Sign in to follow this  
Followers 0
Shane_Bettin

runs like [@#$%&*!] down low?

4 posts in this topic

well i took my bike for a rip today after sealing the airbox. the only problem i had was when the throttle was at a steady 1/4 or so opening the engine would sputter and feal like its gonna stall. does the pilot affect this part of the throttle range? i put a 45 pilot in it before because it was lean from my leak, but now that fixed so could that 45 be giving it to much fuel at that opening?

thanks

shane

Share this post


Link to post
Share on other sites

What kind bike are you riding?How many turns is the pilot screw out?How big is the main jet?Elevation?

Share this post


Link to post
Share on other sites

its a 99 yz400f. 182 main, 4th or 5th clip (can't remember), 45 pilot, 1 3/4 turns out. around 0 degrees celcius, between 300 and 1300 feet above sea level.

Share this post


Link to post
Share on other sites

Before you do any tuning, clean out the carb really good. Make sure it's clean.

You're right in the throttle range where the pilot jet and fuel screw can make a large difference, that is where I would start adjusting. Try to tune it out with the fuel screw, and if that isn't enough adjustment then start swapping pilot jets.

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

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0