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

BK Mod Jetting?

1 post in this topic

Hey Guys,

I recently finished the BK mod on my 01 YZ426F...

I did the best I could adjusting the timing and duration before it got dark and could not see. I road it around a bit and I feel like some changes in jetting are needed. At quick blips of the throttle when not moving the bike dies sometimes so I need to look into that. I also noticed that the pump squirt is pretty weak after setting the duration at around .35, is this normal?

Any ideas on jetting after this mod? My specs are as followed...

Location: Phx, AZ

Elevation: 1200 ft

Temp: 70 to 110

Humidity: >10%

Main: Dynojet 165

Pilot: 45

Leak Jet: Not Sure

Fuel Screw: 3 turns out

Needle: Dynojet needle 2nd Clip


Dr.D Full Exhaust

UNI Filter

Any help would be awesome..Thanks!

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