shorty49659
Member
- Jan 19, 2006
- 3
- 0
Hey all, My name is Dave. I just bought a new 2004 yz125 last year, It has a fmf factory fatty and titanim 2 silincer. The jetting is still stock and i heard you should change it when you add an aftermarket pipe. I was just woundering if anyone could tell me what size jet i should be using? I live in northern Michigan so the weather in the summer here is normally around 70 to 90 dergees. Thanks