Well ...I installed new ujoints and still have same problem.. so with the front drive shaft off I have no resistance when pushing quad in netruel(forwards or backwards ) but when front drive shaft is installed, when I push the quad forward (10 feet) the rear of quad pulls up. And when push the quad backwards in netruel (10 feet) the rear of quad sucks down . I was thinking maybe the drive shaft yoke phasing was incorrect maybe. I can't figure this one out... any advice would be appreciated... thanks

 

Have you got the same outside diameter tyres front and back. I once repaired a Honda 300 that would jump every so often. The frame had broken just behind the front diff, because the tyre sizes were a bit out, front end and back parted company until the front drive shaft spline came out, pressure released, it popped back in again and repeated.

 

Thanks for the reply. ..
They are the same size (tires) , they are actually original from 1989. I was thinking the same about the tire size, then I got to thinking , the previous owner told me he did some work to the rear end so I was thinking maybe he replaced the rear differential that had a different gear ratio than the front differential. I don't know if the big bear even had different gear ratio's but I know that front and rear have to match.

 

Still have the problem... anyone know of a Yamaha forum that can maybe be of some help? Thanks

 

Try the grizzly forum....maybe they can shed more light on this particular subject/problem.

 

Thanks.. I will