I have about 500 dollars to spend on my stock 2000 400ex and what is the best way to spend it. I want to get it bored witch is 30 and a piston for 100 what else should i get and is the supertrapp ids2 any good thanks

 

I would get a cam next. If you get the one from GT Thunder it will give you 2 more horsepower. It will cost about $160. I think all the slip on mufflers are the same as long as you get it jetted right. I like the IDS because it is quieter than most.