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techtalk:ih:engmech09 [2023/12/27 20:43]
– hippysmack |
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techtalk:ih:engmech09 [2023/12/27 21:08] (current)
– hippysmack |
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| * [[techtalk:ih:engmech09j|Lower Front Motor Mount Bolt Sizes and Lengths from Parts Catalogs]] |
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|1957-1981 style lower front motor mounts. ((photos by bustert of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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|}}| |
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|1982-E1984 lower front motor mounts / filter mount. (left shown) ((photos by DirtyCory of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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|}} |
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| **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. \\ |
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 httphttps://www.xlforum.net/forumsforum/showpost.phpsportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/173033-top-motor-mount-nut-and-bolt?p=5079143&postcount=8#post3703399)) ((httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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 changed in L1971 and again in 1979 but the part number stayed the same. \\ |
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| |{{: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|}}| |
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| 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 httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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|}}| |
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| \\ |
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| ===== 1977-1985 top mounts ===== |
| **Note**: \\ |
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| * **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 top front bracket (16265-76) is an "L" shaped piece (app. 1/8" thick) ((ericfreeman of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.php?p=4631039sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/158774-front-rocker-box-motor-mount#post4631039post3372910)) 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 httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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 httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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. \\ |
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| Click on any pic to enlarge: \\ |
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{{:techtalk:ih:engmech:motor_mounts_-_top_1977-1981_by_ericfreeman.jpg?direct&400|}} ((photo by ericfreeman of the XLFORUM httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-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 httphttps://www.xlforum.net/forumsforum/showthread.phpsportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/158767-top-motor-mount-for-82-sportster?t=1699851)) \\ |
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| === 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]] )) ||| |
| |{{: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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