It's Chain & sprocket time.. So I'm looking at changing the XTR to 525 sprockets & chain..
After doing a bit of checking sprocket dimentions it seems that the
Yamaha TDM850 525 sprockets will fit the XT660... "R6 engine sprocket"
Just a long shot but dose anyone know for sure if they will fit...

And yes I do know I can buy a 525 kit from the other side of the planet...
But they are not in the gear ratio I run.. (14 or 15 / 48)

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Harley Davidson..
The easyest way to turn gasoline into noise with out the side efect of horse power...