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techtalk:ih:engmech09 [2021/08/04 19:15] hippysmack [Sub Documents] |
techtalk:ih:engmech09 [2023/12/27 21:08] (current) hippysmack |
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| * [[techtalk:ih:engmech09c|Ironhead Motor Mount Torque Specs]] | * [[techtalk:ih:engmech09c|Ironhead Motor Mount Torque Specs]] | ||
| * [[techtalk:ih:engmech09p|Discrepancies with Motor Mount Illustrations in the HD Manuals (57-76)]] | * [[techtalk:ih:engmech09p|Discrepancies with Motor Mount Illustrations in the HD Manuals (57-76)]] | ||
| + | |||
| ===== Bolt Grades ===== | ===== Bolt Grades ===== | ||
| There are conflicting views on what grade bolts to use. \\ | There are conflicting views on what grade bolts to use. \\ | ||
| Line 18: | Line 19: | ||
| And that upon a collision, a grade 8 bolt would break or shear whereas a grade 5 bolt would bend or deform (but still remain "intact"). \\ | And that upon a collision, a grade 8 bolt would break or shear whereas a grade 5 bolt would bend or deform (but still remain "intact"). \\ | ||
| (That reasoning is debatable however. Both have been used successfully) \\ | (That reasoning is debatable however. Both have been used successfully) \\ | ||
| - | Others say a grade 8 bolt is always harder, and stronger in tensile and shear than a grade 5. ((DDDDylan of the XLFORUM http://xlforum.net/forums/showthread.php?t=829078&page=2)) \\ | + | Others say a grade 8 bolt is always harder, and stronger in tensile and shear than a grade 5. ((DDDDylan of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/97896-motor-mount-bolts-need-specs/page2?t=829078&page=2)) \\ |
| (30,000 psi higher in tensile strength and 40,000-50,000 psi higher in shear strength). \\ | (30,000 psi higher in tensile strength and 40,000-50,000 psi higher in shear strength). \\ | ||
| If loaded to failure, grade 5 will have more % elongation than a grade 8 before it finally breaks, but will still break at a lower stress than a grade 8. \\ | If loaded to failure, grade 5 will have more % elongation than a grade 8 before it finally breaks, but will still break at a lower stress than a grade 8. \\ | ||
| Line 24: | Line 25: | ||
| Lower grades are used to save cost over higher grades when cost is a factor. Lower grades offer no mechanical advantage. \\ | Lower grades are used to save cost over higher grades when cost is a factor. Lower grades offer no mechanical advantage. \\ | ||
| The MoCo's first use of grade 8 motor mount bolts was in 1986. \\ | The MoCo's first use of grade 8 motor mount bolts was in 1986. \\ | ||
| - | |||
| ===== Parts Lists ===== | ===== Parts Lists ===== | ||
| - | ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&820|}}|||| | + | ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&820|}}||||| |
| - | | Rear Motor Mounts |||| | + | | Rear Motor Mounts ||||| |
| - | |Part#|Year model|Hole for kicker|Notes| | + | |Part#|Year model|Hole for kicker|Rear Mount \\ Bushing|Notes| |
| - | |16201-52|52-60 K Models/XL/XLH/XLCH| ✔ |4 hole| | + | |16201-52|52-60 K Models/XL/XLH/XLCH| ✔ | ✘ |4 hole mount.| |
| - | |16201-58|61-E62 XLH/XLCH \\ 67-69 XLCH| ✔ |4 hole| | + | |16201-58|61-E62 XLH/XLCH| ✔ | ✘ |4 hole mount. \\ Replaced by 16201-52 (-65)| |
| - | |16201-58A|L62-66 XLH/XLCH \\ 67-69 XLCH| ✔ |4 hole| | + | |16201-58A|L62-66 XLH/XLCH \\ 67-69 XLCH| ✔ |16202-62|4 hole mount.| |
| - | |16203-67|67-81 XL/XLH/XLS \\ 70-81 XLCH| ✔ |2 hole| | + | |16203-67|67-81 XL/XLH/XLS \\ 70-81 XLCH| ✔ |16202-62|2 hole mount.| |
| - | |16203-82|82-83 All| ✘ |2 hole. Replaced by 16203-82A. Appearance- cast| | + | |16203-82|82-83 All| ✘ |16240-82|2 hole mount. Replaced by 16203-82A. \\ Appearance- cast| |
| - | |16203-82A|84-90 All| ✘ |2 hole. Replacement for 16203-82. Appearance- billet| | + | |16203-82A|84-90 All| ✘ |16240-82|2 hole mount. Replacement for 16203-82. \\ Appearance- billet| |
| ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&820|}}||| | ^{{techtalk:miscres:instruction_sheet_header_4.png?nolink&820|}}||| | ||
| Line 78: | Line 78: | ||
| * [[techtalk:ih:engmech09h|Rear Mount Assembly]] | * [[techtalk:ih:engmech09h|Rear Mount Assembly]] | ||
| * [[techtalk:ref:engmech09|Aftermarket Rear Mount Option (Pingel)]] | * [[techtalk:ref:engmech09|Aftermarket Rear Mount Option (Pingel)]] | ||
| + | |||
| ===== Using studs vs bolts on rear mounts ===== | ===== Using studs vs bolts on rear mounts ===== | ||
| The stud (or bolt) is threaded into an aluminum casting (the case) which is not noted for having great strength. ((piniongear at HD Forums https://www.hdforums.com/forum/ironhead/633728-ironhead-rear-motor-mount-stud.html)) \\ | The stud (or bolt) is threaded into an aluminum casting (the case) which is not noted for having great strength. ((piniongear at HD Forums https://www.hdforums.com/forum/ironhead/633728-ironhead-rear-motor-mount-stud.html)) \\ | ||
| Line 88: | Line 89: | ||
| ===== 1952-1981 rear mounts ===== | ===== 1952-1981 rear mounts ===== | ||
| - | The old rear mounts and the crankcase have 4 holes. ((piniongear of the XLFORUM http://xlforum.net/forums/showthread.php?t=1297584&page=19)) \\ | + | The old rear mounts and the crankcase have 4 holes. ((piniongear of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/127032-getting-this-78-back-to-the-way-it-should-be/page19?t=1297584&page=19)) \\ |
| When Harley changed to 2 hole mounts, all they did was knock the front 2 holes off the old mount and later eliminated the 2 front holes in the case. \\ | When Harley changed to 2 hole mounts, all they did was knock the front 2 holes off the old mount and later eliminated the 2 front holes in the case. \\ | ||
| But the hole spacing stayed the same. \\ | But the hole spacing stayed the same. \\ | ||
| So if you want to use a 4 hole mount on a 2 hole case; \\ | So if you want to use a 4 hole mount on a 2 hole case; \\ | ||
| All you have to do, if you should be so lucky to find a steel mount, is saw off the front 2 hole area of the mount. \\ | All you have to do, if you should be so lucky to find a steel mount, is saw off the front 2 hole area of the mount. \\ | ||
| - | If you want to use a 2 hole mount on a 4 hole case, you'll have to stick some short bolts in to plug the 2 unused case holes but it should fit just fine. ((8ball of the XLFORUM http://xlforum.net/forums/showthread.php?t=2031256)) \\ | + | If you want to use a 2 hole mount on a 4 hole case, you'll have to stick some short bolts in to plug the 2 unused case holes but it should fit just fine. ((8ball of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/190594-2-bolt-vs-4-bolt-rear-motor-mount?t=2031256)) \\ |
| - | Here are the 4 kick only (4 bolt) rear motor mounts. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=3204448#post3204448)) \\ | + | Here are the 4 kick only (4 bolt) rear motor mounts. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page9#post2391464)) \\ |
| From left to right (each pic below): | From left to right (each pic below): | ||
| - 1952-1956 k model (iron). \\ Note the smaller hole for kicker shaft. The K kicker shaft used a smaller thrust collar than XL. | - 1952-1956 k model (iron). \\ Note the smaller hole for kicker shaft. The K kicker shaft used a smaller thrust collar than XL. | ||
| - 1957-E1962 (iron). | - 1957-E1962 (iron). | ||
| - | - The third is belived to be an XR or R model (aluminium). \\ It does not use and is not machined for the steel inserts for the lower bolts. \\ It came with a 60 XLR basket. | + | - The third is believed to be an XR or R model (aluminium). \\ It does not use and is not machined for the steel inserts for the lower bolts. \\ It came with a 60 XLR basket. |
