpg?​direct&​300|}} ((photo by 62 Ironhead ​of the XLFORUM http://xlforum.net/forums/showthread.php?t=1861965)) {{:​techtalk:​ih:​engmech:​breather_bushing_pic5_by_62_ironhead.jpg?​direct&300|}} ((photo by 62 Ironhead of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=1861965)) \\+{{:​techtalk:​ih:​engmech:​1952-1962_k_model-sportster_breather_oil_separator_bushing_assembly_25265-52_by_jrsvintageharley1990.jpg?​direct&​300|}} ((photo courtesy of Ebay seller, jrsvintageharley1990. [[https://​www.ebay.com/​str/​jrsvintageharleyparts?​_trksid=p2047675.l2563|Link to Ebay Store]] ​ )) {{:​techtalk:​ih:​engmech:​1952-1962_k_model-sportster_oil_deflector_bushing_installed_by_panknuckpartsandtreasures.jpg?​direct&​300|}} ((photos courtesy ​of Ebay seller, panknuckpartsandtreasures. [[https://www.ebay.com/sch/panknuckpartsandtreasures/​m.html?_nkw=&_armrs=1&​_ipg=&​_from=|Link to Ebay Store]] ​)) \\
  
 +===== Oil Separator Deflector (1963-1978) =====
 +
 +{{:​techtalk:​ih:​engmech:​1963-1978_sportster_cam_cover_oil_deflector_25265-63_by_jrsvintageharley1990.jpg?​direct&​300|}} ((photos courtesy of Ebay seller, jrsvintageharley1990. [[https://​www.ebay.com/​str/​jrsvintageharleyparts?​_trksid=p2047675.l2563|Link to Ebay Store]] ​ )) \\
 ====== One Way Breather Valve (77-85) ====== ====== One Way Breather Valve (77-85) ======
-The one way breather style system is more like a car PCV system. ((mrmom9r of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1204854&​page=4)) Unlike an auto PCV, a Sportster has a faster acting type one way valve. \\ +The one way breather style system is more like a car PCV system. ((mrmom9r of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​122424-breather-diagrams/​page4?​t=1204854&​page=4)) Unlike an auto PCV, a Sportster has a faster acting type one way valve. \\ 
 A deep (dry) sump was added to 77> casings and the scavenge side of the oil pump pulls the oil from the scavenge port in the rear of the sump area. \\ A deep (dry) sump was added to 77> casings and the scavenge side of the oil pump pulls the oil from the scavenge port in the rear of the sump area. \\
 Holes were added between the crankcase and the gearcase wall (much the way your car's crankcase is vented out the top thru the valve covers) \\ Holes were added between the crankcase and the gearcase wall (much the way your car's crankcase is vented out the top thru the valve covers) \\
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 So, 77-up engines breath and scavenge oil from separate places. \\ So, 77-up engines breath and scavenge oil from separate places. \\
  
