Please read my first post. After the head and muffler I changed the gearing from 48 teeth to 44 teeth, top speed indicated increased to 125 kilometer, dropped the handlebar down atop the fork the little it would go down, shortened by about one inch the rear brake lever and the shift lever, then the parking stand by two inched. Cut the handlebar about two inches each side. Changed to a platinum v tip plug and eight mil sparkplug cable. Took off the silver grab rails. The cleaner tail section and the cut/down seat make it kind of look like off/road drag bike.