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Discussion Starter · #1 ·
I bought this sprocket to improve gas mileage and lower the revs while cruising but never installed it. It will gear up the FZ09 by 6.3%. It is a Superlite 525 pitch chromoly steel drilled for lightness, part number 21607R-17, brand new in original case. $35 and will ship free to lower 48.
 

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Discussion Starter · #3 ·
Yes, but you have to trim a thin rubber rib on the inside of the cover. It's about 1/8" wide and just touches the chain with the larger sprocket.
 

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The guide it hits is a separate piece from the cover, the cover can be reinstalled without it if you don't want to trim it
 
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