yz125

[ThrowinRoost89]

it was stock, so now im trying to figure out what a good base line for my jetting...


it now has

gytr filter
pro circuit pipe, stock silencer
athena works top end.....


im just not shure where to start with the jetting.

[MX86]

well the pipe and silencer will require one jet size, the top end (i'm assuming) will raise the compression so there's another so i'd go up 2 mains to start and run 32:1