got some snow today and this raider handles so much better with new hard-weld ski runners, no joke, probably the equivelant of a indy car for snowmobiles. i set the carb just like any other carb/engine right? start with the idle screw 1 turn out, adjust while running for best idle, and for high end just play with it and run it, correct? i rode it for about a half hour tonight, it really didnt like low RPM at first, it took a LONG time to get it up and finally move, but accelerated well once it was moving. it got better the more i drove it but it still probably is not right, i figured running it must help as the the sled has only sat for 1 year, but the engine has sat since 96.