My dad was given a 500 Sportsman that has issues(no wonder it was free), the gal had it to a stealer and he said camshaft. I don't believe anything they say but I don't ignore either. The thing starts and idles fine, no noises, knocks, clunks ect...that I've gotten used to with cam problems, it sounds like any other sportsman I've heard(which is where I question cam). If I give it throttle , it starts to rev up, then pops, bogs, falls flat on it back, and backfire. When I first got it running it would rev up fully in neutral, went for a drive and couldn't get it to rev at all, just wanted to pop, bog and backfire. Now won't rev even in neutral , but still idles fine. It acts like a throttle safety or rev limiter, but sounds different than the reverse limiter.
I have gone through the carb(done quite a few, know my way around them), I got it to run great idling. I am not familiar with Polaris , been building Japanese for years, cam chain looks tight, haven't torn into rocker cover yet, but trying to get some ideas as to what direction to go.
I know ECM, electrical safeties, fuel pump, timing and a few other thing can all cause this, but what area are more likely?
Thanks for any suggestions.
I have gone through the carb(done quite a few, know my way around them), I got it to run great idling. I am not familiar with Polaris , been building Japanese for years, cam chain looks tight, haven't torn into rocker cover yet, but trying to get some ideas as to what direction to go.
I know ECM, electrical safeties, fuel pump, timing and a few other thing can all cause this, but what area are more likely?
Thanks for any suggestions.