01'WR still not right. HELP !
Posted February 26, 2001 - 10:20 PM
I feel I've been trying just about every jetting combo that is possible and ended up taking it to the shop out of pure frustration to get the problem solved. Unfortunatly, they only have a small little lot to try and recreate the problem that I keep experiencing and were unable to experience it.
I know how awesome the blue machine really is but at this point I'm beginning to think that perhaps there may be an elecrtical glitch that happens occasionally to make my bike start crapping out as it comes into the mid-range about 1/4 to 3/4 throttle. If anyone has had any experience with this kind of trouble please let me know what to do next.
I have previous posts that may make this problem a little clearer with the backround info.
Thanx & Hope to hear something new.
Posted February 26, 2001 - 12:17 PM
Posted February 26, 2001 - 12:42 PM
My 01wr426 runs killer and I didn't do anything but remove the airbox cover, exhaust tip, machine down the throttle stop...
I run from sea level to 6000 ft.
The yz cam timing is a wash, I miss the bottom end bark...
I think I'll go back to wr cam timing.
Posted February 26, 2001 - 06:52 PM
Posted February 27, 2001 - 01:24 AM
with the carb off & a twist of the throttle is the accelerator pump jet working?
it should squirt for three or four seconds.
Posted February 27, 2001 - 09:09 AM
Posted March 01, 2001 - 07:06 AM
I haven't yet pulled the carb off to verify that,and will definately try it, but it seems I would be experiencing this problem throughout any throttle position if the accel pump were failing - Yes ? Correct on the needle clip positions.
I am now at #168
Clear and cool...45-50 degrees.5500 ft
Trail rides fine. Track riding is the problem even after the bike has warmed up thoroughly. Hard acceleration out of turns at 1/4 to 3/4 throttle is where it occurs.
I never had this kind of problem with my 99 400. It's still at stock settings and only slight hesitation when it's cold.
I'll stick with it. Pretty frustrating though.
Posted March 01, 2001 - 08:20 AM
Check the easiest stuff first. Sometimes you'll nail it.
Posted March 01, 2001 - 08:54 AM
1. Wet air filter
2. Dirty air filter
3. Air leaks
4. Air filter with to much oil in it
5. Not allowing your air filter to dry after oiling it
6. Old spark plug
7. Clogged accelerator pump!!!!!
8. Throttle stop removed and not trimmed to the appropriate length FOR YOUR BIKE! (I would not recommend using someone else's cut off length, do your own research...)
I found that if I could diagnose the problem with one of the above problems it could always be cured with a couple turns of the fuel screw.
Remember the WR has a fuel screw not an air screw. Adjust the fuel to match the problem i.e. Dirty or wet air filter, engine not getting enough air. Go in on the fuel screw, decrease the amount of gas. You want to attempt to equalize the air gas mixture. (most of the time anyway...)
I only attempted to change my jetting when I figured out how my individual bike ran and only in an effort to get more power.
JJ from WA - 99 WR; WR timed, EKN Needle, Scotts stabalizer, Scotts triple clamps, Pro-Tapers, Michelin S-12's, Terry Cable hot start, MSR Raptor clutch lever, Moose skid plate, Works frame guards, Acerbis Pro Rally guards, Renthal MD-soft grips, Factory Effex graphics, YZ IMS seat base, YZ Factory Effex seat foam and gripper seat cover, YZ rear fender