-However, crankcase ventilation works a little differently on these motors than a Chevy. ((aswracing of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1468237)) \\+However, crankcase ventilation works a little differently on these motors than a Chevy. ((aswracing of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-motor-top-end/​135598-crankcase-pressure?​t=1468237)) \\
 What you see on cars is an inlet, generally coming from the air filter, into the motor. Then an outlet, regulated by a PCV valve, going into the intake manifold. \\ What you see on cars is an inlet, generally coming from the air filter, into the motor. Then an outlet, regulated by a PCV valve, going into the intake manifold. \\
 So it's designed to flow a little air through the system. \\ So it's designed to flow a little air through the system. \\
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   * The complete assembly is part# (24633-77). The valve itself is (24634-77).   * The complete assembly is part# (24633-77). The valve itself is (24634-77).
-  * Thread size at cam cover is 5/​8"​-11. ((ericfreeman of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1003815)) +  * Thread size at cam cover is 5/​8"​-11. ((ericfreeman of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​108888-cam-cover-vent-thread-size?​t=1003815)) 
-  * The slang term "​FooFoo"​ comes from the annoying sound that it makes when it gets clogged up with oil residue. ((IronMick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1332902&​page=3)) +  * The slang term "​FooFoo"​ comes from the annoying sound that it makes when it gets clogged up with oil residue. ((IronMick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​128453-crankcase-breathing-cycle/​page3?​t=1332902&​page=3)) 
-  * The engine breather (or crankcase vent) is to allow air out of the lower crankcase, but not in, as the pistons rise and fall. ((Hopper of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=518948)) \\ Without some kind of controlled breather, the lower end would become a 1,000cc air compressor, robbing the engine of several horsepower. \\ Old time tuners like Jerry Branch, Tom Sifton and Dick O’Brien paid much attention to the engine breather. \\ They knew it could give them extra horsepower if set up right.+  * The engine breather (or crankcase vent) is to allow air out of the lower crankcase, but not in, as the pistons rise and fall. ((Hopper of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​74149-engine-breather-101-crankcase-vent-101?t=518948)) \\ Without some kind of controlled breather, the lower end would become a 1,000cc air compressor, robbing the engine of several horsepower. \\ Old time tuners like Jerry Branch, Tom Sifton and Dick O’Brien paid much attention to the engine breather. \\ They knew it could give them extra horsepower if set up right.
   *  One thing not to do with an engine breather is to simply plumb a hose to the crankcase without some kind of one-way valve or timed breather valve. \\ It is commonly done, but it wastes power and is not good for your engine.   *  One thing not to do with an engine breather is to simply plumb a hose to the crankcase without some kind of one-way valve or timed breather valve. \\ It is commonly done, but it wastes power and is not good for your engine.
  
-WHERE IS IT? ((Hopper of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=518948)) \\+WHERE IS IT? ((Hopper of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​74149-engine-breather-101-crankcase-vent-101?t=518948)) \\
  
   * **1977-78 only** ((Hopper)) ((HD Service Bulletin #M-708 dated December 1, 1976)) \\   * **1977-78 only** ((Hopper)) ((HD Service Bulletin #M-708 dated December 1, 1976)) \\
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       * It's a possible option for the 77-78 foofoo valve  to be replaced with an external breather valve. \\ If you want to go this route, remove the internal valve as it will also change crankcase pressure with 2 valves in line. \\ Then, you might want to consider installing something like the external Krankvent or others. \\ [[techtalk:​ref:​engmech05d|Click here]] to see the Converting Head Breathers to Cam Chest Breather page in the Sportsterpedia. \\ That page is for an Evo conversion to cam chest breathing but the Krankvent and plumbing is shown. \\ You can also review this page in the Sportsterpedia ​ [[techtalk:​ref:​engmech05|Breather Venting / Relocation]] (especially the sub documents at the top of the page)       * It's a possible option for the 77-78 foofoo valve  to be replaced with an external breather valve. \\ If you want to go this route, remove the internal valve as it will also change crankcase pressure with 2 valves in line. \\ Then, you might want to consider installing something like the external Krankvent or others. \\ [[techtalk:​ref:​engmech05d|Click here]] to see the Converting Head Breathers to Cam Chest Breather page in the Sportsterpedia. \\ That page is for an Evo conversion to cam chest breathing but the Krankvent and plumbing is shown. \\ You can also review this page in the Sportsterpedia ​ [[techtalk:​ref:​engmech05|Breather Venting / Relocation]] (especially the sub documents at the top of the page)
  
