Motorcycle Forum / General / Yamaha / May 2007

there is a problem? you are sure it needs rejetting?
if there is need, ask maker first.

Most riders jump into carburetor tuning blindly and wind up with a lot of
problems resulting from their assumption that a carburetor kit is just a bolt
up fix for a problem. The "easy" fix can turn into a bucket of worms.

People will say, "Oh, the first thing you need to do is select a main jet".

That approach can run into spending lots of money if you have no idea how
main jets are sized.

You can google up my extensive comments on Usenet if you google for "round
jet" and for "EPA anti-tamper plugs".

I don't recommend installing a jet kit unless you really know what you're
doing, and then I would steer clear of Dynojet kits completely. You might
want to read up on carburetors at the Factory Pro
website.