ok i have a 2003 RMK 800 thats ported slp single pipe and can bored 40mm flat slide carbs slp big air intake and when i jump or i am in way deep powder it spits and suptters i have went through and cleaned the carbs out made sure the air box is sealed and i have replaced the exhaust valve springs sled was set up by carls cycles in boise and i have a snow deflector for the exhaust so i know its not that either but when i am way up in the air it will sputter dose any one have any ideas and one more thing when i use the nos in deep powder it will make it run right but as soon as i let off its back to spitting and sputtering and drops down to 6000 rpms
