Hello everyone , im hoping for someone to help me with this quad, we just purchased it and what is happening in when you put it in gear and give it throttle , it seems like the rear end hops, could this be clutch issues , swing arm bearings ? We only know its a 86 not even sure of the size , i tried loosening the jamnut on the cover , that came loose but the slotted flathead part is not budging , any ideas anyone ?

 

That Would Probably Be A 350 Cc I Used To Have one of Those if there wear axle is wobbling that's the axle bearings that are shot