| - L1962-up uses the steel inserts for the lower bolts. | - L1962-up uses the steel inserts for the lower bolts. | ||
| - | The first 3 use the 2-1/16" long lower bolts(when not using the passenger peg mount). \\ | + | The first 3 use the 2-1/16" long lower bolts (when not using the passenger peg mount). \\ |
| The late one uses 2-1/4" long lower bolts (when not using the passenger peg mount). \\ | The late one uses 2-1/4" long lower bolts (when not using the passenger peg mount). \\ | ||
| - | {{techtalk:ih:engmech:rear_motor_mounts_1_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=3204448#post3204448)) {{techtalk:ih:engmech:rear_motor_mounts_2_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=3204448#post3204448)) \\ | + | {{techtalk:ih:engmech:rear_motor_mounts_1_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page9#post2391464)) {{techtalk:ih:engmech:rear_motor_mounts_2_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page9#post2391464)) \\ |
| The key to understanding the evolution of these is knowing that 60-down used a 6 bolt lower battery tray and 61-up used a 4 bolt battery tray. \\ | The key to understanding the evolution of these is knowing that 60-down used a 6 bolt lower battery tray and 61-up used a 4 bolt battery tray. \\ | ||
| Line 112: | Line 113: | ||
| The two bolts at top flange were no longer incorporated into the tray, so the mounts were not milled. \\ | The two bolts at top flange were no longer incorporated into the tray, so the mounts were not milled. \\ | ||
| - | {{techtalk:ih:engmech:rear_motor_mounts_3_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?p=3246441#post3246441)) {{:techtalk:ih:engmech:rear_motor_mount_by_murph1068.jpg?direct&300|}} ((photo by murph1068 of the XLFORUM http://xlforum.net/forums/showthread.php?t=2075011)) \\ | + | {{techtalk:ih:engmech:rear_motor_mounts_3_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page9#post2391464)) {{:techtalk:ih:engmech:rear_motor_mount_by_murph1068.jpg?direct&300|}} ((photo by murph1068 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/198269-1960-xlch-resto-rider?t=2075011)) \\ |
| More 16201-58 pics: \\ | More 16201-58 pics: \\ | ||
| This mount could be had in 1960 for $25.70 \\ | This mount could be had in 1960 for $25.70 \\ | ||
| - | {{techtalk:ih:engmech:16201-58_motor_mount_pic_1_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720&page=21)) {{techtalk:ih:engmech:16201-58_motor_mount_pic_2_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720&page=21)) \\ | + | {{techtalk:ih:engmech:16201-58_motor_mount_pic_1_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page21?t=1062720&page=21)) {{techtalk:ih:engmech:16201-58_motor_mount_pic_2_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page21?t=1062720&page=21)) \\ |
| - | {{techtalk:ih:engmech:16201-58_motor_mount_pic_3_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720&page=21)) {{techtalk:ih:engmech:16201-58_motor_mount_pic_4_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1062720&page=21)) \\ | + | {{techtalk:ih:engmech:16201-58_motor_mount_pic_3_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page21?t=1062720&page=21)) {{techtalk:ih:engmech:16201-58_motor_mount_pic_4_by_dr_dick.jpg?direct&300|}} ((photo by Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/112326-a-photo-catalog-of-ironhead-parts/page21?t=1062720&page=21)) \\ |
| 16203-67 pics: \\ | 16203-67 pics: \\ | ||
| Line 126: | Line 127: | ||
| ===== 1982-1990 Rear Mounts ===== | ===== 1982-1990 Rear Mounts ===== | ||
| - | 1982-1990 mounts offset the engine 13/32" to the left of the position for pre 1982 engines and don't have the hole in them for the kicker shaft to go through. ((billeuze of the XLFORUM http://xlforum.net/forums/showthread.php?p=5791608&highlight=motor+mount#post5791608)) \\ | + | 1982-1990 mounts offset the engine 13/32" to the left of the position for pre 1982 engines and don't have the hole in them for the kicker shaft to go through. ((billeuze of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/198233-cracked-motor-mount/page4?highlight=motor+mount#post4358785)) \\ |
