Just figured i would share this, in case anybody else was considering it. I was surfn ebay last week and i ended up winning a 10.75.1 vertex piston ,stage 1a hotcam and all the gaskets for 100 dollars, all brand new stuff. Only reason i bought it because i got such a good deal.Got it installed today, broke it in ,everything went right. I cant believe how much it woke the quad up, it made a big difference in acceleration that my kid and i can both notice. It also has a louder bark to the exhaust, sounds a lot meaner. Going to play with the jetting more tomorrow. I put a 170 main in place of the 165 i had when i did the install, sputters a little at full throttle at high rpm, might be running too rich. Hopefully i will have it fully dialed in tomorrow. So if anybody is considering a piston and cam upgrade, it is a great choice!!