I run it very hard when i am by myself. Also i have rebuilt my carb and verified that it was stock jetting. It was not stock jetting from previous owner. I dont assume anything is correct unless i check myself. I was told it was rebuilt when i got it. I have seen many of rattle can rebuilds in my day. i cringe every time i hear that. 20 minites later it burned as hole in piston from bad crank seal and jetting was lean enough to get the job done even if the crank seal would have been good with me mixing at 32:1