View Full Version : Help with a rich runner

04-30-2004, 07:54 PM
So my engine is running a little rich it seems like. I pulled the spark plug and it was oily and black and all that jazz. How would I go about leaning it out a wee bit?

04-30-2004, 08:29 PM
if you premix in some extra oil that will lean out the A/F ratio a little bit but your best bet is to go down a size or two on the main

04-30-2004, 10:09 PM
The main what precisely?

04-30-2004, 10:17 PM
The main jet on the carbeurator.

remove the tank, take off the airbox, and pull the carb off. Turn it upside down and there will be a black bowl held in by four screws. Remove these, and be careful not to rip the gasket when lifting the bowl. There will be a little screw looking deally bop in the middle (the main jet). Merely take off and replace with a smaller one. (n the top there should be a number, so you'll know which new jets to buy).

good luck

04-30-2004, 10:48 PM
All right, that's what I figured. But thanks for the in-depth reply.