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Barry B's original topic on KTOG,
"I am getting ready to remove my oil injection pump, lines and check valves to be redone I thought I read somewhere where Kawasaki used a different oil injection pump in the H2R is there a benefit to using a different oil injection in a 72 H2 to cut down on over oiling now that we have much better oil available now let me know your thoughts."
The H2R oil pumps were the same as the early style street bike H2 3 line pumps, with a small variation. As we all know, the street bike pumps varied the output by two methods, differing rpms of the rotary sleeve inside them, and by shortening/lengthening the stroke of the sleeve as throttle position was increased, to vary output.
The H2R's had a different top controller, and did not use a cable to vary the stroke length, only variation was in rpms of the rotary sleeve. The actual cable holder was replaced with a set position part, screwed down to one of the two posts on the top of the pump, eliminating the stroke change ability.
The crankshafts were oiled the same as the street bikes were, down a stock line bolt with meter at the bottom, to the left main for each cylinder, then to the oil receivers on the left side of all left hand crank wheels, down to the rods, same as street bike cranks, right down to the same oil receivers. Stock street bike oil lines and check valves were also used on the H2R's.
The cylinders had no oiling output restrictions in the intake port floors, and, the remaining engine oil was by pre-mix, 30:1 fuel to oil mix ratio, Castrol R, 30 weight viscosity.
Variations have been used on a few different setups, including one year in Australia by Kawasaki legend Hurley Wilvert. For the Castrol 6 hour endurance race, HTW and team ran a stock class early H2, which rules stated MUST use oil injection, and NO pre-mix. So, Hurley fitted an S1 oil pump, with H2 cable wheel, and ran the entire race with that setup, eliminating added stop time to raise the seat and fill the oil tank. The bike ran the entire distance, 6 full hours on one tank of oil, no lost time to refill the tank, without oiling problems/issues. Very clever.
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