yamahasferlife
New member
2001 Vmax 600 triple starts, runs on middle cylinder, and backfires like a beotch! didnt see this happen but i was told the first time it was started fuel was pouring out of the carb overflow tubes and started backfiring. first thing i thought was a stuck float so we pulled the carb and checked and they all worked fine.. jets were all clean as a whistle so we put those back on. started it up and it sounded like it was bogging and ready to backfire. pulled off the two outside cylinders and confirmed it was only running on the 1 middle cylinder. took the coils out and tried testing them... didnt really know how but had about the same ohms the way we tested.. couldnt find a bad one really and put it back together and just tested spark and it sparked on all 3 cylinders
then we were confused... soo we stuck the carbs on half *** withouth the airbox and bolted the coils back up and gave it a pull.... started up fine and ran great on all 3 cylinders.......again we were confused... so we put everything back together cause it ran great.. bolted airbox up and put the can and everything back on..gave it a pull and only ran on 1 cylinder again.... backfired again so shut it off with the kill switch and the key was still on.... its electric start.... one of the relays started clicking like crazy so we pulled it out... tried starting it without the relay it did the same thing but no lights. shut it off and we were giving up... plugged the relay back in and it stopped clicking even with the key on.... wanted to see if it was clicking from not enough voltage or something so i turned the key to start it, barely cranked a degree but BAMMMMMM! backfire out exhaust like the rest. scared the shit outta us and it was 2 in the morning so we gave up. sorry its so long and thanks for reading.... didnt want to leave out any details... what the **** could it be?????? thanks alot for any help its much appreciated!
ps when it was backfiring and only running on one cylinder i tried high and low beam

ps when it was backfiring and only running on one cylinder i tried high and low beam
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