-| 77 Cam Cover Breather Compartment. ((photo by joynny77 ​of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=610444&​page=4)) |  See "​Dissecting the 77-78 Breather (foo-foo) Valve (24634-77)"​ for more pics and dims. ((photos by Hippysmack)) ​ ||+| 77 Cam Cover Breather Compartment. ((photo by jonny77 ​of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​82366-foo-foo-gone-or-was-it-ever-there-do-i-need-it/​page3?​t=610444&​page=4)) |  See "​Dissecting the 77-78 Breather (foo-foo) Valve (24634-77)"​ for more pics and dims. ((photos by Hippysmack)) ​ ||
 |{{:​techtalk:​ih:​engmech:​1977_crankcase_breather_compartment_by_johnny77.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​77-78_xl_foofoo_valve_24634-77_pic1_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​77-78_xl_foofoo_valve_24634-77_pic12_by_hippysmack.jpg?​direct&​300|}}| |{{:​techtalk:​ih:​engmech:​1977_crankcase_breather_compartment_by_johnny77.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​77-78_xl_foofoo_valve_24634-77_pic1_by_hippysmack.jpg?​direct&​300|}}|{{:​techtalk:​ref:​engmech:​77-78_xl_foofoo_valve_24634-77_pic12_by_hippysmack.jpg?​direct&​300|}}|
  
-|  77-78 Crankcase Breather Valve ((photo by Hopper of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=1960632))  |||+|  77-78 Crankcase Breather Valve ((photo by Hopper of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​74149-engine-breather-101-crankcase-vent-101#​post1960632))  |||
 |{{:​techtalk:​ih:​oil:​77-78_ext_foo_foo_valve_1_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ih:​oil:​77-78_ext_foo_foo_valve_2_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ih:​oil:​77-78_ext_foo_foo_valve_3_by_hopper.jpg?​direct&​300|}}| |{{:​techtalk:​ih:​oil:​77-78_ext_foo_foo_valve_1_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ih:​oil:​77-78_ext_foo_foo_valve_2_by_hopper.jpg?​direct&​300|}}|{{:​techtalk:​ih:​oil:​77-78_ext_foo_foo_valve_3_by_hopper.jpg?​direct&​300|}}|
  
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     * A 45 ° hose barb fitting was installed to connect a length of hose that leads back along the frame. \\ This way the oil mist gets directed out back and doesn'​t collect along the frame and engine.     * A 45 ° hose barb fitting was installed to connect a length of hose that leads back along the frame. \\ This way the oil mist gets directed out back and doesn'​t collect along the frame and engine.
  
-|  Stock tube removed, fitted with 1/8" 45 deg barb fitting. ((photos by ericfreeman of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1928882)) ​ ||+|  Stock tube removed, fitted with 1/8" 45 deg barb fitting. ((photos by ericfreeman of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​179539-foo-foo-breather-fitting-alternatives?​t=1928882)) ​ ||
 |{{:​techtalk:​ih:​engmech:​foofoo_vent_mod_pic1_by_ericfreeman.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engmech:​foofoo_vent_mod_pic2_by_ericfreeman.jpg?​direct&​300|}}| |{{:​techtalk:​ih:​engmech:​foofoo_vent_mod_pic1_by_ericfreeman.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engmech:​foofoo_vent_mod_pic2_by_ericfreeman.jpg?​direct&​300|}}|
  
