I have 2 honda groms. 1 i am keeping stock for friends/family to ride and use for comparison. the other 1 i have a full yosh pipe and removed little airbox snorkel. I am looking to do a top end kit. I want it to be fast and fun, but it is very important to me that it stays reliable. has anyone had luck with a nice clean big bore top end kit? any help would be greatly appreciated.