I am very pleased with the stage 3 high compression piston and tune kit, I also upgraded my clutch and the bike is noticeably quicker in the middle of the rev range. I would definitely recommend this to anyone with the cam/tune package
Went with this clutch kit after the stock one was starting to slip. We're pretty hard on the clutch since we use the Grom for MiniGP and this clutch and it seems to hold up pretty well. Already have a 4 hour endurance race on it and it didn't hesitate at all. It was cheap, easy to install, and got the job done. Super quick shipping too!