This is a bike I built to race a fellow motorbicyclist , not much to it basic bolt on parts and a few bucks,, so my first build was the punisher kit complete with bike and wow like a new toy,, but so to the laws of nature and wear and tear I've taken the motor after I broke it ,the rings seized, anyway it's a zeda 40mm crank so high pin piston with the skirt trimmed up for intake ported polished cylinder hi top gt6 head acceell hi suppression 8mm silicon spark plug wire with the stock cdi BIG DIFFERENCE for sure Ngk plug ,21mmpwk with power jet works wonders mags so no more broken spikes