Jake.B
New Member
Hey guys, i have a build i'm going to start later this summer. I'm trying to get everything squared away. My main problem is the correct roller size on the drive shaft. I have an 80cc chainsaw i'm mounting to my 20 inch bike. The full weight including the motor, my self, bike, and extra weight for mounting is probably around 200 pounds give or take 10 pounds. I want mainly speed, a little torque just so it doesn't take me forever to hit top speed. I want to accomplish the best gearing possible. I understand its trial and error, but i figure the better i start out with the easier it will be to achieve. It will be pedal start, no clutch so i don't need torque for take off. Its all flat land so no hill climb torque needs to be factored in. At first i was thinking 1 3/8 but then i was suggested 2 inches? what do you guys think will be the best size?