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i really don't think a bike chain oparates in a clean enough enviroment for the
tooth count to matter.... the standard gearing on the XT660 is 15/45 3:1
so Yamaha don't think it matter's to much..
In a gearbox for sure but a chain/sprockets no...
chain tension & lubecation have a bigger bearing on chain/sprocket life..
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__________________
09 XT660R ...
06 TTR250 ...
80 Montesa H6 125 Enduro...
77 Montesa Cota 348 MRR "Malcom Rathnell Replica"...
Current resto projects..
81 Honda CT110...
80 Kawasaki KL250A1...
11 Husaburg TE125 enduro... "sold" along with another 31...
Lifan 125 Pitbike.. "stolen" ...
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E-mail... xtpete1@gmail.com
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