i have 2 polaris trailblazers one is a 96 and the other is a 01 i bought the 01 for my son and i rode it and it was fun i have 325 trailboss i shopped around on cg and found the 96 both are stock but the 96 is a lot more peppier than the 01 and it upsets my son, i noticed the muffler has about 8 holes drilled in it can u guys give me some inexspensive tips thanxx.

 

cut the tube that goes down into the air box so that its only about an inch long...allows motor to draw in more air that way....you may end up having to play with the carb settings to get the fuel/air mixture right after that.
you could get a new spring for the drive clutch. i would call a guy named rick ritter and tell him what the machine has already and what you want it to do. he will recommend/sell you the spring that will get it done.

 

I would start by checking the compression on the 01.Need 100+ to run good 120 to run top.If that is good put in a clutch spring from a 400 Scrambler