Differences
This shows you the differences between two versions of the page.
| Next revision | Previous revision | ||
|
techtalk:ref:priclutch06 [2020/06/21 06:30] hippysmack created |
techtalk:ref:priclutch06 [2024/01/19 23:40] (current) hippysmack |
||
|---|---|---|---|
| Line 1: | Line 1: | ||
| [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{ :techtalk:gototechnicalmenu.jpg|}}]] | ||
| ====== REF: Primary Drive & Clutch ====== | ====== REF: Primary Drive & Clutch ====== | ||
| + | \\ | ||
| + | ====== 34T to 38T Engine Sprocket Conversion on 1992 XL883 Deluxe ====== | ||
| + | Article by bval of the XLFORUM ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/106420-38t-sprocket-conversion-pre-2004?t=956950)) \\ | ||
| + | Bike: 1992 XLH Deluxe 883. \\ | ||
| + | Engine: SE 1200 upgrade kit. \\ | ||
| + | This mod was done in an effort to lower the RPM at cruising speeds on the freeway. \\ | ||
| + | The OEM sprocket has 34 teeth and which was swapped out for a 2004 (Japanese version, Part # 40290-04) 38 tooth sprocket and 2004 (96 link, Part # 40147-04) primary chain. \\ | ||
| + | The front transmission sprocket was already changed to the 1200 (29T) sprocket without a noticeable difference in lowering RPMs. \\ | ||
| + | The sprockets look completely different and are in fact physically different but work extremely well with no modifications other than a spacer. \\ | ||
| + | The 2004 sprocket has 8 mounting holes while the 2003 and earlier only have 4 holes. \\ | ||
| + | The overall depth of the sprockets are different so you need to use an additional spacer between the sprocket and the spacer or race that's already there. \\ | ||
| + | That way the chain lines up right between the clutch sprocket and engine sprocket. \\ | ||
| + | |Mounting the 8 hole sprocket to the 4 hole rotor is not an issue. \\ 4 holes in the rotor assembly line up perfectly leaving 4 holes empty in the new sprocket.|| | ||
| + | |{{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic1_by_bval.jpg?direct&300|}}| {{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic2_by_bval.jpg?direct&300|}}| | ||
| + | |||
| + | You can see below that the part that presses onto the rotor (which is also the offset so the sprocket line up with the clutch sprocket) is a different depth. \\ | ||
| + | So this was the need for the spacer (.085") to get the sprockets to line up. \\ | ||
| + | Machined bushings at OSH (Orchard Supply Hardware) measuring 1-1/4" O.D. and 1" I.D.. \\ | ||
| + | The O.D. and I.D. was the exact size of the spacer/race that's already on the crankshaft. \\ | ||
| + | They all varied a little in thickness but, out of several purchased, 2 were found that were .043" to make the needed thickness. \\ | ||
| + | |||
| + | |Comparing the two sprockets|Shims (bushings) added|Sprockets lined up| | ||
| + | |{{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic3_by_bval.jpg?direct&300|}}| {{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic4_by_bval.jpeg?direct&300|}}| {{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic5_by_bval.jpg?direct&300|}}| | ||
| + | |||
| + | |Installed pics||| | ||
| + | |{{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic6_by_bval.jpg?direct&300|}}| {{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic7_by_bval.jpg?direct&300|}}| {{:techtalk:ref:priclutch:34t_to_38t_front_primary_sprocket_conversion_pic8_by_bval.jpg?direct&300|}}| | ||
| \\ | \\ | ||
| [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | [[:techtalk:menu|{{:techtalk:gototechnicalmenu.jpg|}}]] | ||
