[paul23]

Hey guys, just bought and rode my 99 mxz 600 today and its not up to par. Doesn't seem to want to pull very hard and spins whenever I hit the throttle. Looks like a kid studded the track with little knowledge of what he was doing. Has a 4,4,3,2,2,2,2,2,2,4,4,3... stud pattern. I'll probably end up redoing them but my problem for now is I'm only getting about 70 mph if I'm lucky out of it. This is with the 3 pins set on the 4 setting. Adjusted to the 3 setting and top end went down as well as the lil pull that it does have. So went back to the 4 setting and it seems to only rev up to 7200 rpms at top speed. What could be wrong with this sled. Very disappointed in it. I weight about 180 and will end up playing with it again tomorrow. Looking for ideas. thanx

 

[97mxz670]

Check your main jet!
other than that sounds like a clutch adjustment or a bad belt