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
Tbone81

05 Wr450

9 posts in this topic

Just got it and ride between 3000-8000'. I have about 60 miles on it now and have installed an FMF Q pipe, skid plate and radiator guards. It really runs good at the upper rpm level but stumbles mid range (saw the jetting thread and will experiment). I have not cut the grey wire or performed any jetting thus far. Would like suggestions for improvements. This is a really nice bike; I was riding an 87 XR600 and the weight/suspension and acceleration are a lot nicer on the WR.

Share this post


Link to post
Share on other sites

Try and disconnect your TPS on the left side of the carb and see if your midrange stutter goes away. It only takes a few seconds. If not then rejetting will be necessary to richen the midrange. :applause:

Share this post


Link to post
Share on other sites

Hey Indy - Did you get 490cc by boring only, or did you also stroke? Who did you use. Thanks :applause:

Share this post


Link to post
Share on other sites

I was going to stroke it with a Falicon heavy stroker crank to a 502 kit but they wanted 10 weeks to deliver it. I had to rebuild her with a standard new crank. :applause:

Share this post


Link to post
Share on other sites

OK disconnected and ran fine but terrible backfire so I reconnected. I was at 8,000 ft plus. It runs OK but the way it ran with the TPS disconnected was great. Just need that backfire to go away.

Share this post


Link to post
Share on other sites

Spend $65 for the JD jet kit and another $20 for the zip-tie fuel screw. If you like your bike now, you will LOVE it after these mods. Go to the jetting forum to get hints on the setup. :D:D

Todd

05 wr450

fmf Q, jd jet kit, zip-tie fuel screw

Share this post


Link to post
Share on other sites

I'm not sure what main jet you have in there now, but that or the needle position has got to be the culprit (I'm assuming the grey wire is pulled).

Share this post


Link to post
Share on other sites
I'm not sure what main jet you have in there now, but that or the needle position has got to be the culprit, you've got to cut the grey wire too.

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