Hi all!

So I have had a bad grinding and wobble for a while. I have progressively made the problem less severe by greasing the guide pins on my brake caliper, replacing my rear rotor, and replacing the back tire. After replacing the rear rotor, The majority of the wobble is gone, and I have eliminated the noise. The problem is, There is still a slight wobble! Do I need to have it balanced? Or does this sound like it could be my bearings? Thanks!

 

does the wobble only happen when your braking? Or all the time.

If it only happens as you brake, then there is probably something wrong with the brake system. If its all the time, its probably related to the tire, wheel, or bearings.

If the wobble is constant and the rear tire was not ballanced, then that could be the issue. Does it wobble only at certain speeds? Or does it just get worse the faster you go?

 

If you bike has a centre stand then put it on that, remove the brake caliper and turn the wheel, listening for any harsh grating sounds that might indicate a worn wheel bearing. Grab the wheel at the front and rear of the trye at the midway point and check for play by pushing and pulling side to side on the wheel. If there is any play whilst doing that then it is almost certainly down to a worn wheel bearing. Check how much pad material you have left on the pads while you have the caliper off the bike. It could be that you are getting dangerously close to metal to metal contact with the disc! Lubricate the chain while your at it as well. Hope you find a solution!

 

Hey guys. Just found out what the problem is. I was riding it around to find out what sort of patter the wobble follows. I was riding in a canyon and my bearings, for lack of a better explanation, exploded. Now my rim is crack where the bearings rest. Any suggestions?

 

oh snap.. happened to me before on a ninja.. only good suggestion i have is to replace the wheel and grab yourself a new bearing kit.. also inspect your rear axle bolt for damage such as slight bends or even chips from the rear wheel collapseing on it.. you dont wanna put new bearings on a worn axle bolt and have the same problem from a little nik in the bolt grinding into your bearings.