Do these WR400s have a rev limiter?

5 replies to this topic
  • 2000WR400

Posted May 16, 2000 - 07:15 AM


I have removed the air filter lid and the baffle is out. When I really get on the bike hard in 1st-3rd gear it seems to hit some kind of a limiter, could this be a rev limiter? I guess I never really hit it the rev limiter before I removed these two things, does is just get there ALOT faster or is there something wrong?

  • Kevin_in_New_Hampshire

Posted May 16, 2000 - 08:07 AM


My 99 DOES have a rev limiter. I thought my main jet was off. But it sounds as if it my rev limiter. Other than my street bikes, this is my first 4 stroke race bike. I only raced 2 strokes prior to this.

Just short shift your bike and torque your way through life!

99 WR

  • Ron_in_SoCal

Posted May 16, 2000 - 09:06 PM


I had the same problem with my year 2000 WR, especially after I rolled the exhaust cam to the YZ spec. It would rev to the moon while spinning the rear wheel. My solution, and I can't recommend this for tight trail use, was to go to a 15 tooth countershaft sprocket. Made a world of difference, but now it's a handful in the nasty. A cheap way to stay off the rev limiter, but not the answer. I'm installing a 10oz flywheel weight (I've had it for 3 weeks now, no time to install yet) and hope this is the fix.

[This message has been edited by Ron in SoCal (edited 05-16-2000).]

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  • Bryan

Posted May 16, 2000 - 09:10 PM


Did you shave down your throttle stop or remove it completely?

When I got my 1999 WR, I removed the throttle stop completely and my bike acted like it had a rev limiter. When I shaved down the throttle stop as per Baja Designs, it revved to the moon. If you have a 2000 WR, you need to replace your stock throttle stop with the YZ426 throttle stop. It's only a few bucks.


  • Kevin_in_New_Hampshire

Posted May 16, 2000 - 11:10 AM


Will the YZ throttle stop work on my "99? This is just in case this is my problem also.

  • Matt_Porritt

Posted May 16, 2000 - 02:00 PM


The YZ/WRs have a rev limiter at 11,500rpm.
They also have a neutral switch that lowers the revlimiter to around 4,500rpm while in neutral to pass stationary sound tests.

**Ride it like you Stole it!**
Matt Porritt
99 YZ400F
Rubber Chicken Racing


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