Yamaha RD50m Caferacer - Fast 50cc

Yamaha RD50m Drive by video, top speed in the video is around about 100 km/h. I can't keep the moped full throttle for too long, because of the poor thermal characteristics. When solved the top speed should be 120 km/h. Specifications: - Homemade sleeved barrel, with 5 intake ports, 3 exhaust ports. - Malossi Piston, now changed to Modified Barikit piston from EMOT racing for more intake area. - Homemade interchangeble copper head. - Exhaust DPR custom - Intake Dell'orto 21mm