Jetting

[paxfam]

I have a suzuki rm 125 I bought it with a gold series fmf pipe on it. It seems to me that its running way rich cause when I stick my finger in the end of the pipe its like raw fuel almost its like carbon really bad. Plug is like a real golden brown. But it is really dawgy like not alot of bottom end and it wont rev high either. So I am woundering if it needs to be rejetted because the pipe was put on there. If anyone could tell me what jets need to be in there with that pipe I would really appreciate it..

 

[micshol]

check fmf's site

 

[bdtoady22]

yes it would be running rich with a new pipe you move exhaust faster and air in faster and you would think that you need to richen it up but it actually needs to be leaned out and that will solve your problem. how many sizes of jets i dont know but do one at a time untill you get good throttle response and smooth power