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   * **Reed Valve Assembly (26909-79)**.   * **Reed Valve Assembly (26909-79)**.
-    * Breather vent fitting thread size at the cam cover is 1/8" NPT. ((IronMick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1003815))+    * Breather vent fitting thread size at the cam cover is 1/8" NPT. ((IronMick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​108888-cam-cover-vent-thread-size?​t=1003815))
     * The external foo-foo valve and the six-inch metal vent tube at the front of the timing cover were done away with. \\ Instead, a one-way foo-foo valve was built inside the timing cover. \\ A rubber breather hose then ran from the generator drive area of the timing cover, at the 10 o’clock position. \\ It connected to the stock air filter so that any oil mist was fed back through the engine, making the EPA pollutocrats more happier. \\ (than they were with the idea of engine oil spraying out into the atmosphere) \\ The generator had a (1-5/​8"​ O.D.) oil separator washer on the end of the armature shaft. ((HD Service Bulletin #M-848 dated April 9, 1982))     * The external foo-foo valve and the six-inch metal vent tube at the front of the timing cover were done away with. \\ Instead, a one-way foo-foo valve was built inside the timing cover. \\ A rubber breather hose then ran from the generator drive area of the timing cover, at the 10 o’clock position. \\ It connected to the stock air filter so that any oil mist was fed back through the engine, making the EPA pollutocrats more happier. \\ (than they were with the idea of engine oil spraying out into the atmosphere) \\ The generator had a (1-5/​8"​ O.D.) oil separator washer on the end of the armature shaft. ((HD Service Bulletin #M-848 dated April 9, 1982))
-    * The breather valve is a simple reed valve with a flap made of spring steel over a hole. \\ Unless it's visibly damaged, there'​s no reason to mess with it. ((BigMek of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=5843330)) \\ If it stops up, you can try and spray some WD-40 in the hole to clear it.+    * The breather valve is a simple reed valve with a flap made of spring steel over a hole. \\ Unless it's visibly damaged, there'​s no reason to mess with it. ((BigMek of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​200501-top-end-rebuild#​post4430374)) \\ If it stops up, you can try and spray some WD-40 in the hole to clear it.
   * **Removal**:​   * **Removal**:​
-    * The reed cam be removed with a standard bushing / bearing puller ​ with a 5/8".+    * The reed can be removed with a standard bushing / bearing puller ​ with a 5/8".
   * **Replacement options / mods**:   * **Replacement options / mods**:
     * In L1982, a new style crankcase breather valve was used in production. \\ The breather valve kit (26909-79A),​ which is functionally more durable and quieter than the early style reed valve, will fit 1979-E82 models. \\ The late style breather valve incorporates a rubber umbrella valve attached to the base plate along with a larger diameter oil slinger washer. \\ The oil slinger washer is bigger (1-3/​4"​ OD). \\ These parts, used together, will replace the early style reed valve assembly and smaller diameter oil separator washer. \\     * In L1982, a new style crankcase breather valve was used in production. \\ The breather valve kit (26909-79A),​ which is functionally more durable and quieter than the early style reed valve, will fit 1979-E82 models. \\ The late style breather valve incorporates a rubber umbrella valve attached to the base plate along with a larger diameter oil slinger washer. \\ The oil slinger washer is bigger (1-3/​4"​ OD). \\ These parts, used together, will replace the early style reed valve assembly and smaller diameter oil separator washer. \\
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     * [[techtalk:​ref:​engmech05i#​refengine_mechanicals_-_sub-05i|Click here]] to see the page on Adding a Secondary Vent Hose at the 6:00 Position. \\ This mod has been done with agreeable results to improve breathing.     * [[techtalk:​ref:​engmech05i#​refengine_mechanicals_-_sub-05i|Click here]] to see the page on Adding a Secondary Vent Hose at the 6:00 Position. \\ This mod has been done with agreeable results to improve breathing.
  
-Here's the reed valve and the back side. \\ +Here's the reed valve as installed. \\ 
-{{:​techtalk:​ih:​engmech:​79_breather_valve_by_tobybott.jpg?​direct&​350|}} ((photo by tobybott of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?p=982127&​highlight=breather#​post982127)) {{:​techtalk:​ih:​engmech:​reed_valve_by_lodkolv.jpg?​direct&​300|}} ((photo ​by lodkolv ​of the XLFORUM http://xlforum.net/forums/showthread.php?t=113861&highlight=breather&​page=2)) \\+{{:​techtalk:​ih:​engmech:​79_breather_valve_by_tobybott.jpg?​direct&​350|}} ((photo by tobybott of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​42665-79-ironhead-breather-check-valve?​highlight=breather#​post877147)) \\ 
 + 
 +Here is the reed valve assembly ​ front and back side. \\ 
 +{{:​techtalk:​ih:​engmech:​1979-e1982_sportster_reed_type_breather_valve_26909-79_by_bikersnos_pic2.jpg?​direct&​300|}} ((photo ​courtesy ​of BIKERSNOS.com. [[https://www.ebay.com/str/bikersnos?_trksid=p2047675.m3561.l2563|Link to Ebay Store]] ))  
 +{{:​techtalk:​ih:​engmech:​1979-e1982_sportster_reed_type_breather_valve_26909-79_by_bikersnos_pic1.jpg?​direct&300|}} ((photo courtesy of BIKERSNOS.com. [[https://​www.ebay.com/​str/​bikersnos?​_trksid=p2047675.m3561.l2563|Link to Ebay Store]] ​)) \\ 
 +\\ 
 + 
 +=== L1982 Upgrade ===
  
