Hi folks, I just traded the yellow bike No fuel Injection for me yet!!!! in for Big Blue 08 yz 4 fitty and am super happy. I just put a FM Mega Bomb Header and a Power Core I could'nt swing the other 70 buck's bad time of the year if ya no what Im saying anyway's, My questions is I took it for a spin the other night for about 15 min and she was really popping on Deceleration however it was only 32 or 33 degrees out could this have had something to do with it? I have the stock jet's in it not even sure what they are.Can someone tell me what is the best jetting set up for this application. I also went up 1 tooth on the rear much better IMIO. Sorry have'nt had time to change my Avatar. Happy Hollidays thanx.