Rear sprocket

[Ponch712]

I'm looking for go from a 428 rear sprocket to a 520. Any suggestions

[JerryHawk250]

I'm looking for go from a 428 rear sprocket to a 520. Any suggestions

Welcome to the forum! We need a little more information so we can help you. What is this on?

[Ponch712]

I have a 79 rm250 that I put on a 16 xmoto 250 frame. I was looking to convert the rear sproket to fit the older 2 stroke engine

[rj133]

Lets see some pics . Sounds like an interesting project. What fab work did you have to do ?

[Ponch712]

The pic isn't that good but you kinda get an idea. I will have to mod the exhaust and maybe the rear or front sprocket