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| techtalk:ref:priclutch06 [2020/06/21 06:44] – [34T to 38T Engine Sprocket Conversion] hippysmack | techtalk:ref:priclutch06 [2024/01/19 23:40] (current) – hippysmack | ||
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| ====== 34T to 38T Engine Sprocket Conversion on 1992 XL883 Deluxe | ====== 34T to 38T Engine Sprocket Conversion on 1992 XL883 Deluxe | ||
| + | Article by bval of the XLFORUM ((https:// | ||
| - | {{:techtalk: | + | 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.|| | ||
| + | |{{: | ||
| + | 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" | ||
| + | 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| | ||
| + | |{{: | ||
| + | |Installed pics||| | ||
| + | |{{: | ||
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