StephenRC45 wrote:I'll hold my hand up here.

I've never ever tested a pump, the best it gets is to bleed the oil out of the pump using the bleed bolt. I've never premixed the fuel or tried to get oil out of the lines with drills or running the engine etc.

Fill oil tank, bleed pump, go for ride.

Same here.

The way you used to bleed Yamaha DT175 and RD125 pumps after a rebuild was to use the bleed screw on the pump first. Bleeding it until you couldn't see any more bubbles coming out. Then start the engine and pull on the pulley cable, so the pump was pumping at full capacity.
I think you had to keep the revs just above idle, maybe 1500 to 2000 max for around five minutes.
The engine relied on the liberal amount of oil poured on the main bearings, little ends and smeared on the piston and bores during the rebuild process while the air was being bled from the pump delivery line.

Also, on the NSR pump, doesn't the solenoid restrict the pump output drastically at low engine speeds and when there is no power to it? Or am I talking sh!te!