BK mod-APJ squirt too short



No replies to this topic
  • mikeolichney

Posted September 22, 2001 - 09:52 PM

#1

I did the BK mod on my 01yZ426 last week. Went fine, the stock APJ squirt was 2.7 seconds. I used a videocam (30 frames per second made it easy to get it exact as 9 frames is 0.3 sec, just advance the VCR frame by frame). Resulted in a good improvement, once I went up on the main jet.

I just tried to do my WR250F, but it was exactly 9 frames, 0.3 seconds. The squirt was a little late so I adjusted the timing screw. Kind of bummed because it has a bad bog I was hoping to get rid of.

I tried to do my friends YZ250F, but his squirt was only 4 frames, a little over 0.1 sec. Whats the best thing to do to make the squirt longer, shorten the stop on the pump diaphram? His bogs pretty bad. I checked the diaphram and everything seemed fine.





Related Content

Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

BIGBORE FOR YZ450F 2006? by Taattie94


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 5 replies
Forums
Photo

Is it worth it? (Cam and High compression piston) by macgi77


Dirt Bike   Make / Model Specific   Honda   CRF 150/230 F/L
  • Hot  36 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


Dirt Bike   Dirt Bike Technical Forums   Suspension
  • Hot  59 replies
Forums
Photo

James Stewart back on a YZ450F by YamaLink


Dirt Bike   Special Interest Forums   Pro Racing
  • Hot  47 replies
 
x

Join Our Community!

Even if you don't want to post, registered members get access to tools that make finding & following the good stuff easier.

If you enjoyed reading about "" here in the ThumperTalk archive, you'll LOVE our community. Come join ThumperTalk today!

The views and opinions expressed on this page are strictly those of the author, and have not been reviewed or approved by ThumperTalk.