Hi Crash One, I don't think any of this carburettor tuning procedure is relevant to car or Motor-cycle engines.. This is because the aero engines operate for long periods of time at a fixed high throttle opening.
Motor Bike riders are constantly varying the throttle to maintain cornering stability etc, and require instant response to a snap throttle opening. This requires a richer mixture to be already present, to ensure correct power delivery.
Also I have an almost Concours vintage motor cycle that has always been run rich. It suffered a blocked slow running jet one day, and caused the chrome exhaust pipe to become coloured because of the increased EGT... A replacement exhaust pipe will cost me over £50.
There are other IC Engines that use much different tuning techniques to ensure safe rpm operation.
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