Seal the deal…
In my life I have always considered two-strokes to be trouble and in my experience the more pots, the more trouble; ergo triple trouble delivered by the purple pestilence!
The last job to do in the engine build frame was to refit the check valves at the bottom of the crank cases. These were an idea Kawasaki Heavy Industries dreamed up in 1974 for the H2B onwards in an effort to do something useful with any oil building up in the bottom of the crankcase when the bike has been idling or slow running, and to attempt to reduce the noxious smoke cloud from the exhausts when one is back on the power. When the engine revs up again crankcase pressure increases, forcing the oil into drillings at the bottom, which then feeds oil into the one-way check valve and then into the left-hand main bearing of each
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