>From: "SportBikes Canada" msportbikes.TakeThisOut@yahoo.com
>whats involved in changing a front sprocket.. is it easy... or should I have a
dealer do it for me?
After you've done several jobs yourself, you'll know whether you've got the
necessary mechanical talents to
try more difficult jobs...
If you're going to be a do-it-yourselfer, you need a Yamaha shop manual, or, at
least a Chilton, Clymer, or Haynes manual...
You'll need to support the rear wheel off the ground with a swing arm stand,
and you'll have to at least remove the lefthand lower fairing so you can get at
the front sprocket cover, which must be removed...
The shift lever probably has to be removed to get the sprocket cover off. Put
the bike into high gear before you
remove the lever and the cover...
Then you can bend the ears of the sheetmetal washer under the sprocket nut (a
hammer and flat-bladed screwdriver will to the job) so you can get a socket
wrench onto the nut. You'll need a fair sized ratchet wrench and extension or
breaker bar and extension to loosen the nut, and you'll need a torque wrench to
re-install the nut...
The torque is probably about 43 foot-pounds---but check the manual to be
sure...
When you're ready to break the nut loose, stick a 2-foot long piece of 2 X 4
through the rear wheel's spokes, above the swing arm, to keep the rear wheel
from turning...
Or, if you have a friend to help, have him step on the rear brake pedal...
Then, use your breaker bar and socket to loosen the front sprocket nut. After
the nut is removed, loosen the rear axle and the rear wheel adjusters, and push
the rear wheel all the way forward to take tension off the chain...
Then you can slip the chain off the old sprocket and install your new sprocket.
You might want to clean all the road grit and grease out of the area before
putting the new sprocket on...
When you want to tighten the nut, move your 2 X 4 underneath the swing arm and
through the spokes, or have your friend step on the rear brake pedal again...
The recommended torque for tightening the sprocket nut will be found in the
shop manual...<!-- ~MESSAGE_AFTER~ -->
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