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techtalk:ref:carb06 [2021/01/21 14:51]
ixl2relax [Big Sucker w/External Breather]
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. \\
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 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|}} {{:​techtalk:​ref:​carb:​bigsucker-extbreathermod-dodgenbullets.jpg?​600|}}
  
 **How to modify the Big Sucker to vent to the atmosphere.**\\ **How to modify the Big Sucker to vent to the atmosphere.**\\
-http://​xlforum.net/​forums/showthread.php?​t=34956 ​(There are a number of mods listed in this thread)\\+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)\\ Commentary Posted by Dodgenbullets (See Post #17 & #19)\\
  
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 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. 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. 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.+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.
  
 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. 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.
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 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. 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.
  
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 ====== Running the Breather Hoses (91 and UP) ====== ====== Running the Breather Hoses (91 and UP) ======
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 ===== 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. \\
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 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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