Right now its just a stock GPX outer rotor kit. The other reason i think i blew my last stock head was because the track was just at that awful point where you don't want to shift form second to third because you will down shift in like 2 seconds, but you feel bad if you don't because your bike is crying a little haha. I need to mess with my sprockets so i have a taller gearing that doesn't work my bike so hard, I don't like it anyway.
I think now that i have a better quality head I will be okay
I also have TI retainers, will that help with anything at all or are those just "trick" parts