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techtalk:ih:engmech01c [2018/09/08 03:29] |
techtalk:ih:engmech01c [2021/11/18 20:43] hippysmack [Engine interchangeability] |
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+ | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
+ | ====== IH: Engine Mechanicals - Sub-01C ====== | ||
+ | ====== Ironhead Engine Case Identification ====== | ||
+ | \\ | ||
+ | ====== 1957-1971 Cases ====== | ||
+ | |||
+ | ===== Short Frame vs Long Frame ===== | ||
+ | |||
+ | Short frame motors are 1957-1966 XL / XLH and 1958-1969 XLC / XLCH. \\ | ||
+ | Long frame motors are 1966-up XLH and 1970-up XLCH. \\ | ||
+ | |||
+ | All sportsters 1957-1966 were virtually identical in design. So most parts thru that period do interchange seamlessly. \\ | ||
+ | The differences that do exist are easy to deal your way around. \\ | ||
+ | The 1967-1969 CHs were also of part of that original design. \\ | ||
+ | The XLForum seems to have adopted the term 'short frame' to describe the 1st generation bikes. \\ | ||
+ | (because their frames were shorter than the 2nd generation "long frame" bikes that came into being to hold all the electric start stuff in 1967) \\ | ||
+ | 1967-1969 XLH was not 1st generation design though many of these second generation parts will retro-fit to the 1st generation design bikes. \\ | ||
+ | Some don't make that an easy task as they are similar but not the same. ((Dr Dick of the XLFORUM DR DICK http://xlforum.net/forums/showpost.php?p=4673358&postcount=14)) \\ | ||
+ | |||
+ | ===== Engine interchangeability ===== | ||
+ | |||
+ | 1967-1969 XLCH are the same as the bikes that came before (short frame) but the 1967-1969 XLH are different (long frame). \\ | ||
+ | All 1970-up bikes used the long frame. \\ | ||
+ | From 1967-1969, there were two sportsters; Short XLCH and Long XLH. \\ | ||
+ | The electric start "hump" engines will bolt directly into kick only frames. \\ | ||
+ | What won't bolt on from there is the matching e-start accessories (oil tank or battery box). ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1780075)) \\ | ||
+ | The e-starter is well forward of the seat tubes. You may have to do a slight amount of clearancing for the aluminum starter housing. \\ | ||
+ | Or just run kick only and make it real simple. \\ | ||
+ | If swapping early motors into 1977-newer frames, just remember to use the front and rear mounts for the year the frame is. ((bobber58 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1857474&page=2)) \\ | ||
+ | |||
+ | To power the starter, a giant battery was required. \\ | ||
+ | To make room for this, the rear frame down tubes were offset to the rear with a "dogleg" and now the frame got longer than the original. \\ | ||
+ | The original is a "short frame" and the doglegged version is a "long frame". \\ | ||
+ | See the long frame (dogleg) in the pic below. Note the position of the down tubes to the motor mount surface. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1028933&page=2)) \\ | ||
+ | |||
+ | {{:techtalk:ih:body:1967_and_1971_seat_post_comparison_-_composite_of_pics_from_ebay_sellers_animalhouse2010_and_rusty_dusty_motorcycle_parts.jpg?direct&400|}} \\ | ||
+ | |||
+ | |||
+ | ===== Short frame cases ===== | ||
+ | |||
+ | In 1952, the K model was introduced. This was a brand new design for HD. \\ Between 1952 and 1976, that basic bike slowly evolved. \\ | ||
+ | It was built on the same "mechanical DNA" and lots of stuff directly interchanges between a 1952 and 1976. \\ | ||
+ | In 1977, the basic design changed. Fitting a 1977 engine into a 1976 frame requires mods to the frame. \\ | ||
+ | The F model flatheads (side valve in factory speak), from 1952 to 1956, the bike changed each year. \\ | ||
