Picked up this baja 90. Clutches seemed to maybe slip a little when we first got it. But now they are locking up and when you try and start the quad it’s trying to drive.

Changed the oil drove for a bit seemed a bit better. Changed oil again. But now it’s stuck can’t push it backwards or start it.

Is there a way to adjust or free them? Or do we need new clutches?

 

I have a feeling there are several different Baja 90s but all will have a centrifugal clutch so I would take a look at it. If it has a Minarelli 2 stroke engine, it is in the belt box, and the variator pulleys and belt should be checked as well. If the engine is a Honda Cub clone, the centrifugal clutch will be behind the RH engine cover.

 

Im not sure what exact model it is the vin is kinda hard to read. But it is a 4-stroke chain driven quad. Yeah looked at pulling the rh cover off today but you can’t get it out past the frame. Looks like you’d have to remove the entire engine from the frame.

 

There are a few GY6 engined 4 strokes but most 90cc Chinese 4 strokes have a copy of the Honda 90cc engine. However, the auto version of this seems a bit of a mystery, very little information on the net, as to how the auto gearbox works. It will have a centrifugal clutch, and that is the most likely cause of your problem. All you can do is take a look.