 (Left) - E82 cover with the breather removed showing compartment below. ((photo by wlkilmer of the XLFORUM)) \\ (Left) - E82 cover with the breather removed showing compartment below. ((photo by wlkilmer of the XLFORUM)) \\
-(Right) - 81 Cam Cover Breather Compartment (with the rubber umbrella valve upgrade). ((photo by joynny77 ​of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=610444&​page=4)) \\+(Right) - 81 Cam Cover Breather Compartment (with the rubber umbrella valve upgrade). ((photo by jonny77 ​of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​82366-foo-foo-gone-or-was-it-ever-there-do-i-need-it/​page4?​t=610444&​page=4)) \\
 {{:​techtalk:​ih:​engmech:​1982_breather_compartment_oil_drainback_hole_by_wlkilmer.jpg?​direct&​300|}} {{:​techtalk:​ih:​engmech:​1981_crankcase_breather_compartment_w_update_rubber_valve_by_johnny77.jpg?​direct&​300|}} \\ {{:​techtalk:​ih:​engmech:​1982_breather_compartment_oil_drainback_hole_by_wlkilmer.jpg?​direct&​300|}} {{:​techtalk:​ih:​engmech:​1981_crankcase_breather_compartment_w_update_rubber_valve_by_johnny77.jpg?​direct&​300|}} \\
  
Line 178: Line 193:
  
 {{:​techtalk:​ih:​engmech:​83_cam_cover_breather_valve_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack)) \\ {{:​techtalk:​ih:​engmech:​83_cam_cover_breather_valve_by_hippysmack.jpg?​direct&​300|}} ((photo by Hippysmack)) \\
 +
 ===== L1984-1990 Breather Valve ===== ===== L1984-1990 Breather Valve =====
  
Line 187: Line 203:
 The pic on the right is of an 85 cam cover with the foofoo valve (baffle tube) off to the left of it. \\ The pic on the right is of an 85 cam cover with the foofoo valve (baffle tube) off to the left of it. \\
  
-{{:​techtalk:​ih:​engmech:​85_foofoo_2_by_spamer80.jpg?​direct&​300|}} ((photo by spammer80 of the XLFORUM)) ​ {{:​techtalk:​ih:​oil:​85_cam_cover_1_by_billeuze.jpg?​direct&​300|}} ((photo by billeuze of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1103082))+{{:​techtalk:​ih:​engmech:​85_foofoo_2_by_spamer80.jpg?​direct&​300|}} ((photo by spammer80 of the XLFORUM)) ​ {{:​techtalk:​ih:​oil:​85_cam_cover_1_by_billeuze.jpg?​direct&​300|}} ((photo by billeuze of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​115252-cam-fitment-question-on-ih-help-me-out-plz?​t=1103082))
  
-**Umbrella check valve**: ((Gary E of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2071387&​page=8)) \\+**Umbrella check valve**: ((Gary E of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​195092-rigid-evo-oil-check-ball-spring/​page8?​t=2071387&​page=8)) \\
 Outside diameter: \\ Outside diameter: \\
 26856-82 - 1.25" \\ 26856-82 - 1.25" \\
-Edge thickness (1/8" in average): ((Gary E of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2071387&​page=8)) \\+Edge thickness (1/8" in average): ((Gary E of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​195092-rigid-evo-oil-check-ball-spring/​page8?​t=2071387&​page=8)) \\
 26856-82 - 0.036" \\ 26856-82 - 0.036" \\
  
