I recently bought a iq 600 that was smashed up and sat awhile. ive aways been ski-doo my buds are all polaris. i fixed cozmetics,cleaned carbs,valves,etc.1200mi and comp is perfect.sled was pukin antifreez and low end boggie.(that was a head gasket)now sled runs perfect! my issue is one plug(pto side) is lt blk other(mag side)is cardboard brown. piston wash follows plug color. is this even a issue? is it common on a polaris 2cyl to off jet carbs? sled does have a slp air intake. Any imput would be greatly apriciated. thanks