On the drive side? I was going off the below:
https://www.mopedarmy.com/forums/read.php?6,3968229
https://www.mopedarmy.com/forums/read.php?6,3935990
https://www.mopedarmy.com/forums/read.php?1,3963713
I saw some people running 420. Does it require modification? I can try 415 though, I just can't return the 420 as I used a chain breaker.
Thanks for the advice! I can just pick up 415 if it meshes with the teeth of the front sprocket