Hi,
I just got an 86 TRX 350 that starts, idles and revs fine. It runs fine in 1st, but has a hard time accelerating past 2nd or 3rd. I can keep it wide open in 2nd gear and it clearly doesn’t have the torque it should.

I don’t know much about these TRX350s, are there any typical issues i should look at first?
Valves? Timing? Carb?

I’ll buy a new plug, but i’d be surprised if that solves it all…
Thanks for any advice!
Larry