Line 200: Line 216:
  
 |{{:​techtalk:​evo:​oil:​breather_baffle_tube_by_gary_e.jpg?​direct&​300|}}|{{:​techtalk:​evo:​oil:​86_crankcase_vent_3_by_norsexl.jpg?​direct&​300|}}| |{{:​techtalk:​evo:​oil:​breather_baffle_tube_by_gary_e.jpg?​direct&​300|}}|{{:​techtalk:​evo:​oil:​86_crankcase_vent_3_by_norsexl.jpg?​direct&​300|}}|
-|  Breather Baffle Tube (26917-84) ((photo by Gary E of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2071387&​page=8http:​//xlforum.net/forums/showthread.php?​t=2071387&​page=8)) ​ |  Cap, tube and umbrella ((photo by norseXL of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=72099&​page=25)) ​ |+|  Breather Baffle Tube (26917-84) ((photo by Gary E of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/sportster-motorcycle-motor-engine/sportster-motorcycle-bottom-end/195092-rigid-evo-oil-check-ball-spring/page8?​t=2071387&​page=8)) ​ |  Cap, tube and umbrella ((photo by norseXL of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-motor-engine/​sportster-motorcycle-bottom-end/​36799-installing-the-ultimate-crankcase-vent-%C2%93how-to%C2%94/​page25?​t=72099&​page=25)) ​ |
  
 ===== 1979-1990 Breather Valve Replacement Options / Mods ===== ===== 1979-1990 Breather Valve Replacement Options / Mods =====
Line 217: Line 233:
 It spins oil away from the breather hole by centrifugal force and separates the oil mist in suspension with the exhausting air. \\ It spins oil away from the breather hole by centrifugal force and separates the oil mist in suspension with the exhausting air. \\
  
-  * **1952-1962 K/​KH/​Sportsters** used a drive gear with an integral oil slinger (daisy wheel) on the end and pinned to the generator shaft. \\ It looks like a gear with a tinker toy connector glued on the end. It's a lathe machined affair combined with a spring loaded sleeve in the cover. \\ Just get rid of the timing cover sliding bush/spring if you want to upgrade to the big washer instead. ((thefrenchowl of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=2195143#post2195143)) \\ The sliding bushing assembly makes the early slinger works as a "​labyrinth"​ since the air has to travel through its center to get out. \\ That's why it's a better set up than the simpler washer setup. It doesn'​t allow for any oil to escape except if your engine is totally wetsumped. \\ But the early slinger will work without the sliding bushing, just not as good. \\ And you can't use the sliding bushing with the washer setup.+  * **1952-1962 K/​KH/​Sportsters** used a drive gear with an integral oil slinger (daisy wheel) on the end and pinned to the generator shaft. \\ It looks like a gear with a tinker toy connector glued on the end. It's a lathe machined affair combined with a spring loaded sleeve in the cover. \\ Just get rid of the timing cover sliding bush/spring if you want to upgrade to the big washer instead. ((thefrenchowl of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​82784-1963-generator-oil-slinger#post1705627)) \\ The sliding bushing assembly makes the early slinger works as a "​labyrinth"​ since the air has to travel through its center to get out. \\ That's why it's a better set up than the simpler washer setup. It doesn'​t allow for any oil to escape except if your engine is totally wetsumped. \\ But the early slinger will work without the sliding bushing, just not as good. \\ And you can't use the sliding bushing with the washer setup.
     * **K and KH Models** used gear (31071-52). \\     * **K and KH Models** used gear (31071-52). \\
     * **1957 XL Sportster** used gear (31071-52A) with no nut or washer.     * **1957 XL Sportster** used gear (31071-52A) with no nut or washer.
Line 225: Line 241:
   * **1982-E1984 Sportsters** used the same gear (31073-63A) with a 1-3/4" slinger washer (31066-82) to accommodate the larger crankcase breather valve.   * **1982-E1984 Sportsters** used the same gear (31073-63A) with a 1-3/4" slinger washer (31066-82) to accommodate the larger crankcase breather valve.
  
