BK Mod Variation Question



1 reply to this topic
  • bbeakley

Posted October 31, 2001 - 09:08 AM

#1

I got to thinking about the BK mod last night and had a question maybe you all could answer: Is the APJ interchangeable like the other jets? I thought that if I could get a smaller APJ then increase the squirt duration that I could get the same amount of fuel delivered to the engine over a longer period of time that maybe I could achieve even better throttle response. Plus, if I could get rid of the adjusting screw for the cam, that would eliminate tuning it each time you've got it apart for other maintenance. Another question, does anyone make one of these APJ's that has a mist pattern instead of a stream? An aerosol (sp?) of fuel would ignite easier than the stream. I was thinking this might also help. If you guys know of any suppliers for these jets that has a website or I could call I'd be interested. Thx, Brian.

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Taffy

Posted November 01, 2001 - 11:31 PM

#2

brian

someone has been into this and no, there is only the one nozzle! it is a squirt and not a spray and i don't think there's a lot you can do!

the only thought i had was that it should have squirted through an even smaller hole at a plate that would spread the fuel. unfortunately the only thing i can compare it to is one of those tractors that you see here in the UK (states as well?) that tow a water wagon around the speedway (bikes) track to wet the shale.

the water drops onto a "plate" that fans it out.

i think you're wrong to want it to extend right through rev range. you want it to be short and quick so that every time you close the throttle and go again, it's filled it's balls and is ready to squirt.

ultimately though, look at my signiture and discover the true way forward for the APJ!

Taffy





Related Content

Wiki
WR Camshaft Swap Info - last post by jamesm113

WR Camshaft Swap Info


Articles
  • 0 replies
Forums
Photo

2016 YZ450 by CaptainKnobby


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

Snake pit oct 30th by The Anvil


Dirt Bike   Dirt Bike Regional Discussion   California
  • Hot  293 replies
Forums
Photo

The "going back to the other darkside" adventure... by Monk


Dirt Bike   Make / Model Specific   KTM   250/350/450/505 SX-F & XC-F (4-Strokes)
  • Hot  113 replies
Forums
Photo

Megabomb Fitment by 288yz450


Dirt Bike   Make / Model Specific   Yamaha   YZ 400/426/450
  • 1 reply
 
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.