99 WR 400 New owner.Grey Wire?
Posted March 01, 2002 - 10:58 PM
Posted March 01, 2002 - 12:28 PM
Only folks with newer bikes (2000 and up)
Posted March 02, 2002 - 05:50 PM
Posted March 02, 2002 - 10:32 PM
Here is some good historical info on the gray wire mod:
I put a small toggle switch in-line on my 98 YZ timed WR when this subject came up last year to evaluate any changes in performance while riding. I found the mid-range throttle response to be slightly crisper with the gray wire circuit open vs. closed. I have since removed the switch and now run it with the gray wire clipped, capped and stowed. It is important to note that this mod is NOT a substitute for good jetting.
The most reasonable sounding theory I've read of why this circuit exists is it was Yamaha's way of making the US bikes run slightly less crappy with the throttle stop and airbox lid in place. Is there anybody out there that can verify this?
Posted March 03, 2002 - 03:17 AM
model witch I'm sure didn't come with the throtle
stop ,but hey I'm new to the 4 stroke world.