Howdy ya’ll, havnt been a member here for very long and ive tried searching but maybey im not wording things right i guess. New to me ATV, from what ive learned it is a:

2004 TRX 400 FA with the hondamatic transmission.

Issue is, ATV starts fine, but once you put it in gear it may or may not die, or it will die as soon as you give it some throttle. It sounds and feels like something is locked up in the transmission or subtransmission or idk. Its like dumping the clutch in a vehicle with the parking brake engaged. Same thing happened once before a few months ago but we let it cool down and rocked it back and forth a few times and it has worked since. Tried that today after we got it home and it made it about 4 feet and locked up and died again.

From what i was told from the guy i got it from, the previous owner had the top end and the trans rebuilt prior to it being sold. How long ago it was i dont know.