i have a 86 srv540 fan that i got for free. had been sitting for ten years or so. got it started but wouldnt idle or rev very well. it was better when headlights were unhooked. added a ground wire from the coil to the frame and then it would idle nice. put a new fuel filter in the tank and cleaned the carb. idled great but try to drive and lean bog and backfire. theres no choke just an enrichment jet flip that on and it would rev up and drive ok at best. air leak or not enough fuel. cleaned the carb a few more times nothing. figured crank seals were shot so rebuilt the motor all new seals new pistons and rings. started up idled great but same problem. rebuilt fuel pump same problem pulled the carb again cant find an issue with it. seems like fuel since when you flip the enrichment jet it will rev. any one have any insight? what am i missing?