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
jespertheil

YZ426 no power in the top..

2 posts in this topic

I have a 2001 yz426 and just installed a Wiseco 13,5:1 piston and a DR.D complete exhaust.

The bike runs great, no shooting or anything and great buttom 2 stroke wannabe snap.. The only problem is that at higher rpms it has no power.. :cry:

My jetting is 162, 72, 42 with needle in 4. clip. I tried to raise the needle one clip, but that made it run like crap.. I race at sea level, 10deg cel.

Always clean filter.

What´s my problem???

Share this post


Link to post
Share on other sites

Hello Jesper, I think you are on right track, obviously it cannot get enough fuel. Try a larger main jet and open the fuel screw a quarter turn. Besides being at sea level it is quite cold already there also, we have today -8 C. You are rich on oxygen.

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