Hey all, I'm mounting a rotrex supercharger to my vh41 and looking at drive options.
My two thoughts are:
1- Get another nissan water pump pulley(as they all seem to have same bolt pattern) and mount it back to front on the water pump so it steps out and drive the charger of this. Problem I see with this is possible strain on the water pump bearings...???
2- Mount a crank drive pulley which is obviously a lot stronger but having trouble finding anything on the net as I have no idea what will fit. What size is the main pulley bolt and will I need a longer bolt due to the added thickness of the pulley?

Anyone's thoughts welcome. Cheers cam

I have a US vh41 I am swapping right now. seems like you might be able to mount it in the center of the heads, and re-locate the alternator. not sure how yours is set up...any pics?