I picked up a new to me '87 Trail Boss 4x4 250 the other day for only $200. Its in solild shape and does start and idel nice but when you get on the gas it pops and bogs and......dies. Had little power even for a 250 LOL! But it does start right up via pull or electric. Put half a tank of fresh gast in and a can of sea foam. Plus a new NGK plug. Also sprayed carb cleaner right in the carb and sea foam in the carb (smoked the neighbors out!!!!!). It runs better but still want to die after a few laps around the house. The guy had it sitting inside for 3 years so you think its just bad gas/dirty carb still?