well, the karts mostly done, i need to run heat cycles and put in some antifreeze and figure out how to bleed the head of air which i was hoping someone on here would have an idea? any help? and just saying, i would not recomend building any 500cc shifter kart, mabey an off road kart would be okay, but everything about this kart is difficult, when bump starting it needs to be towed by a car or 4 wheeler, just cant push it fast enough to get it to turn over and when it does go its so **** fast that unless you have several hundered feet of strait road its almost pointless, but its one hell of a few seconds. the acceleration is absolutely the most brutal i've ever experenced, and i've riden in a lot of muscle cars like a 650hp chevel. it is insane and i cant even rev it yet because its all rebuilt motor. If anyone reads this whos looking to build a shifter kart, use a 125 or 250 at most. 500 is just too **** much, and i'm a total adrenalin junkie and for me to say that is alot. I'll post pictures and hopefully video soon.