I recently picked up an 86 350 fourtrax for my son. Was not running at the time but motor had good compression. I brought it home and it has 2 issues that I know of. I hooked it up to a jump box and hit the starter button. Starter is engaging but will not spin the motor. When I kick start it, it only engages every few kicks. I got it running by pulling it behind another 4 wheeler. No smoke but could not keep it running. I’m thinking fuel pump issues as well. Is it worth messing with and what do you think could be wrong with it. Thanks in advance!