This old trx300 was pulling to the right when I bought it. Wheel cylinders were all seized up, a ball joint was REALLY bad, one of the A-arms had a significant bend, and a tie rod was partially stripped, so it had some play. replaced all of that.
Also attempted an alignment, but I assumed a quad was like a car and needed a slight toe-in. Now pulls in the other direction.
yesterday I read that that the honda 500s actually need a tow out of 1 3/16 +- about half an inch. Is that the same for these old 300s?
I found this site and saw that there's a service manual posted that covers this thing, but it looks like I need 10 posts before I can down load it. I'm excited to get my hands on it because this quad still needs more work.
After getting alignment straitened out (hopefully), I need to fix a hole in the muffler or replace it, and the spring return on rear brake arm is weak, but someone welded the wheel hubs to the axle, so I may be looking at a new axle too. Why would anyone weld those hubs on!?
Also per the alignment/ pulling issue, all tires are in good shape and have correct air pressure, so that's not the problem.
Other things I've done are replace the fuel petcock and added an inline fuel filter, checked all the diff fluids, and made it street legal with horn, mirrors and a brake light.
Mine's a 91 and I took a chance and ordered a brake like sensor bracket from ebay from a 91, but it didn't fit so I just fabricated a bracket from some scrap c-channel.