Differences
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techtalk:evo:engmech01c [2022/01/20 06:39] hippysmack [Interchangeability] |
techtalk:evo:engmech01c [2022/02/08 21:36] hippysmack [Interchangeability] |
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| {{:techtalk:evo:body:1986-2003_sportster_frame_kickstand_mount_locations_.jpg?direct&300|}} \\ | {{:techtalk:evo:body:1986-2003_sportster_frame_kickstand_mount_locations_.jpg?direct&300|}} \\ | ||
| - | * **Swapping engine cases**: | + | * **Swapping engine cases**: \\ Since 1976, the MoCo has not sold left / right case halves individually. They sold replacement cases as a left / right set. \\ So it's up to the owner to decide if swapping out a case half is the right thing to do as opposed to swapping a matched case set. \\ Case sets are factory machined / line bored and the precision is not going to be the exact same by swapping out halves from different cases. \\ Likewise, if you are swapping case halves, make sure to have it done by a competent machinist. \\ |
| ====== 1986-1990 Sportster Cases ====== | ====== 1986-1990 Sportster Cases ====== | ||
| * 1986-E1987 (all) | * 1986-E1987 (all) | ||
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| * The oil filter pad for 1991-up models is built into the case and is not removable. | * The oil filter pad for 1991-up models is built into the case and is not removable. | ||
| * Oil is fed to the engine from the top down. Oil is pumped to the oil filter pad by way of an external hose from the oil pump. \\ A drilled passage thru the upper case runs from the filter mount to the upper cam chest feed galley. \\ Then oil is pump thru passages in the cam cover to the pinion shaft to crankpin. | * Oil is fed to the engine from the top down. Oil is pumped to the oil filter pad by way of an external hose from the oil pump. \\ A drilled passage thru the upper case runs from the filter mount to the upper cam chest feed galley. \\ Then oil is pump thru passages in the cam cover to the pinion shaft to crankpin. | ||
| - | * Oil pump information: \\ The oil pump design changed for the new routing system thru the cases. \\ Any 1991-1997 Sportster oil pump is a direct bolt-on for 1991-1997 motors (will bolt up but will not work on 98-up cases). \\ Any 1998-present Sportster oil pump is a direct bolt-on for 91-up cases but has a designed inlet in the top of the pump for cam chest oil scavenge. \\ Will function on 1991-1997 cases. | + | * Oil pump information: \\ The oil pump design changed for the new routing system thru the cases. \\ Any 1991-1997 Sportster oil pump is a direct bolt-on for 1991-1997 motors (will bolt up but will not drain 1998-up cam chests). \\ Any 1998-present Sportster oil pump is a direct bolt-on for 91-up cases but has a designed inlet in the top of the pump for cam chest oil scavenge. \\ Will function on 1991-1997 cases. |
| * The breather holes were redesigned using only two holes thru the cam wall with the middle hole from previous deleted. \\ The two remaining holes were enlarged in a rectangular fashion creating a bigger area for air to escape the crankcase. | * The breather holes were redesigned using only two holes thru the cam wall with the middle hole from previous deleted. \\ The two remaining holes were enlarged in a rectangular fashion creating a bigger area for air to escape the crankcase. | ||
| * 1991 cases (only), the oil pressure bypass was still used but installed thru the case into the back side of the oil filter mount. \\ Still dumping over pressured oil into the cam chest. | * 1991 cases (only), the oil pressure bypass was still used but installed thru the case into the back side of the oil filter mount. \\ Still dumping over pressured oil into the cam chest. | ||
