Post back later what you think.
One secret to keep in mind, not mentioned in the book, is about about air:fuel ratios.
As we gently load an engine by increasing the throttle and letting the clutch grab, AFR should get leaner!
Arrow points to increasing load on the engine coming off of idle. F is fuel:air ratio. Inverse that and you'll get AFR but the exact number is not important. Every engine is a little different.
The point is the engine runs best with mixture going leaner as load increase, unless near maximum acceleration or load. Then it needs richer again.
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from Walter B. Larew,
Carburetors and Carburetion
Big secret.
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