| 1984-1990 Rear Mount: \\ | 1984-1990 Rear Mount: \\ | ||
| Line 140: | Line 141: | ||
| * [[techtalk:ih:engmech09j|Lower Front Motor Mount Bolt Sizes and Lengths from Parts Catalogs]] | * [[techtalk:ih:engmech09j|Lower Front Motor Mount Bolt Sizes and Lengths from Parts Catalogs]] | ||
| - | |1957-1981 style lower front motor mounts. ((photos by bustert of the XLFORUM http://xlforum.net/forums/showthread.php?t=1266793))| | + | |1957-1981 style lower front motor mounts. ((photos by bustert of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/125713-roll-your-own-filter?t=1266793))| |
| |{{:techtalk:ref:oil:ih_oil_filter_mount_1_by_bustert.jpg?direct&300|}}| | |{{:techtalk:ref:oil:ih_oil_filter_mount_1_by_bustert.jpg?direct&300|}}| | ||
| - | |1982-E1984 lower front motor mounts / filter mount. (left shown) ((photos by DirtyCory of the XLFORUM http://xlforum.net/forums/showthread.php?t=1297584&page=55)) \\ See this page in the Sportsterpedia for [[techtalk:ref:oil13|building your own filter / motor mount]] for previous year models.|| L84-85 lower front motor mounts. ((photo by Joker of the XLFORUM)) | + | |1982-E1984 lower front motor mounts / filter mount. (left shown) ((photos by DirtyCory of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/127032-getting-this-78-back-to-the-way-it-should-be/page55?t=1297584&page=55)) \\ See this page in the Sportsterpedia for [[techtalk:ref:oil13|building your own filter / motor mount]] for previous year models.|| L84-85 lower front motor mounts. ((photo by Joker of the XLFORUM)) |
| |{{:techtalk:ih:oil:82-e84_motor_mount-oil_filter_mount_1_by_dirtycory.jpg?direct&300|}}|{{:techtalk:ih:oil:82-e84_motor_mount-oil_filter_mount_2_by_dirtycory.jpg?direct&300|}}|{{:techtalk:ih:engmech:l84-85_lower_front_mounts_and_hardware_by_joker.jpg?direct&300|}} | |{{:techtalk:ih:oil:82-e84_motor_mount-oil_filter_mount_1_by_dirtycory.jpg?direct&300|}}|{{:techtalk:ih:oil:82-e84_motor_mount-oil_filter_mount_2_by_dirtycory.jpg?direct&300|}}|{{:techtalk:ih:engmech:l84-85_lower_front_mounts_and_hardware_by_joker.jpg?direct&300|}} | ||
| Line 163: | Line 164: | ||
| **Head to head straddle mount (or center mount or head steady)**: \\ | **Head to head straddle mount (or center mount or head steady)**: \\ | ||
| There is only the one upper motor mount assembly from 57-76 consisting of a support brace between the heads and a cross mount from there to the frame. \\ | There is only the one upper motor mount assembly from 57-76 consisting of a support brace between the heads and a cross mount from there to the frame. \\ | ||
| - | Support brace (straddle mount) is engineered to deal with production tolerances, most owner created misalignments and is the first thing to assemble on top. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showpost.php?p=5079143&postcount=8)) ((http://xlforum.net/forums/showthread.php?t=1025434&page=2)) \\ | + | Support brace (straddle mount) is engineered to deal with production tolerances, most owner created misalignments and is the first thing to assemble on top. ((Dr Dick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/173033-top-motor-mount-nut-and-bolt?postcount=8#post3703399)) ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/109872-71-motor-mounts/page2?t=1025434&page=2)) \\ |
| The straddle bracket (16250-57) mounts from head to head and a cross brace bolts to the straddle and ties back to the frame. \\ | The straddle bracket (16250-57) mounts from head to head and a cross brace bolts to the straddle and ties back to the frame. \\ | ||
| The straddle bracket changed in L1971 and again in 1979 but the part number stayed the same. \\ | The straddle bracket changed in L1971 and again in 1979 but the part number stayed the same. \\ | ||
