Differences
This shows you the differences between two versions of the page.
| Both sides previous revision Previous revision Next revision | Previous revision Next revision Both sides next revision | ||
|
techtalk:ih:engmech01c [2023/12/19 23:43] hippysmack [Transmission Countershaft Boss] |
techtalk:ih:engmech01c [2023/12/19 23:47] hippysmack [Primary / Transmission External Vent (1977-1985)] |
||
|---|---|---|---|
| Line 473: | Line 473: | ||
| ==== Speedometer Drive Gear Boss ==== | ==== Speedometer Drive Gear Boss ==== | ||
| * 1952-1972 K/XL/XLH and 1959-1972 XLCH models use a mechanical speedometer run by a (11T) drive gear unit meshed at the trans countershaft. \\ The drive gear screws into the boss built into the right case for it. This area of the case is notorious for blowing out. | * 1952-1972 K/XL/XLH and 1959-1972 XLCH models use a mechanical speedometer run by a (11T) drive gear unit meshed at the trans countershaft. \\ The drive gear screws into the boss built into the right case for it. This area of the case is notorious for blowing out. | ||
| - | * 1973 AND LATER CASES DO NOT HAVE THE SPEEDOMETER DRIVE AT THE COUNTERSHAFT BOSS. \\ The drive gear was deleted on the right case and the new drive unit runs off the front wheel axle. \\ The drive unit boss thru to the inside housing on the right case was also deleted. This leaves more material in that area and more strength. ((brucstoudt of the XLFORUM http://xlforum.net/forums/showthread.php?p=5927789#post5927789)) | + | * 1973 AND LATER CASES DO NOT HAVE THE SPEEDOMETER DRIVE AT THE COUNTERSHAFT BOSS. \\ The drive gear was deleted on the right case and the new drive unit runs off the front wheel axle. \\ The drive unit boss thru to the inside housing on the right case was also deleted. This leaves more material in that area and more strength. ((brucstoudt of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/203328-71-xlh-value/page4#post4545503)) |
| | 1972-earlier speedometer drive gear boss ((photo courtesy of Ebay seller, inlinefabrication. [[https://www.ebay.com/str/inlinefabrication|Link to Ebay Store]] )) | 1968 case repaired ((photo courtesy of Ebay seller, animalhouse2010, [[https://www.ebay.com/str/animalhouse2010?_trksid=p2047675.l2563|Link to Ebay store:]] )) | 1973-later have no speedo drive gear boss ((photo courtesy of Frost Cycle Shack [[https://www.ebay.com/str/frostcycleshack|Link to Ebay Store]] )) | | | 1972-earlier speedometer drive gear boss ((photo courtesy of Ebay seller, inlinefabrication. [[https://www.ebay.com/str/inlinefabrication|Link to Ebay Store]] )) | 1968 case repaired ((photo courtesy of Ebay seller, animalhouse2010, [[https://www.ebay.com/str/animalhouse2010?_trksid=p2047675.l2563|Link to Ebay store:]] )) | 1973-later have no speedo drive gear boss ((photo courtesy of Frost Cycle Shack [[https://www.ebay.com/str/frostcycleshack|Link to Ebay Store]] )) | | ||
| Line 484: | Line 484: | ||
| * 1977-1980 models: | * 1977-1980 models: | ||
| - | * The transmission was vented to atmosphere starting in 1977. \\ The vent fitting is threaded into the right case at the inner hole closest to case parting seam (previously battery box / oil bracket bolt location). \\ The inner hole is in a position where trans oil doesn't seem to get tossed around as much so it doesn't eject much oil. \\ All 76< long frame cases (except 71ch) will accept the vent bolt in the 77> position. \\ Conversely installing the vent bolt in any of the four short frame rear mount bolt holes usually results in drips from the vent. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5133975#post5133975)) \\ This particular fitting works with either the Prestolite or Hitachi starters. | + | * The transmission was vented to atmosphere starting in 1977. \\ The vent fitting is threaded into the right case at the inner hole closest to case parting seam (previously battery box / oil bracket bolt location). \\ The inner hole is in a position where trans oil doesn't seem to get tossed around as much so it doesn't eject much oil. \\ All 76< long frame cases (except 71ch) will accept the vent bolt in the 77> position. \\ Conversely installing the vent bolt in any of the four short frame rear mount bolt holes usually results in drips from the vent. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/93964-how-to-remove-the-oil-transfer-valve/page3#post3744870)) \\ This particular fitting works with either the Prestolite or Hitachi starters. |
| * 1980-1985 models: \\ | * 1980-1985 models: \\ | ||
| * These models have a 1/4" OD metal tube (26272-81) pressed into the right case instead of a threaded fitting. \\ The smaller nipple works with the beefier Nippon Denso starter change in 1981. \\ **1981 cases**: The pressed-in vent nipple is on the top right of the case just under the end of the (new type) starter solenoid. \\ **1982-1985 cases**: The pressed-in vent nipple was moved farther in toward the center, still under the solenoid (back to 77-80 location). | * These models have a 1/4" OD metal tube (26272-81) pressed into the right case instead of a threaded fitting. \\ The smaller nipple works with the beefier Nippon Denso starter change in 1981. \\ **1981 cases**: The pressed-in vent nipple is on the top right of the case just under the end of the (new type) starter solenoid. \\ **1982-1985 cases**: The pressed-in vent nipple was moved farther in toward the center, still under the solenoid (back to 77-80 location). | ||
