so i bought a Suzuki rm 250 (2004) the other day when i bought it had a full tank of gas and it came with a jerry can full of gas that i think was over mixed. the bike was running great with the first tank of gas then when i hit half a tank of gas i added more from the jerry can then i went riding and a couple of hours later i ran out the tank went dry so i refilled the tank with more gas from the jerry can and now it will not start unless i take the spark plug out and clean it the spark plug keeps getting dirty and covered in oil but after i do that the bike will start but will not run when you put it into gear so is this because the gas is over mixed and if it is will there be any damage to the bike or will i have to clean out the carb or something