comet clutch’s

Has anyone ever used one of these clutch’s before and know anyone who has? How did they preform? I am wanting to wake up my girlfriends bike up a little. She has a 2006 polaris hawkeye 300. Its nothing special. But im wanting to get her a little bigger tires, stock it has 22×10 rears and 22×7 fronts. I dont remember the rim size. Im thinking of going with something in the 25 range more of an aggressive trail tire. she isnt into the mud as much as i am. Here is a link to ebay of the clutch and for the money i wondering if its worth it?? I wish you couuld get a QSC set up this cheap.…ba6888&vxp=mtr