I purchased a stock 93 banshee about 4 months ago from an old man that left it in a barn for 20 years because he injured his back so it had hardly any miles. I Replaced all the fluids and the filter and ran fresh fuel through the carb. It has ran great for the past 4 months and I've been riding it really hard. Last week I hit a jump going too fast and came straight down on the front, the quad rolled away and was fine my friend parked it for me because I was messed up (the quad was still running fine) then the next day he went to fire it up and it has a major bog backfires like crazy and won't idle. Could the impact have affected anything? I changed the spark plugs and took the filter off, still has the same problem.