attex superchief 500 troubleshooting help please

[mototrix36]

Just got this 72 attex superchief. Ran rough and wouldn't idle when I got it, tuned it up after that it ran great just like I would think it should but...

[Mitchell]

Hi All

I have a 2000 Bigfoot with 18 HP Vanguard Engine (260 hrs). I just changed the fuel filter, but I don't know if previous owner ever...