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HLVH speed lever conspiracy theory?

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The speed lever lie has always bothered me. Swing to the left and I have 0 to 1000 rpm. Ok, adjust to say 700 rpm.
Now swing lever to the right and adjust the speed to 700 rpm by the rpm gauge. The speed is always noticeably faster and not by a little amount.
The speed gauge is the strip of metal that moves up and down next to a metal plate with numbers on it. I say the numbers are a lie.

I recall the right and left names originated from the French chambers of government.

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