Oily tailpipe

[Mad Max]

I have a 2001 KDX200, installed a FMF pipe and turbine core 2 silencer. Man, what a difference in the performance but. I was instructed to check my jetting as the bike may run leaner here in Texas so I did high speed and low speed shut downs with a inspection of the plug. It appeared to be running very lean as the plug looked ash white. So I stair stepped from a 160 main jet to a 165, 170 etc until I got to a 185. Performance was just as good but oil everywhere, all over the back fender, dripping from the pipe and leaving a small mound of crud on the swing arm dripping from where the pipe joins the silencer. Should I be concerned about this? Am I missing something here? I noticed that with the stock pipe and stock jetting that it also made a bit of a mess but not this bad. I am not fouling plugs and I went to the FMF website to see what they had for settings with my bike and their pipe set up and it had instructions to change my main jet from a 160 to a 155! I am not fouling plugs and the bike runs good. Is anyone else having this type of experience that can shed some light on it?

Thanks!

 

[Bob Tiley]

Sounds way to rich - I would go back to the 160 jet and check the plug again after some riding.

 

[Mad Max]

Thanks for your input, I surfed some more of this forum and found additional information regarding this topic that I didn't find initially. I think you are right, I am going to be sure I am not running to lean as to not burn up my piston and let the oil fly where it may. Who knows, in my next race if I am lucky enough to have someone behind me it could prove to be beneificial in that it could mess up the goggles of the unlucky rider ;) I guess I will just deal with it.

Mad Max

 

[MikeT]

Ya, if you started with ash white and ended up with oil coming out you need to find a happy medium somewhere in the middle. Take your time but remember, it's safer to be a little rich. Don't forget, as it gets cold your bike will tend to become lean.