05 WR450 - overheating and other questions
Posted June 16, 2005 - 11:58 AM
I'm brand new to dirt biking (got to hang up the street tires when the baby was born ).
Anyway, my buddy and I bought two 05's over Memorial Day and have been ripping around getting used to the dirt. We're completely addicted and having a blast. Being in the NW there's a LOT of mud and ruts and steep single track riding. Needless to say we're riding pretty slow as we get our legs underneath us, and have been having our bikes overheat a lot on these steep muddy trails.
Any ideas what we can do (besides ride faster - we're working on that one ) to keep the bikes cooler?
Also - The links I've seen to the uncorking mod all point to an older WR250. When we got into our exhaust pipes the piece we pulled out was shaped a lot different then the photos in the ThumperFaq link. Does anyone have updated instructions for the '05 WR450?
Thanks - looking forward to learning a lot from you all.
Posted June 16, 2005 - 12:22 PM
As far as uncorking your bike, you can remove the entire baffle or drill out the smaller baffle that is held in by rivets. I removed the entire thing and ran
for a while like that but ended up buying the Pro Moto Billet baffle. I like this best. More power and a little quieter. Also, remove the air box baffle as well.
This will give you about 1/3 more flow, then rejet to compensate and find out
what this bike can really do.
Posted June 16, 2005 - 01:43 PM
I also jetted my bike with a 165 main and 48 pilot and a Zipty fuel screw. To address my overheating problems I changed the coolant to Engine Ice http://www.engineice.cc/products.html. Since I switched to this stuff, I've only had one instance where my rads started bubbling.
I also dropped a tooth on the countershaft sprocket to 13. Now I can use 2nd gear!!
*note* editied for typo's, I installed a 48 pilot, not a 46.
Posted June 16, 2005 - 07:30 PM
Posted June 16, 2005 - 07:42 PM
We pulled out out the entire baffle but I wanted to make sure it was OK to run it without anything in there. I like the low end power and extra torque, but if it gets better with the Pro Moto Billet I'll track one down!
Do you know where to find out how to remove the air box baffle, or is that a stupid question ? Maybe it's listed in the article that is mentioned in Johnny34's reply.
Posted June 16, 2005 - 07:55 PM
Posted June 16, 2005 - 08:54 PM
Posted June 16, 2005 - 09:01 PM
Posted June 17, 2005 - 04:43 AM
Thanks Indy - I'll have to save the re-jet until I've got somebody to show me how, but I'm glad to have the settings. First I have to learn, uh, the basics - like changing oil
You can go to the Sudco web site and see a detailed blow apart drawing of our FCR carb. First time you rejet you should pull the carb off of the bike and do all the jets at once.