OEM wheel sizes

looking for oem rim sizes for a 1986 trx 125, I’ve looked at several sites and they only list the back wheel!?! I have a wobble, I’m positive its the rim and I want to replace them for my son, I tried taking the rim and tire off and beating it but cant get it perfect enough for my liking so I was going to replace tires and rims since the tires are below 50% anyway. id really appreciate a link or help in any way, I’m certainly not going to put new tires on a misshapen rim! HELP