What is the main jet size on a stock yfz450? I have noticed that i am running "flat" at the last 1/8th of the
throttle and would like to go up a jet size or two.
Or am I running up against the rev limiter and should leave the main jet alone?
Originally posted by V-Quad@Aug 22 2003, 10:53 AM stock main is 158
the quads come lean from the factory so i doubt your hitting the rev limiter
yes ,jet up!!!
Main jets 155,160,162,165
pilot jets 40,45
1 needle
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