HEADS UP!!!

Site upgrade in progress... Core site functions are working, but some non-critical features/functions will be temporarily unavailable while we work to restore them over the next couple of weeks.

Please post any bugs you encounter, but before you do, check to see if it's already listed.

Thanks for your patience while we work to improve the community.

Sign in to follow this  
Followers 0
250FRider

New 426 Jetting Help

4 posts in this topic

I just finished breaking-in my '01 426 and I have a few jetting questions. First, everytime I started the bike I had to use the hotstart. Does this mean it's running rich? Also, right off the bottom end it felt like it was missing a little bit, almost like it's getting too much fuel. From mid on up it's running awesome. Man this thing is FAST! By the way, I'm riding at about 500ft and the temp. is around 70 degrees. Thanks for the help!

Joe

'01 YZ250F

'01 YZ426F

Share this post


Link to post
Share on other sites

Yes, try turning the pilot screw IN to lean the idle mixture. Check how many turns from bottomed it is also. Do not twist the throttle more than 1-2 times before or during start up.

BTW, the hot start and choke are side by side. No chance you have them confused, is there?

Share this post


Link to post
Share on other sites

I turned in the fuel screw from 1 1/8 to 1 turn out and it made a big difference. It starts first kick now with the choke on. The only problem is it still stumbles just a little bit right off idle. Other than that it's running much better. I haven't confused the knobs yet, but I'm sure I will my first race. :)

Joe

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