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techtalk:ref:engmech07s [2020/10/05 18:32] hippysmack [XR-750 Breather Valve] |
techtalk:ref:engmech07s [2020/11/01 00:19] hippysmack [XR-750 8-Ball Breather Valve] |
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| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| ====== REF: Engine Mechanicals - Sub-07S ====== | ====== REF: Engine Mechanicals - Sub-07S ====== | ||
| - | ====== XR-750 Breather Valve ====== | + | ====== XR-750 8-Ball Breather Valve ====== |
| The earliest alloy XR's put a vent to the back of the crankcase with a big one-way valve on it. ((barefoot of the XLFORUM http://xlforum.net/forums/showthread.php?t=1982389&page=6)) \\ | The earliest alloy XR's put a vent to the back of the crankcase with a big one-way valve on it. ((barefoot of the XLFORUM http://xlforum.net/forums/showthread.php?t=1982389&page=6)) \\ | ||
| The idea was, when the pistons go down it pushes the oil into the camcase and scavenge pump. \\ | The idea was, when the pistons go down it pushes the oil into the camcase and scavenge pump. \\ | ||
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| The 8-ball breather was designed to handle 45 cu. in. of volume. ((mrmom9r of the XLFORUM http://xlforum.net/forums/showthread.php?t=2041173&page=3)) \\ | The 8-ball breather was designed to handle 45 cu. in. of volume. ((mrmom9r of the XLFORUM http://xlforum.net/forums/showthread.php?t=2041173&page=3)) \\ | ||
| - | Here is the breather hole in the rear of the crankcase where the 8-ball breather assembly is fitted. \\ | + | {{:techtalk:ref:engmech:8-ball_breather_valve_pic_2_by_davixlrtt.jpg?direct&300|}} ((photo by davixlrtt of the XLFORUM http://xlforum.net/forums/showthread.php?p=5857958#post5857958)) {{:techtalk:ref:engmech:8-ball_breather_valve_pic_1_by_davixlrtt.jpg?direct&300|}} ((photo by davixlrtt of the XLFORUM http://xlforum.net/forums/showthread.php?p=5857958#post5857958)) \\ |
| - | {{:techtalk:ref:engmech:1972_xr-750_8-ball_breather_hole_in_case_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=4148222#post4148222)) \\ | + | |
| + | The first pic below shows the 3/4" tapped hole in the case behind the rear cylinder where the 8-ball breather assembly is fitted. \\ | ||
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| + | {{:techtalk:ref:engmech:1972_xr-750_8-ball_breather_hole_in_case_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=4148222#post4148222)) {{:techtalk:ref:engmech:1972_xr-750_crankcase_breather_by_brucstoudt.jpg?direct&300|}} ((photo by brucstoudt of the XLFORUM, cropped by Hippysmack http://xlforum.net/forums/showthread.php?t=2077883)) {{:gallery:iron:1972_xr-750_by_brucstoudt.jpg?direct&300|}} ((photo by brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?t=2077883)) \\ | ||
| ====== Notes from XLForum Members on the 8-Ball Breather ====== | ====== Notes from XLForum Members on the 8-Ball Breather ====== | ||
