jetting/spooge/oil mix

[grease]

i have a 99rm125. have been runnin castor 927 in it and is spooging out the silencer a lot. The plug is black every time i take it out, and fouls often. I have been running it at 40:1. I have a 170 main, and 55 pilot. Clip in middle. what should i jet.

 

[02'Cr Rider]

Use an oil as you mentioned,like mx2t ,yamalube,or golden spectro if you like the smell of some what castor.Try running these jetting specs @32:1 mix.

168 main
55 pilot
stock needle @ 2nd from top
air screw @ 2 turns out

Try it out and see if it work,tune from their.

 

[Senior KX Rider]

Originally posted by 02'Cr Rider
or golden spectro if you like

Lots of carbon on your powervalves :p :)