Jump to content
Sign in to follow this  

pilot screw

Recommended Posts

Hello,

07 TTR125L. I'm cleaning the carb. After taking off the bowl, and directly in line with the main jet and pilot jet is the pilot screw (according to yamaha's schematic). It has a spring and a couple gaskets for the screw.

Anyone know how the screw is seated? It having a spring doesn't make it look like you just tighten the screw all the way down.

Thanks

Share this post


Link to post
Share on other sites

You don't want to tighten it down tight. That is used to mix the air/fuel ratio on start-up to about 1/4 throttle. If you screw it in (tighten) you allow less fuel (lean out mix), if you screw it out, you allow more fuel (richen the mix).

If you are having trouble with cold starts and want your warm-up times to be quicker, you would screw the pilot screw in until it is slightly snug (do not over tighten), then back it out (full turns) until you find your sweet spot. If you need to screw out passed 3.5 full turns, I would go up one on your pilot jet....:smashpc:

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...