I have a 1998 Yamaha Grizzly 600 4x4, it is not transfering but about 50% of the power to the wheels in 2 or 4 wheel drive. I have pulled the cover and the belt is 1 1/4 inches wide and looks good. it also meets the width from factory specs. So I am left scratching my head with this one. I was sure it would be the drive belt.

Can anyone help with this?

WHAT I DO IS DRIVE IT WITH THE COVER OFF SEE IF THE PRIMARY+SECONDARY MOVE CORRECTLY+RIDE THE BELT UP WITH OUT BACKING OFF UNDER ACCELERATION,BE CAREFUL,KEEP YOUR LEG FAR AWAY+WEAR SAFETY EQUIPTMENT.TRY NOT TO GET THINGS DIRTY.I WOULD FIRST SEE IF THERE IS ANY CONTAMINATES.

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01 SCRAMBLER 500 4X4/#170 MAIN JET,JET NEEDLE RAISED 2,1-1/2"FRONT WHEEL SPACERS,POLARIS SPEEDO+LOW PROFILE SHIELD,KEVLAR DRIVE BELT,WIDER SWAMPLITES,BICYCLE HAND GRIPS,GIANT IGUANA NAMED "CHUCK"

check your primary to see if there is enough grease on the rollers because if it has slung the grease out you will not get proper clutch action and therfore slippage.

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06 Wolverine
EPI clutch kit
GYTR Skid Plate
GYTR rear diff guard
GYTR radiator guard
GYTR A-Arm guards
front bumper-truckbed coated black- looks great
K&N air filter
DYNOJET jet kit
GYTR pipe
CMP front and rear racks
Reverse Rev limiter override kit
Automatic backup light kit
FST 488 bbk and cam
Ported and polished head
powermadd handguards

i was a yamaha technician and have see this before, it will probably be the "sprag type" clutch in behind the primary, remove primary, a tin cover behind that, then remove the cover primary shaft comes though and you will find the "sprag type clutch" as yamaha calls it. last time i did one could not buy the clutch ears seperate had to buy whole unit and was about 350 if memory serves me. hope that helps ya.