Well, as you probably know I got some firing issues with my 650 poo! Tonight I go to check it out, I was thinking about all the possibilities that it should be. The sled wasn't make spark on all cylinders. I was thinking a bad connection or something like that. I remove the air box and all the carbs. I unscrew the plugs and pull the cord. The spark was back again...[:0]. Now I'm pretty confused, I didn't touch the wiring at all... I make multiples test like knock the CDI, wiggle all wires, play the kill switch on and off... Now it seems to spark like a new sled![?] I think our sled just need some attention some times[}]? What do you think happened?