another WR450 jetting question

1 reply to this topic
  • charliep

Posted January 15, 2006 - 05:54 PM


I also posted in jetting forum, but:

My friend and I have identical 05 WR450's. All the free mods, side of airbox opened up and PMB silent insert.

I am running Indy's kit 168 main red #5, 48 pilot, 1.5 turns out,40 leak 72 starter.

He runs #160 main,NDJN needle #4, 42 pilot, 2 turns, leak plugged, 72 starter. He changed to a 100 pilot air jet, and reversed ACV diaphram.

Both bikes run great from sea level to 4,000 ft, California 60 to 80 degrees. No bog, no problems.

What's the deal? I would have thought with the WR running lean stock, that his jetting would lean the bike even more.

Anyone have any thoughts. thanks

Visit the ThumperTalk Store for the lowest prices on motorcycle / ATV parts and accessories - Guaranteed
  • Matty05

Posted January 16, 2006 - 03:15 AM


It is the ACV, screws around our jetting. YZ's don't have it and run basically the same jetting as your mate.
It seems like a great idea. I was as confused as you on this very topic, I still would like
to try it out sometime when I could be bothered playing around with jetting.


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.