Displacement alone won't be so much of a deal breaker, what really defines if an engine is effective or not for a purpose is the power/torque curve. Maybe a 250cc motorcycle could even be a reasonable option if you were looking into an extreme downsizing which could still provide an acceptable overall performance.
Quote:
Originally Posted by fujioko
we will switch to the 420 CC engine and do more experiments
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Doing some math, many of those stationary engines within this displacement range would underperform some 125 to 150cc motorcycle engines coupled to a reduction gear in order to match the RPM input to a transmission. Well, what about experiencing a turbo into the 420cc engine?
