if i remove the air-con compressor motor from my '90 VN would it improve performance of the engine? if so id hav to purchase a smaller belt. are these available? or would i hav to get one specially spliced?
The air conditioner compressor when the clutch is not engaged is basically a free wheeling pully that changes the direction of the belt. Yes you have lost a microscopic amount of hp but that is nothing compared to the power steering pump, water pump and alternator, so just leave the AC off when you want more performance.