-To inspect or replace the slinger washer, remove the two bolts from the cam cover that hold the generator. ((randy3934 of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1651226&​highlight=slinger&​page=2)) \\+To inspect or replace the slinger washer, remove the two bolts from the cam cover that hold the generator. ((randy3934 of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​153442-breather-spitting-too-much-oil/​page2?​t=1651226&​highlight=slinger&​page=2)) \\
 Remove the wires from the generator and with a little fiddeling around, the generator will come out. The washer is on the end of the armature. \\ Remove the wires from the generator and with a little fiddeling around, the generator will come out. The washer is on the end of the armature. \\
-Make sure to put a new grade 8 nylock nut on if you remove the old one. They should only be used once or they lose their grip in that hot, oily environment. ((Hopper of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1651226&​highlight=slinger&​page=3)) \\+Make sure to put a new grade 8 nylock nut on if you remove the old one. They should only be used once or they lose their grip in that hot, oily environment. ((Hopper of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​153442-breather-spitting-too-much-oil/​page3?​t=1651226&​highlight=slinger&​page=3)) \\
  
 Check the oil separator bushing to bore fit in the cover. It should be a light press fit. \\ Check the oil separator bushing to bore fit in the cover. It should be a light press fit. \\
-If it is loose, you can probably remove it, clean up the boss with brake cleaner and reinstall the bushing with Loctite or epoxy. ((shovithead of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1651226&​highlight=slinger&​page=3)) \\+If it is loose, you can probably remove it, clean up the boss with brake cleaner and reinstall the bushing with Loctite or epoxy. ((shovithead of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​153442-breather-spitting-too-much-oil/​page3?​t=1651226&​highlight=slinger&​page=3)) \\
  
-|1952-1956 K/KH or 1957 XL Sportster (pinned) \\ Generator Drive Gear / Oil Slinger ((photo courtesy of Ebay seller, JDVintagellc. [[https://​www.ebay.com/​str/​jdvintagellc?​_trksid=p2047675.l2563|Link to Ebay Store]] ))|1958-1962 Sportster (threaded) \\ Generator Gear / Oil Slinger (31071-58) ((photo by Dr Dick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=5100777#post5100777))|1963-Later Oil Slinger Washer (31067-63) ((photo by papphammar of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=495298))|+|1952-1956 K/KH or 1957 XL Sportster (pinned) \\ Generator Drive Gear / Oil Slinger ((photo courtesy of Ebay seller, JDVintagellc. [[https://​www.ebay.com/​str/​jdvintagellc?​_trksid=p2047675.l2563|Link to Ebay Store]] ))|1958-1962 Sportster (threaded) \\ Generator Gear / Oil Slinger (31071-58) ((photo by Dr Dick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​173424-oil-separator-question-any-help-appreciated#post3723151))|1963-Later Oil Slinger Washer (31067-63) ((photo by papphammar of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72120-oil-deflector?​t=495298))|
 |{{:​techtalk:​ih:​elec:​generator_drive_gear_k-kh_or_xl_pic2_by_j-dvintage.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engmech:​generator_drive_gear_31071-58_by_dr_dick.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engmech:​oil_slinger_on_76_xlch_by_papphammar.jpg?​direct&​300|}}| |{{:​techtalk:​ih:​elec:​generator_drive_gear_k-kh_or_xl_pic2_by_j-dvintage.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engmech:​generator_drive_gear_31071-58_by_dr_dick.jpg?​direct&​300|}}|{{:​techtalk:​ih:​engmech:​oil_slinger_on_76_xlch_by_papphammar.jpg?​direct&​300|}}|