Jump to content
Sign in to follow this  

Jetting problem

Recommended Posts

Hello,

I have a problem i can't work out, wonder if anyone can help? I have a japanese import 92' RMX250SR, as standard it is restricted with a 30mm carb. I got the manifold, reeds and Mikuni TM38 off a full power rmx, fitted a FMF exhaust, replated cylinder, piston and new gaskets. bike starts well but can't seem to get pilot jet right. I have drilled into the manifold to keep the autolube, so I think the jetting should be slightly lower than for a standard (premix) RMX. standard pilot is 45, I fitted 42.5 and it starts fine but airscrew has little effect and bottom end is a bit rubbish. kept going down in pilot and it ran better with a 32! which i think is too small. I have set slide to 0.7mm gap, float height to 16mm, and still plug is pretty black. I think fuel is leaking somewhere, so i replaced needle with new one. could needle jet be worn? I don't know how to remove it to replace/check it.choke doesn't seem to be leaking. Also i have a Trailtech vapor with tempreture sensor on it which is located in the hose coming off of the head, it doesn't register till 45degrees and never registers! I believe the two things are linked, ie to much fuel cooling the combustion chamber. sorry for long post, just tried to include everything, any idea's?

Thanks,

Richard

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Reply with:

Sign in to follow this  

×
×
  • Create New...