Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision
Previous revision
techtalk:ref:engmech05f [2021/06/19 02:31]
hippysmack [Installing a Buell Rocker Box / Breather System on an Evo Sportster]
techtalk:ref:engmech05f [2023/12/21 21:27] (current)
hippysmack
Line 1: Line 1:
 [[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]] [[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]]
 ====== REF: Engine Mechanicals - Sub-05F ====== ====== REF: Engine Mechanicals - Sub-05F ======
-====== Installing a Buell Rocker Box / Breather System on an Evo Sportster ======+====== Installing a Buell XB Rocker Box / Breather System on an Evo Sportster ======
  
-{{techtalk:​ref:​engmech:​buell_xb_rocker_boxes-breathers_by_rubine.jpg?​direct&​300|}} ((photo by rubine of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=42202&​highlight=buell&​page=4)) \\+{{techtalk:​ref:​engmech:​buell_xb_rocker_boxes-breathers_by_rubine.jpg?​direct&​300|}} ((photo by rubine of the XLFORUM ​https://www.xlforum.net/​forum/buell-motorcycle-forum/​buell-motorcycle-top-end/​25478-how-do-buell-heads-vent/​page4?​t=42202&​highlight=buell&​page=4)) \\
  
 Some have reported better engine breathing and less oil leaking out the breather valve by using these Buell rocker boxes. \\ Some have reported better engine breathing and less oil leaking out the breather valve by using these Buell rocker boxes. \\
Line 9: Line 9:
  
 Considerations:​ \\ Considerations:​ \\
-  * 1991-2003 Sportsters will get rid of the middle spacer, eliminating one more gasket that could leak. \\ +  * 1991-2003 Sportsters will get rid of the middle spacer ​and umbrella valve, eliminating one more gasket that could leak. \\ 
-  * On 2004-up Sportsters, after removing the fuel tank, you might want to consider removing the top and front tie bars and the front motor mount. \\ (to rotate the engine down away from the frame to give you more space to work in) \\ Don’t forget to put a jack under the engine so it doesn’t drop on you when you undo the front motor mount. \\ Slowly lower the engine using the jack until the motor mount gets close to the front tie bar frame member. ((http://​thex1files.com/​External/​XBRockerCovers.htm)) \\ On 2004-up, you may have to shave off some areas around the motor mounts to gain clearance for the covers. \\ Depending on your fuel tank, you may want to point the breathers towards the rear of the bike. +  * On 2004-up Sportsters, after removing the fuel tank, you might want to consider removing the top and front tie bars and the front motor mount. \\ (to rotate the engine down away from the frame to give you more space to work in) \\ Don’t forget to put a jack under the engine so it doesn’t drop on you when you undo the front motor mount. \\ Slowly lower the engine using the jack until the motor mount gets close to the front tie bar frame member. ((http://​thex1files.com/​External/​XBRockerCovers.htm)) \\ On 2004-up, you may have to shave off some areas around the motor mounts to gain clearance for the covers. \\ Depending on your fuel tank, you may want to point the breathers towards the rear of the bike
 +  * The breather valve is not a PCV valve but rather a regular 91-03 umbrella valve, [[techtalk:​evo:​engmech07#​buell_xb_type_breather_valve|Click Here]] for more details on the valve. 
 +  * The breathers reside higher up on the boxes and should run a little cooler than the OEM Sportster umbrella system (may last longer). 
 +  * You know longer have to deal with the hoses coming off the heads as an upgrade to your breather venting system. 
 +  * You have to run vent hoses either to the air cleaner or somewhere else. Do not put a filter on the end of the hose. 
 +  * Most importantly,​ this upgrade WILL NOT STOP the occasional drips and condensation out the vent hose as that is an inherent symptom of the machine.
  
 ^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​600|}}||| ^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​600|}}|||
Line 32: Line 37:
 The rocker box mounted breather valves replace the OEM XL breather / umbrella valves. Vent lines off the breathers were tied together, into a catch can and to the rear of the bike. \\ The rocker box mounted breather valves replace the OEM XL breather / umbrella valves. Vent lines off the breathers were tied together, into a catch can and to the rear of the bike. \\
  
-|Both breather valves are connected to a ‘Y’ connector that runs along the frame under the tank. ((photos by mick42 of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?p=5762210#​post5762210)) The tube \\ comes down into a catch can that can be emptied when it gets too much oil in it. On a long hard ride the \\ catch can will clean its self out.  ||+|Both breather valves are connected to a ‘Y’ connector that runs along the frame under the tank. ((photos by mick42 of the XLFORUM ​https://www.xlforum.net/​forum/buell-motorcycle-forum/​buell-motorcycle-top-end/​25478-how-do-buell-heads-vent/​page4?t=42202&​highlight=buell&​page=4)) The tube \\ comes down into a catch can that can be emptied when it gets too much oil in it. On a long hard ride the \\ catch can will clean its self out.  ||
 |{{techtalk:​ref:​engmech:​buell_rocker_box_and_breather_on_a_sporty_1_by_mick42.jpg?​direct&​300|}}| {{techtalk:​ref:​engmech:​buell_rocker_box_and_breather_on_a_sporty_2_by_mick42.jpg?​direct&​300|}}| |{{techtalk:​ref:​engmech:​buell_rocker_box_and_breather_on_a_sporty_1_by_mick42.jpg?​direct&​300|}}| {{techtalk:​ref:​engmech:​buell_rocker_box_and_breather_on_a_sporty_2_by_mick42.jpg?​direct&​300|}}|
  
 The tube from the catch can runs up under the fender and exits at the rear on the left side of the bike. When the bike is on the jiffy stand the hose is way over the side. \\ The tube from the catch can runs up under the fender and exits at the rear on the left side of the bike. When the bike is on the jiffy stand the hose is way over the side. \\
 If some oil drips from the end, it’s not near the tire and there is no oily mist spraying over all the bike while riding. \\ If some oil drips from the end, it’s not near the tire and there is no oily mist spraying over all the bike while riding. \\
-|Oil from catch can on left side under fender. ((photo by mick42 of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​p=5762210#post5762210))| +|Oil from catch can on left side under fender. ((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#post4318378))| 
 |{{techtalk:​ref:​engmech:​buell_rocker_box_and_breather_on_a_sporty_3_by_mick42.jpg?​direct&​250|}}| |{{techtalk:​ref:​engmech:​buell_rocker_box_and_breather_on_a_sporty_3_by_mick42.jpg?​direct&​250|}}|