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techtalk:ref:carb06 [2021/01/21 14:41] ixl2relax |
techtalk:ref:carb06 [2024/01/11 23:22] (current) hippysmack |
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| See also [[techtalk:ref:engmech05#breather_vent_relocation|Breather Vent Relocation]] in the REF section of the Sportsterpedia. \\ | See also [[techtalk:ref:engmech05#breather_vent_relocation|Breather Vent Relocation]] in the REF section of the Sportsterpedia. \\ | ||
| - | Some air cleaners are not set up to allow for the breather bolts into them and are only held on by the small front bolts. ((Shu of the XLFORUM http://xlforum.net/forums/showthread.php?t=146084&page=11)) \\ | + | Some air cleaners are not set up to allow for the breather bolts into them and are only held on by the small front bolts. ((Shu of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/44522-show-me-your-non-stock-breather-systems/page11?t=146084&page=11)) \\ |
| For these breathers you would need to get a head breather kit and carb support bracket. \\ | For these breathers you would need to get a head breather kit and carb support bracket. \\ | ||
| The breather kit routes the head vents to the ground (or atmosphere) while the carb support bracket keeps the carb in the intake. \\ | The breather kit routes the head vents to the ground (or atmosphere) while the carb support bracket keeps the carb in the intake. \\ | ||
| \\ | \\ | ||
| - | Below is a breather vent re-direction on an EFI model. ((jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) \\ | + | Below is a breather vent re-direction on an EFI model. ((jcmellis of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/120790-oil-drip-from-air-cleaner-fixed?t=1179974)) \\ |
| A small amount of crankcase oil was dripping into the A/C on a Figure Machine/Engineering air cleaner assembly. \\ | A small amount of crankcase oil was dripping into the A/C on a Figure Machine/Engineering air cleaner assembly. \\ | ||
| This air cleaner uses the stock Harley-Davidson breather tubes. \\ | This air cleaner uses the stock Harley-Davidson breather tubes. \\ | ||
| Line 33: | Line 33: | ||
| Once trimmed to size, the hoses are positioned at the mouth of the throttle body. \\ | Once trimmed to size, the hoses are positioned at the mouth of the throttle body. \\ | ||
| - | {{:techtalk:ref:carb:hd_breather_mod_1_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) {{:techtalk:ref:carb:hd_breather_mod_2_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM http://xlforum.net/forums/showthread.php?t=1179974)) | + | {{:techtalk:ref:carb:hd_breather_mod_1_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/120790-oil-drip-from-air-cleaner-fixed?t=1179974)) {{:techtalk:ref:carb:hd_breather_mod_2_by_jcmellis.jpg?direct&300|}} ((photo by jcmellis of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/120790-oil-drip-from-air-cleaner-fixed?t=1179974)) |
| ===== Big Sucker w/External Breather ===== | ===== Big Sucker w/External Breather ===== | ||
| + | {{:techtalk:ref:carb:bigsucker-extbreathermod-dodgenbullets.jpg?600|}} | ||
| - | See XLForum Thread: http://xlforum.net/forums/showthread.php?t=34956 - Post#17 | + | **How to modify the Big Sucker to vent to the atmosphere.**\\ |
| + | https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/21180-poll-big-sucker-owners-plz-respond (There are a number of mods listed in this thread)\\ | ||
| + | Commentary Posted by Dodgenbullets (See Post #17 & #19)\\ | ||
| - | How to modify the BigSucker to vent to the atmoshere. | + | After playing with different ideas, I found an easy fix for the Big Sucker intake. Your EVO will vent 100% of the crank case pressure to the atmosphere. IMO, the 1\16 hole in your stock breather bolts is not sufficient. Due to restrictor bushings in the Big Sucker, it isn't any better. |
| - | http://xlforum.net/forums/showthread.php?t=34956 | + | |
| - | Commentary Posted by Dodgenbullets (See Post #17 & #19) | + | |
| - | After playing with different ideas, I found an easy fix for the Bigsucker intake. Your EVO will vent 100% of the crank case pressure to the atmosphere. IMO, the 1\16 hole in your stock breather bolts is not sufficient. Due to restrictor bushings in the BigSucker, it isn't any better. | + | I was picking up some fuel line at an indy. I asked for some hose clamps and he opened a drawer with all kinds of neat looking stuff most call misc. hardware. There was various banjos and breathers. After blowing 2 sets of rocker cover gaskets and repeatedly spraying my slide with gumout I had it. First thought was to drill holes in the BS and put bleeder screws in the passages. Next was to use shortened stock bolts with vacuum lines in them. I remembered the bolts in the drawer and said, now why didn't I think of that sooner. It works perfect. |
