KymcoForum.com

I recently installed a 70 cc big bore kit on my friends vitality  I  changed the jet to a 95 and put in a cold plug /variator weights/tuned exhaust/clutch springs/ and the problem is i get about 20 minutes of riding out of it and then it just quits leave it sit for a minute and it will start but very hard to start then i can ride again for about 5 minutes and quits again even did it with a 85 jet and problem still there .driving me nuts any help would be just awesome thanks