Setup/Mods for the '04 WR450.
Posted December 04, 2003 - 09:27 PM
With the basic (throttle stop, baffle removed, grey wire cut, airbox opened) where/how would I find out the right jetting and other setup/mod info that I need for the bike at 500ft alt. What about the YZ timing or any other mods?
If someone has the time and could list the whole lot in one thread, it would make us newbie 'modder's' very happy. If a search is suggested could you list "Words to search for" to save time. Thanks to all you guys who help us out here all the time. Hopefully I'll be helping others out as soon as I've got this all figured out.
Posted December 04, 2003 - 09:45 PM
Posted December 05, 2003 - 03:41 AM
Step two is getting the suspension to work properly. I ride in the northern woods and needed to have the suspension revalved to have it work properly in the conditions i usually find myself. I would suggest giving the suspension to a local suspension tuner since they usually have a better handle on the type of conditions the bike is likely to be used in and be honest with them about your riding ability. There is big difference between Randy Hawkins' and my suspension settings because there is a big difference in the approach speeds to obstacles between Hawkins and myself. I will leave it to you as to which is higher
All the other mods are just personal preferences in my view but the once the bike is breathing properly the two items i mentioned are essential to get the bike up to its full potential.
Posted December 05, 2003 - 05:49 AM
One thing I wanted to point out though.. you can't "YZ time"
the new WR. It has an auto-compression release. To get the
YZ boost, you need to drop in a YZ cam.
Posted December 05, 2003 - 06:43 AM
I will be getting the jetting kit and the suspension look at.
Posted December 05, 2003 - 07:27 AM
100 pilot air jet
CVQ needle in slot 4
Zipty pilot screw - 2 turns (get one the stock screw is just about impossible to get to because of the starter motor)
Took it out to the desert for a week over Tday and it ran very well. Also had no starting issues with this jetting. Elevation was basically sea level and the temp was 70-75F.
Having said that I came home and installed a YZ450 exhaust (just the muffler). Did a quick fire up in the trailer and it was popping like mad and shooting flames out the exhaust on accel and decel. I'm thinking the pilot and needle might be too lean. I think I'll richen the pilot and raise the needle a clip. I'm also going to check for any exhaust leaks too but I'm pretty sure it's tight. Anyway that's my project for today. To be honest I'm amazed that there's that much difference in the two exhausts. Is the wr exhaust that restrictive even without the baffle? Anybody got any other ideas?