| Line 176: | Line 177: | ||
| |{{:techtalk:ih:engmech:motor_mount_center_straddle_1957-e1971_16250-75_by_animalhouse2010.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_center_straddle_l1971-1976_16250-57_by_tomscybershop.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:motor_mount_center_straddle_1957-e1971_16250-75_by_animalhouse2010.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_center_straddle_l1971-1976_16250-57_by_tomscybershop.jpg?direct&300|}}| | ||
| - | | 1958 XLC / XLCH, 1965-1976 XLH/XLCH Cross Brace ((photos courtesy of Ebay seller, rdpierce13. [[https://www.ebay.com/sch/rdpierce13/m.html?item=152823091671&ul_noapp=true&rt=nc&_trksid=p2047675.l2562|Link to seller's items for sale]] )) || Measurements taken on after market mounts. ((photo by wagoneer12 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1836118&page=2)) | | + | | 1958 XLC / XLCH, 1965-1976 XLH/XLCH Cross Brace ((photos courtesy of Ebay seller, rdpierce13. [[https://www.ebay.com/sch/rdpierce13/m.html?item=152823091671&ul_noapp=true&rt=nc&_trksid=p2047675.l2562|Link to seller's items for sale]] )) || Measurements taken on after market mounts. ((photo by wagoneer12 of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/171084-top-motor-mount-16251-58/page2?t=1836118&page=2)) | |
| |{{:techtalk:ih:engmech:motor_mount_cross_brace_16251-58_pic2_by_rdpierce13.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_cross_brace_16251-58_pic1_by_rdpierce13.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_-_1967_xlh_-_measurements_by_wagoneer12.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:motor_mount_cross_brace_16251-58_pic2_by_rdpierce13.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_cross_brace_16251-58_pic1_by_rdpierce13.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_-_1967_xlh_-_measurements_by_wagoneer12.jpg?direct&300|}}| | ||
| \\ | \\ | ||
| - | |||
| ===== 1977-1985 top mounts ===== | ===== 1977-1985 top mounts ===== | ||
| **Note**: \\ | **Note**: \\ | ||
| Line 190: | Line 190: | ||
| * **1977-1981 top frame mount locations**: | * **1977-1981 top frame mount locations**: | ||
| * The center motor mount and frame bracket from previous years was deleted for these models years. \\ The head to head strap was still used, just not attached to the frame there. \\ There are two motor to frame mounts on the top; an upper front mount to under the neck and an upper rear mount below the backbone. | * The center motor mount and frame bracket from previous years was deleted for these models years. \\ The head to head strap was still used, just not attached to the frame there. \\ There are two motor to frame mounts on the top; an upper front mount to under the neck and an upper rear mount below the backbone. | ||
| - | * The top front bracket (16265-76) is an "L" shaped piece (app. 1/8" thick) ((ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?p=4631039#post4631039)) with 3 slotted mounting holes. \\ It attaches to the front rocker box with 2 rocker cover mounting studs and also underneath the frame neck (by a 5/16" x 18 x 7/8" bolt that screws in upwards). \\ If the front of the frame is stock, you should see the threaded hole by looking up with a flashlight. It should be tapped for 5/16"-18 threads. \\ The upper front mount can be tedious to install. Easiest to install while installing the rocker cover while things are loose. ((Ironmick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1567505&page=3)) ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1644495)) | + | * The top front bracket (16265-76) is an "L" shaped piece (app. 1/8" thick) ((ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/158774-front-rocker-box-motor-mount#post3372910)) with 3 slotted mounting holes. \\ It attaches to the