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
superdog

Weak Accelerator Pump

3 posts in this topic

I have a 2000 WR400. And like a lot of them as it seems, when I whack the throttle open from low rpms, it justs wants to die. I have read many of the post on here about the BK mod and thought orginally that maybe that was my fix, but after looking into the problem, I think my problem is not too much fuel from the accelerator pump but not enough. I removed the subframe and watched as I opened the throttle quickly (engine not running) and noticed that the squirt (more like a dribble) was relatively weak and not very long. So after putting it back together, I started it and manually operated the AP by pushing the linkage down with screwdriver at the same time I opened the throttle and it reved with virtually no bog or stumble. Do the springs in the AP get weak over time? Is there something I can do to fix the AP problem. Any advice would be greatly appreciated.

Share this post


Link to post
Share on other sites

you might want to dissasemble the carb and clean. The pump on the older models gets really dirty and sticks if not clean.

Share this post


Link to post
Share on other sites

Please fill us in on the resolution to this issue, I have that same year of WR and I have thought that maybe I need to do the BK mod as well.

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