Differences
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techtalk:ih:engmech01c [2023/12/19 23:47] hippysmack [Primary / Transmission External Vent (1977-1985)] |
techtalk:ih:engmech01c [2023/12/19 23:52] hippysmack [Upper Oil Feed Galley] |
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| * 1957-1981 and some E1982 cases have an elongated angled front to back slot for the oil feed galley in the top of the gearcase. \\ A hole is then drilled thru the left end of the slot to feed each rocker box oil line. \\ The casting above the oil slot is taller in that area especially on 77-E79 motors. \\ Cam Cover gasket was modified (25224-52A) to help control leaks by adding a slot to the oil feed hole. | * 1957-1981 and some E1982 cases have an elongated angled front to back slot for the oil feed galley in the top of the gearcase. \\ A hole is then drilled thru the left end of the slot to feed each rocker box oil line. \\ The casting above the oil slot is taller in that area especially on 77-E79 motors. \\ Cam Cover gasket was modified (25224-52A) to help control leaks by adding a slot to the oil feed hole. | ||
| - | * Slot construction (for those with the slot): ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1535474&page=5)) \\ On 1957-1963 models, the slot is plunge cut with and end mill. \\ On 1964-up models, the slot is cast into the case. | + | * Slot construction (for those with the slot): ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/141725-early-sportster-engine-identification-1969-earlier/page5?t=1535474&page=5)) \\ On 1957-1963 models, the slot is plunge cut with and end mill. \\ On 1964-up models, the slot is cast into the case. |
| * M1980 Upper Gearcase Casting Change: \\ In November of 1979, the MoCo realized a possibile high pressure oil leak around the upper oil seam between the cam cover and the gearcase. ((TSB M-778 dated May 13,1980)) \\ The case casting was reworked and modified to eliminate this possibility. \\ The upper feed galley (slot) profile was changed. The top boss on the gearcase was shaved back. \\ The cover gasket (25224-52A) was modified to fit the revised castings and help eliminate possible leaks on earlier crankcases. | * M1980 Upper Gearcase Casting Change: \\ In November of 1979, the MoCo realized a possibile high pressure oil leak around the upper oil seam between the cam cover and the gearcase. ((TSB M-778 dated May 13,1980)) \\ The case casting was reworked and modified to eliminate this possibility. \\ The upper feed galley (slot) profile was changed. The top boss on the gearcase was shaved back. \\ The cover gasket (25224-52A) was modified to fit the revised castings and help eliminate possible leaks on earlier crankcases. | ||
| * 1982-1985 and some L1981 cases do not have an upper feed oil slot. \\ The slot was deleted and the large boss is cast around the feed galley area. \\ Oil is fed to the rocker box lines simply by way of a hole drilled thru the large boss in the upper gearcase. | * 1982-1985 and some L1981 cases do not have an upper feed oil slot. \\ The slot was deleted and the large boss is cast around the feed galley area. \\ Oil is fed to the rocker box lines simply by way of a hole drilled thru the large boss in the upper gearcase. | ||
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| * 1957-1966 XLH and 1958-1969 XLCH (short frame): | * 1957-1966 XLH and 1958-1969 XLCH (short frame): | ||
| - | * These use the 4 hole rear mount and the cases also have 4 top holes and 3 middle studs to hold rear mount to the cases. \\ All 1966 and earlier bikes were kick start only. One mount and one case configuration covered all models. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5381546&highlight=xlh#post5381546)) \\ | + | * These use the 4 hole rear mount and the cases also have 4 top holes and 3 middle studs to hold rear mount to the cases. \\ All 1966 and earlier bikes were kick start only. One mount and one case configuration covered all models. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/122691-84-cubic-inch-900-motor-teardown-pics/page28?highlight=xlh#post3914335)) \\ |
| * 1967-1969 XLH (long frame): | * 1967-1969 XLH (long frame): | ||
| - | * In 1967, the first electric XLH came out and to fit the starter, the cases and the mount were changed from 4 bolt to 2 bolt / 3 studs on XLH only. \\ The front two bolts were dropped to make room for the electric leg (battery box / oil bracket bolted in the vacated area). \\ Then there were two mounts and two case sets, one each for 1967-1976 XLH and 1967-1969 XLCH. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5381546&highlight=xlh#post5381546)) ((Dr Dick http://xlforum.net/forums/showthread.php?p=5133975#post5133975)) \\ | + | * In 1967, the first electric XLH came out and to fit the starter, the cases and the mount were changed from 4 bolt to 2 bolt / 3 studs on XLH only. \\ The front two bolts were dropped to make room for the electric leg (battery box / oil bracket bolted in the vacated area). \\ Then there were two mounts and two case sets, one each for 1967-1976 XLH and 1967-1969 XLCH. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/122691-84-cubic-inch-900-motor-teardown-pics/page28?highlight=xlh#post3914335)) ((Dr Dick https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/93964-how-to-remove-the-oil-transfer-valve/page3#post3744870)) \\ |
| - | * 1970-1985 All (long frame): \\ In 1970, the old 4 bolt cases/mounts were dropped completely and the XLCH was redesigned. \\ It was now based on the electric start bike, with the starter removed and a kicker fitted instead. \\ This is how the 1970-1976 XLCH is built (as a stripped down XLH rather than the old traditional kick only design). ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5381546&highlight=xlh#post5381546)) | + | * 1970-1985 All (long frame): \\ In 1970, the old 4 bolt cases/mounts were dropped completely and the XLCH was redesigned. \\ It was now based on the electric start bike, with the starter removed and a kicker fitted instead. \\ This is how the 1970-1976 XLCH is built (as a stripped down XLH rather than the old traditional kick only design). ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/122691-84-cubic-inch-900-motor-teardown-pics/page28?highlight=xlh#post3914335)) |
| * 1970-1981 rear mounts have the hole in middle for a kicker. | * 1970-1981 rear mounts have the hole in middle for a kicker. | ||
| * 1982-1985 rear mounts do not have the kicker hole. | * 1982-1985 rear mounts do not have the kicker hole. | ||