front rocker box with 2 rocker cover mounting studs and also underneath the frame neck (by a 5/16" x 18 x 7/8" bolt that screws in upwards). \\ If the front of the frame is stock, you should see the threaded hole by looking up with a flashlight. It should be tapped for 5/16"-18 threads. \\ The upper front mount can be tedious to install. Easiest to install while installing the rocker cover while things are loose. ((Ironmick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/144540-can-i-get-a-picture-of-the-upper-motor-mount/page3?t=1567505&page=3)) ((IronMick of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/152604-top-motor-mounts-1980-xlh?t=1644495)) |
| * The top rear bracket (16266-76) has a hole in the top center at the frame mount and two open slots on the bottom to rocker box studs. \\ The same bracket is used from 1977-1981. The part that's different between 77 and 78-81 models is the fasteners used. \\ The 77 upper rear motor mount is attached to the rear rocker box with bolts where 78-81 models were attached with dual threaded studs. \\ | * The top rear bracket (16266-76) has a hole in the top center at the frame mount and two open slots on the bottom to rocker box studs. \\ The same bracket is used from 1977-1981. The part that's different between 77 and 78-81 models is the fasteners used. \\ The 77 upper rear motor mount is attached to the rear rocker box with bolts where 78-81 models were attached with dual threaded studs. \\ | ||
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| Click on any pic to enlarge: \\ | Click on any pic to enlarge: \\ | ||
| - | {{:techtalk:ih:engmech:motor_mounts_-_top_1977-1981_by_ericfreeman.jpg?direct&400|}} ((photo by ericfreeman of the XLFORUM http://xlforum.net/forums/showthread.php?t=1699859)) {{:techtalk:ih:engmech:motor_mounts_-_top_1982-1985_by_83xlx.jpg?direct&400|}} ((photo by 83XLX of the XLFORUM http://xlforum.net/forums/showthread.php?t=1699851)) \\ | + | {{:techtalk:ih:engmech:motor_mounts_-_top_1977-1981_by_ericfreeman.jpg?direct&400|}} ((photo by ericfreeman of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/158774-front-rocker-box-motor-mount?t=1699859)) {{:techtalk:ih:engmech:motor_mounts_-_top_1982-1985_by_83xlx.jpg?direct&400|}} ((photo by 83XLX of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/158767-top-motor-mount-for-82-sportster?t=1699851)) \\ |
| === Pics of 77-85 Top Mounts === | === Pics of 77-85 Top Mounts === | ||
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| | L1983-1985 XL-XLX-XLS Top Center Motor Mount ((photos courtesy of Ebay seller, glkase-0. [[https://www.ebay.com/sch/glkase-0/m.html?item=313550768235&rt=nc&nma=true&nordt=true&orig_cvip=true&si=lWYMMEgf2FPnb%252FD1t5Zj%252FSP9jjE%253D&hash=item490115086b%3Ag%3AEVcAAOSwOi9gtj9S&vxp=mtr&_trksid=p2047675.l2562|Link to Items for Sale]] )) ||| | | L1983-1985 XL-XLX-XLS Top Center Motor Mount ((photos courtesy of Ebay seller, glkase-0. [[https://www.ebay.com/sch/glkase-0/m.html?item=313550768235&rt=nc&nma=true&nordt=true&orig_cvip=true&si=lWYMMEgf2FPnb%252FD1t5Zj%252FSP9jjE%253D&hash=item490115086b%3Ag%3AEVcAAOSwOi9gtj9S&vxp=mtr&_trksid=p2047675.l2562|Link to Items for Sale]] )) ||| | ||
| |{{:techtalk:ih:engmech:motor_mount_-_center_l1983-1985_xl-xlx-xls_pic1_by_glkase-0.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_-_center_l1983-1985_xl-xlx-xls_pic2_by_glkase-0.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_-_center_l1983-1985_xl-xlx-xls_pic5_by_glkase-0.jpg?direct&300|}}| | |{{:techtalk:ih:engmech:motor_mount_-_center_l1983-1985_xl-xlx-xls_pic1_by_glkase-0.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_-_center_l1983-1985_xl-xlx-xls_pic2_by_glkase-0.jpg?direct&300|}}|{{:techtalk:ih:engmech:motor_mount_-_center_l1983-1985_xl-xlx-xls_pic5_by_glkase-0.jpg?direct&300|}}| | ||
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