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Old 07-02-2008, 04:32 AM   #99
Bike#8
Gnarly Adventurer
 
Joined: Feb 2008
Location: Socal=Mt. Laguna & Palomar Mtn.> Now in Idaho Yea!
Oddometer: 173
First time I took sprocket off it was kinda tough, it was on there tight. I jack the bike up to comfortable working level, remove 3 bolts on front sprocket cover (8mm). Lower bike back down so wheels are weighted (by me leaning over bike from left side to put my weight on it), loosen front sprocket bolt (14mm? from memory) and rear axle bolt (26mm), to provide chain slack. Lift bike back up to work on it. BTW, I've been swapping between 14, 15, and 16 tooth front sprockets. I have the speed vs rpm charts made up if anyone wants me to post them. Or you can go here...

http://www.cosportbikeclub.org/misc/SpeedCalc.html

to calculate them your self. The BMW manual has all the data you'll need to input.
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