Something is wrong ! - wheel may be loose, tire may be separated inside or wheel bearing is shot.
Swap rear tires from right to left, see if the wobble changes sides. If the wobble changed sides you have a bent rim or a bad tire. If the wobble didn't change sides you have a bent axle or hub.
You have a damaged tire. Try rotating the front tires with the rear tires to see if the wobble switches to the back.
A tire wobbles when the nuts have not been tightened sufficiently.
The tire needs to be balanced or the shock is dead.
There can be several reasons for a tire wobble on a motorcycle. Here are a few things to check. Check the tire's inflation. An under-inflated tire can cause a wobble. Even if the tire is new, tubeles tires may leak especially if there is some fault with the rim. Or there may be a small puncture. Since the wheel has just been balanced, this is hardly a cause but what if it was balanced wrong? However, wrong balance would mostly cause a vibration at higher speeds. If the tire is a rear tire, then it could be misaligned, that is to say, wrongly placed so that it is skewed. This can cause tire wobble. Damaged or warped rim or break rotor can also cause a wobble. The part of the tire that is closest to the damaged part will have a tendency to jump when it hits the road. As can be seen from this, a front and a rear wheel can have similar problems which cause a wobble but more things can potentially go wrong with the rear wheel.
It's loose ! the bearing is loose, the shock is dead, the ball joint is worn.
broken belt in a tire. if you feel it in the steering wheel it usually a front tire or a rear if you can feel it in the seat
Bad tire? Bad wheel bearing? Bent wheel? Bent axle?
The tire could be faulty, the wheel bearing could be bad and need replaced, the wheel could be bent.
the wheelbase is the length from the center of the right front wheel to the center of the right rear wheel and the track is the length from the right rear tire to the left rear tire
Then you take it to a tire shop for possible repair.
baring? maybe a rotor?