| - | I was picking up some fuel line at an indie. I aked for some hose clamps and he opened a drawer with all kinds of neat looking stuff most call misc. hardware. There was various banjos and breathers. After blowing 2 sets of rocker cover gaskets and repeatedly spraying my slide with gumout I had it. First thought was to drill holes in the BS and put bleeder screws in the passages. Next was to use shortened stock bolts with vacume line.in them. I remembered the bolts in the drawer and said, now why didn't I think of that sooner. It works perfect. | + | After doing this mod, even my bad rocker cover gaskets stopped leaking. One reason why I feel that crank case pressure is not fully expelled with the Big Sucker. Ness is only doing what HD is as far as the size of the breather holes. When Ness first introduced this intake you had to put the restrictor bushings in the banjo bolts your self. If I knew any better I wouldn't have. |
| - | + | ||
| - | After doing this mod, even my bad rocker cover gaskets stopped leaking. One reason why I feel that crank case pressure is not fully expelled with the BigSucker. Ness is only doing what HD is as far as the size of the breather holes. When Ness first introduced this intake you had to put the restrictor bushings in the banjo bolts your self. If I knew any better I wouldn't have. | + | |
| The Mod: | The Mod: | ||
| - | For this mod you need HD# 3577 (2). These are breather bolts for early EVO motors (not banjos) and cost about $3.50 each. Next, is part# 24922-93. These are the boots that will slip over those bolts. 5/16 OD vacume line, a Tee fitting and 5 fuel injection clamps. NAPA auto parts is your best bet for non HD parts. The boots are pre-bent for another application. You need to snip them leaving an inch of the tubing. | + | For this mod you need HD# 3577 (2). These are breather bolts for early EVO motors (not banjos) and cost about $3.50 each. Next, is part# 24922-93. These are the boots that will slip over those bolts. 5/16 OD vacuum line, a Tee fitting and 5 fuel injection clamps. NAPA auto parts is your best bet for non HD parts. The boots are pre-bent for another application. You need to snip them leaving an inch of the tubing. |
| - | Remove the banjo bolts 1 at a time and thread in its place part# 3577. Place one of the original O rings on each bolt. The side benifit here is these bolts have allen heads. No more trying to find a thin wrench that fits between the backing plate and it's mounting sleeve . While your at it, take those O rings to Ace hardware and get new ones. I went with O rings that were slightly thicker, and a slightly larger OD diameter, same ID of course. The new bolts will plug off the old oil vent passages in the BigSucker so nothing needs to be done here. | + | Remove the banjo bolts 1 at a time and thread in its place part# 3577. Place one of the original O rings on each bolt. The side benefit here is these bolts have Allen heads. No more trying to find a thin wrench that fits between the backing plate and it's mounting sleeve . While your at it, take those O rings to Ace hardware and get new ones. I went with O rings that were slightly thicker, and a slightly larger OD diameter, same ID of course. The new bolts will plug off the old oil vent passages in the Big Sucker so nothing needs to be done here. |
| - | Press the boots on the new breather bolts. You can see in the pics the air filter will keep them in place. | + | Press the boots on the new breather bolts. You can see in the pics the air filter will keep them in place. Place a fuel injector clamp on each one. Now slip a 5-1/2 inch piece of 5/16 vacuum line inside the one inch tail you left on each boot. Clamp it. |
| - | place a fuel injector clamp on each one. Now slip a 5 1/2 inch piece of 5/16 vacume line inside the one inch tail you left on each boot. Clamp it. | + | |
| - | Now point the front breather hose toward your front axle and the back one to the rear axle. Have them meet in the Tee fitting under your float bowl. Run the single line off the Tee along side the carberator overflow line. | + | Now point the front breather hose toward your front axle and the back one to the rear axle. Have them meet in the Tee fitting under your float bowl. Run the single line off the Tee along side the carburetor overflow line. |
| - | + | ||
| - | You don't need to run a filter on this or any other breather. That is if your vent line is 12 inches or longer . It's just not necescary. Keep in mind your stock breather holes were just 1/16 of an inch. This is a huge improvement. | + | |
| - | + | ||
| - | Here's an opportunity to paint the backing plate. Mask off the Air cleaner side and the area on the back where the carb gasket sits. I used HD areosal part# 98606DH the same color as my motor. When your done this will look good . No horseshoe, hoses, or filters in sight. It looks very much like a factory set up. | + | |
| - | + | ||
| - | A variety of air filters and covers can now be used. . I interchange between a round cover and the "Ham Can" while using an over sized K&N filter. To bolt up the stock "HamCan", take the bracket off the factory element and simply put it on the BS filter. Also, you can buy a replacement filter for the stage 2 BigSucker and put it in your stage 1 kit. The filter element is the only difference in the stage 1 and 2. There's one replacement filter for all stage 2 applications. 3 holes match the CV 40, the others plug off. Now go try | + | |
