Parts catalog for the 57cc 4-stroke Kayo KMB 60 pit bike. The Kayo KMB 60 features a 56.8cc, air cooled, 4-stroke motor with a fully automatic transmission and electric start. It's designed to be a beginner's bike. It's light weight, just 92.5 pounds, and the seat is just 22 inches off the ground. It features disc brakes on both the front and rear wheels. Ten inch wheels give the KMB 60 almost 7 inches of ground clearance.