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
beasly

Name that jet.

11 posts in this topic

Hi folks. Can anyone tell me what the unnamed jet in the lower right hand corner is? This set was supplied with my new 07.

07_WR450_jets.jpg

I need to do some more reading on what people are finding works in the 07s. But for my area (~300ft, say avg. 70F) this combo looks to be too far on the rich to start dialing in with.

Thanks for any comments,

Rob

Share this post


Link to post
Share on other sites

I should have put a ? behind my response. I thought 110 was a bit large for the starter. Way too many jets in these carbs.

Share this post


Link to post
Share on other sites

Main Air Jet : 110 5UM-1484F-29

The WR does not have that jet. It's for the YZ.

The rest is what I installed in my '07 and it seems to work real nice so far..

Share this post


Link to post
Share on other sites
It's the Pilot Air Jet. It goes in the little hole on the airbox side of the carb bell...SC

Thanks SC! :lol: There are at least two drawings of the PAJ in the service manual. The smaller, less detailed of the two looks a match. Another, larger picture seems different.

I have all winter ahead of me to do more research and the mods. Probably wishfull thinking that the first carb change will be the last. The book recommends removal of tank, seat, side covers, muffler, drain coolant and remove tank, a bunch of hoses, and rear shock. Oh well I need a heavier rear spring anyway. And I'll feel better knowing everything is greased up properly.

Rob

Share this post


Link to post
Share on other sites
Main Air Jet : 110 5UM-1484F-29

The WR does not have that jet. It's for the YZ.

The rest is what I installed in my '07 and it seems to work real nice so far..

You may be right. I don't see a main air jet in service manual.

Man you guys post fast!

Rob

Share this post


Link to post
Share on other sites
Main Air Jet : 110 5UM-1484F-29

The WR does not have that jet. It's for the YZ.

The rest is what I installed in my '07 and it seems to work real nice so far..

The 07 WR does have a Pilot Air Jet. It is a #70.

Share this post


Link to post
Share on other sites
The 07 WR does have a Pilot Air Jet. It is a #70.

You are correct, it has a pilot air jet, but does not have a Main air jet.

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