| + | You don't need to run a filter on this or any other breather. That is if your vent line is 12 inches or longer. It's just not necessary. Keep in mind your stock breather holes were just 1/16 of an inch. This is a huge improvement. | ||
| + | Here's an opportunity to paint the backing plate. Mask off the Air cleaner side and the area on the back where the carb gasket sits. I used HD aerosol part# 98606DH the same color as my motor. When your done this will look good. No horseshoe, hoses, or filters in sight. It looks very much like a factory set up. | ||
| + | A variety of air filters and covers can now be used. . I interchange between a round cover and the "Ham Can" while using an over sized K&N filter. To bolt up the stock "Ham Can", take the bracket off the factory element and simply put it on the BS filter. Also, you can buy a replacement filter for the stage 2 Big Sucker and put it in your stage 1 kit. The filter element is the only difference in the stage 1 and 2. There's one replacement filter for all stage 2 applications. 3 holes match the CV 40, the others plug off. Now go try. | ||
| + | \\ | ||
| ====== Running the Breather Hoses (91 and UP) ====== | ====== Running the Breather Hoses (91 and UP) ====== | ||
| Line 89: | Line 85: | ||
| ===== Vent Line Routing ===== | ===== Vent Line Routing ===== | ||
| ==== Above vs Below the Head Vents ==== | ==== Above vs Below the Head Vents ==== | ||
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| There has been debatable ways to route the vent lines off the heads when doing air cleaner mods. \\ | There has been debatable ways to route the vent lines off the heads when doing air cleaner mods. \\ | ||
| However, exact line routing comes down to function over fashion. \\ | However, exact line routing comes down to function over fashion. \\ | ||
| Line 115: | Line 110: | ||
| Vent lines mounted low allows oil to leave the heads. \\ | Vent lines mounted low allows oil to leave the heads. \\ | ||
| - | {{:techtalk:ref:carb:breather_lines_mounted_low_by_ixl2relax.jpg?direct&300|}} ((photo by IXL2Relax of the XLFORUM http://xlforum.net/forums/showthread.php?t=1051311&page=46)) {{:techtalk:ref:carb:breather_lines_mounted_low_by_beuz.jpg?direct&300|}} ((photo by beuz of the XLFORUM http://xlforum.net/forums/showthread.php?t=11697&page=582)) | + | {{:techtalk:ref:carb:breather_lines_mounted_low_by_ixl2relax.jpg?direct&300|}} ((photo by IXL2Relax of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/111555-air-cleaner-porn/page46?t=1051311&page=46)) {{:techtalk:ref:carb:breather_lines_mounted_low_by_beuz.jpg?direct&300|}} ((photo by beuz of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-styles/chopper-bobber-talk/7694-sporty-bobber-pictures/page582?t=11697&page=582)) |
| Vent lines mounted high tend to promote a mixture of oil and condensation settling near the head connection of the hose. \\ | Vent lines mounted high tend to promote a mixture of oil and condensation settling near the head connection of the hose. \\ | ||
| - | {{techtalk:ref:engmech:kuryakyn_breather_bolts_1_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1690623)) {{techtalk:ref:engmech:kuryakyn_breather_bolts_2_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1690623)) | + | {{techtalk:ref:engmech:kuryakyn_breather_bolts_1_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/157991-ooozzz-running-out-of-my-crank-case-breather-hose?t=1690623)) {{techtalk:ref:engmech:kuryakyn_breather_bolts_2_by_scar55.jpg?direct&300|}} ((photo by Scar55 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/157991-ooozzz-running-out-of-my-crank-case-breather-hose?t=1690623)) |
| ====== Breather Bolts ====== | ====== Breather Bolts ====== | ||
| Kuryakyn banjo bolts: \\ | Kuryakyn banjo bolts: \\ | ||
| - | {{techtalk:ref:engmech:kuryakyn_banjo_breather_bolts_1_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074032&page=2)) {{techtalk:ref:engmech:kuryakyn_banjo_breather_bolts_2_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2074032&page=2)) | + | {{techtalk:ref:engmech:kuryakyn_banjo_breather_bolts_1_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/197402-pcv-valve-in-sporty-rocker-covers/page2?t=2074032&page=2)) {{techtalk:ref:engmech:kuryakyn_banjo_breather_bolts_2_by_mick42.jpg?direct&300|}} ((photo by mick42 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/197402-pcv-valve-in-sporty-rocker-covers/page2?t=2074032&page=2)) |
| - | + | ||
| ====== Pics of Air Cleaners ====== | ====== Pics of Air Cleaners ====== | ||
| - | | Caddy Ornament. ((photos by Lone Rider of the XLFORUM http://xlforum.net/forums/showthread.php?p=5712103&highlight=heel+toe#post5712103)) || | + | | Caddy Ornament. ((photos by Lone Rider of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-accessories/195309-those-little-ways-to-personalize-your-bike?highlight=heel+toe#post4250879)) || |
| |{{:techtalk:ref:carb:caddy_ornament_ac_1_by_lone_rider.jpg?direct&300|}}|{{:techtalk:ref:carb:caddy_ornament_ac_2_by_lone_rider.jpg?direct&300|}}| | |{{:techtalk:ref:carb:caddy_ornament_ac_1_by_lone_rider.jpg?direct&300|}}|{{:techtalk:ref:carb:caddy_ornament_ac_2_by_lone_rider.jpg?direct&300|}}| | ||
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