OVERHEATING

RECENTLY BOUGHT A NEW WR426 LEFTOVER FROM A SHUT DOWN YAMAHA SHOP. IF BIKE IDLES FOR 4-5 MINUTES COOLANT SPITS FORM THE OVERFLOW TUBE, THE SAME THING HAPPENS IN TIGHT WOODS WHERE HIGH SPEEDS ARE NOT AN OPTION. DOES THIS SOUND LIKE A BAD RADIATOR CAP OR IS THIS NORMAL

:D:)

Its kind of weird but my bike, since day 1, has always required to be idling 5 minutes before I can take off on it or it will cut out and sputter and this is in hot or cold weather. (more so in cold obviously)

And I have a buddy that had a 99YZ and he could fire it up and just take off.

I never could figure that one out.

RECENTLY BOUGHT A NEW WR426 LEFTOVER FROM A SHUT DOWN YAMAHA SHOP. IF BIKE IDLES FOR 4-5 MINUTES COOLANT SPITS FORM THE OVERFLOW TUBE, THE SAME THING HAPPENS IN TIGHT WOODS WHERE HIGH SPEEDS ARE NOT AN OPTION. DOES THIS SOUND LIKE A BAD RADIATOR CAP OR IS THIS NORMAL

I'd say not normal. I have a WR426 and ride it in slow trials, super hot weather (was up to 92 last weekend on my ride) and I have never had coolant spill, level have been rock solid too. Even after I'm idling.

Its kind of weird but my bike, since day 1, has always required to be idling 5 minutes before I can take off on it or it will cut out and sputter and this is in hot or cold weather. (more so in cold obviously)

And I have a buddy that had a 99YZ and he could fire it up and just take off.

I never could figure that one out.

I can ride right away with no trouble, I do get a flat spot if I snap the throttle real quick :) before its fully warmed up is all.

i think its normal, but dont u have a reservoir tank on your wr - i installed one from motion pro on my yz

Yeah it has a resevoir bottle. when it overheated in the woods the res. bottle filled up and then over flowed until almost empty. I realize that once the bike cooled most of coolant went back to the radiator, but this just dosnt seem normal. after all its supposed to be a woods bike. :)

Its kind of weird but my bike, since day 1, has always required to be idling 5 minutes before I can take off on it or it will cut out and sputter and this is in hot or cold weather. (more so in cold obviously)

And I have a buddy that had a 99YZ and he could fire it up and just take off.

I never could figure that one out.

Darin...

Thats cause your jetting still Sucks after all these years.... :)

Bonzai :D

Probably does, :thumbsup:but if so then Bill's sucks and more importantly Taffy's does.

Is that what your saying, Taffy dosent know jetting! :D

Actually I think it was because of the WR jetting that my bike took so long to warm up. Its not so bad now :)

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