sprocket swap for roketa with lifan motor

[kmanharp]

hi guys merry christmas got my roketa doing good with lifan motor what size sprocket do i need to lower rpms i stock back sprocket and stock one on lifan motor kman

[Weldangrind]

Any increase in countershaft sprocket size or decrease in rear sprocket size will decrease cruise RPM, increase top end speed (to a point) and reduce low end grunt.

I'd simply start with one tooth larger countershaft sprocket, primarily because it's easier and cheaper to replace. Also, you might not need to alter your chain.

[Ranbo]

Here is a link to the sprocket I got. I found them on this forum.

[/url] http://shop.clevelandcyclewerks.com/ [url]

I think my counter shaft sprocket is a 16 tooth.
I have a 428 chain. This set up works great for me both on road and off road. My GY200 with pushrod engine has plenty of low end torque and will top out at about 70 MPH