Recently purchased 05 wr450 ran good on the street when I bought it 4 monthes ago,
What its doing- starts and idles great ( even for several min )
after it warms up alittle I give it 6000- 9000 rpms and on about the 3rd rev
it will cutout/stutter a couple times then slowly die then backfire and only restart sometimes if I pull
the hotstart and then if it does it only idles for a while then dieout again, die's even faster if I add throttle.
generally not restart till next day, then on the next day fire right up and run fine till I do the
What I changed motor wise since it ran good-
was stock needle now JD red on 5th clip down
was 165 main now 168
was 45 pilot now 48
was 50 leak now 40
cleaned out carb really well withe brake cleaner with no problems found
Tusk fuel was 2 1/2 screws out now 1 1/2
Routed top two vent hoses up under tank
Adjusted accel pump timing, by eyeballing it so the squirt barely missed the slide and seemed about 1 second
Jumpered clutch switch to always closed.
Disconnected blue/white wire but now reconnected with no change.
Checked float level and was right at 8mm and needle looked brand new.
I did wire a trailtech vapor to the orange wire at the coil for rpm pickup but already disc that too.
New power bomb.
Checked valves and were right in the middle.
I honestly cant tell if its starving for fuel or to rich .
I guess I am gonna pull the carb and look for any oopsies.
Any ideas guys ?
Edited by still2smokin, April 07, 2012 - 10:15 AM.