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Old 29-05-2020, 01:32 PM   #3
Darkness
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Join Date: May 2007
Location: Stockbridge
Bike: M900
Posts: 1,984
If you check out the parts fische for the M900 (Which doesn’t have tacho drive installed) and 900SS (Which does), the difference is that a spacer has been installed instead of the worm drive. It’s a bit of a faff swapping them over as you need to pull a cam bearing out of the way. Worth checking if there’s already a worm drive there though.
I looked at this some time ago, but it seemed too fiddly for a tacho that the bike doesn’t really need. You of course may decide otherwise for yours.
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