My buddy has this sled and i said i would work on it for him.. just looking for some input...not sure what the pipes are haven't looked at them but he says there is no markings what so ever. maybe aaen? or slp? i remember looking at blackmagic pipes for my 440 and i think the only thing i had to switch for jetting was drop the needle one...also for clutching i'm not sure what this motor is supposed to turn for rpm. i know the blackmagics for mine were supposed to turn 9250 rpms peak. also this is a carbed sled, stock gearing, jetting and 150 lb rider. i just want to help him and not burn his sled down...