i need 2 no what all can i do to this? ive found a jet kit and a air filter dose anyone make a exhaust? i no these 4 wheelers r hard to tear up. what are some little tricks i can do to it to make it run better?

 

can anyone help me

 

cobra makes a full exaust system

 

which fourtrax are you talking about, the utility quad?
You can do all the stuff to a 300ex fourtrax as with a 400ex, which people seem to modify in a regular basis. They've been making the 300ex twice as long, just open up a parts catalog and take a look for yourself. Basically, anything you can do to a 400ex, you can do to a 300ex, but cheaper.

 

the utility is what im talkin about