[Quimrider]

I was assuming he would be using the oil pressure test port for the supply, hence the need for a restriction to keep adequate oil pressure to the rest of the engine. I haven't had my GZ250 for quite some time, IIRC I was thinking of what blaine said for the supply and then just let it drain back into the valve cover, just don't forget to make sure the rest of the engine had adequate oil supply.