Hi, my suzuki ay50 katana 2003 wont go faster than 20MPH,, it had a 70cc big bore kit and that blew up so i put a standard 50cc barrel and piston back on it. i have changed the jets and rollers back to the standard size, i have a leo vince tt exhaust so surely it should go a little faster than a standard 50cc. can someone please help me and give me ideas on what i can change to make it go more than 30mph cause riding at 20mph is quite dangerous would appericate any thoughts many thanks SK
