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

has anyone ever checked the accel pump spray pattern on 98/99's?

3 posts in this topic

I have not. Studying my carb last night, I have come up with a potential fix for the 98/99's. The P38 fixes the diaphragm stroke by giving you a set screw that acts on the underside of the diaphragm. James Dean has recommended drilling, tapping, and using fiber washers w/ adjustment screw, making your own P38 on the stock diaphragm cover.

If a new AP cam (or sleeved adapter) was machined, an adjuster could be integrated to allow the TOP of the actuation rod to be raised or lowered to change the spray timing of the AP. It would be a trial and error to first set your timing, then the (P38) could be adjusted.

If the chance arises for me, I will try to get one of our machinists to make me one. This could very likely be a winter project. First dibs on the patent!! :)

Open to comments, questions...


'99 WZ/YR (you choose!) with ALL YZ mods, de-octopused, DSP Doug Henry airbox w/ velocity stack, FMF PowerBomb header, Stroker SX-1 silencer, SS front brake line, OEM YZ tank, IMS YZ seat.

[This message has been edited by NH Kevin (edited September 11, 2001).]

Share this post

Link to post
Share on other sites

Kevin, Just to let you know, I am still walking. Severe bruise and a loose knee joint. Had a ball until the TREE. It was a pleasure to meet you. Ron S

1 person likes this

Share this post

Link to post
Share on other sites

Pleasure was all mine, Ron. MTrip told me he was there!

I e-mailed you at home. My available dates are the last 4 Turkey Runs:

New Boston, MA

Winchedon, MA

Central Village, CT (my old stomping ground!)

Taunton, MA

Now, Ron, disconnect that bogus octopus. You do have to go w/ the YZ's 100 air jet though.

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