+ | But the changes were evolutionary rather than revolutionary. You could pretty easily put 1956 stuff on your 1952 and vice versa. \\ | ||
+ | |||
+ | In 1957, the OHV XL came along. This new engine was fitted to the same basic frame. It was still the same bike for the most part. \\ | ||
+ | You could put the OHV engine in the flattie frame and vice versa. Same in 1958. Basically one bike so far. \\ | ||
+ | |||
+ | In 1958, the factory took that basic bike and introduced a new model along side the XLH, the XLCH. \\ | ||
+ | The XLCH is the same motor and frame and everything bolted on is just stripped down but still the same bike. \\ | ||
+ | These two models, linked at the hip, were produced until 1966. \\ | ||
+ | 1957-1966 (all) and 1967-1969 (XLCH) are kick start only. \\ | ||
+ | |||
+ | The left picture below is a 1964 XLCH left case. It can be used on any short bike. \\ | ||
+ | Notice the 4 blue and 3 yellow circles drawn on the picture. \\ | ||
+ | On 1958-1969 XLC / XLCH, these are all tapped holes for the primary cover. \\ | ||
+ | On 1957-1966 XL / XLH, the holes at the yellow circles are not drilled or tapped and the holes at the blue circles are not tapped but have 3/16" dia roll pins. ((Dr Dick of the XLFORUM DR DICK http://xlforum.net/forums/showpost.php?p=4673358&postcount=14)) \\ | ||
+ | The right picture below is of a 1960 XLH left case. \\ | ||
+ | In this case you don't have all the screw holes needed for the tin primary cover used on 59-69 CH. \\ | ||
+ | You'd need to use the 3 hole sportster cover or pull the pins and drill and tap to convert to tin cover. \\ | ||
+ | |||
+ | Click on a pic to enlarge: \\ | ||
+ | |||
+ | | Short frame left case for XLCH ((photo by Dr Dick of the XLFORUM http://xlforum.net/forums/showpost.php?p=4673358&postcount=14)) | Short frame left case for XLH ((photo by sevenyears of famine of the XLFORUMM)) | | ||
+ | |{{:techtalk:ih:engmech:1964_xlch_left_case_by_dr_dick.jpg?direct&400|}}|{{:techtalk:ih:engmech:1960_xlh_left_case_by_sevenyears_of_famine.jpg?direct&400|}}| | ||
+ | |||
+ | | Cases from a 1965 XLCH (short frame) ((photos courtesy of Ebay seller, chezyrydr. [[https://www.ebay.com/sch/chezyrydr/m.html?item=114957642341&rt=nc&nma=true&nordt=true&orig_cvip=true&si=zOYpPKkEiEnNnFiXOFT6Zq890Gs%253D&hash=item1ac4026a65%3Ag%3AToIAAOSwrtdhKV-y&vxp=mtr&_trksid=p2047675.l2562|Link to Items for Sale page]] )) || | ||
+ | |{{:techtalk:ih:engmech:1965_xlch_900_case_pic1_by_chezyrydr.jpg?direct&400|}}|{{:techtalk:ih:engmech:1965_xlch_900_case_pic2_by_chezyrydr.jpg?direct&400|}}| | ||
+ | |||
+ | ===== Long frame cases ===== | ||
+ | |||
+ | Then it happened. \\ | ||
+ | In 1967, a mutation in the DNA resulted in the 1st change away from the original design. \\ | ||
+ | Electric start was offered on XLH. A "hump" was added to the left case casting above the tranny. \\ | ||
+ | It was decided to put the electric starting components behind the rear cylinder mounted to the crankcase above the new case "hump". \\ | ||
+ | New (XLH only) "hump cases" with "long frames" were made to accept the new starter. \\ | ||
+ | The 1967-1969 XLCH was unaffected until it also succumbed in 1970. \\ | ||
+ | 1967-1969 (XLH) and 1970-1976 (all) are electric and / or kick start. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1780075)) \\ | ||
+ | |||
+ | On long frames, mechanically speaking, 1967-1969 (XLH) and 1970-1971 (all) cases interchange. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1028933&page=2)) \\ | ||
+ | Cosmetically speaking, only 1967-1969 XLH cases are identical. \\ | ||
+ | |||
+ | |||
+ | ====== 1972-1976 Cases ====== | ||
+ | |||
+ | ====== 1977-1985 Cases ====== | ||
+ | |||
+ | |||
+ | |||
+ | \\ | ||
+ | |||
+ | [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | ||