ok so i bought a banshee yester for 750 euro(1000 dollars) and brought it around last night it was fine.. brought it out this morning was fine but chain slipped off... fixed it so this afternoon went out to it and kicked more times than i could imagine... so i took out the left plug fixed the kill switch.. and there was spark from the left plug... so five minutes later put on the parking brake kicked started right up idling as it should and when i took off the parking started revving like crazy so i kit the gas and it stared bogging down and i dont know what it is(when i bought it it needed a tune up and it didnt idle when it was goin good last night) HELP HELP HELP