Engine weight could be reduced by using Magnesium for the crankcase and Titanium for some of the internal steel parts and screws and plastic carburetor bodies. All these things have all ready been done by one or more engine makers but as far as I know all of these features have not been done together on one engine.

Just think what a BME 115 would weigh if it had all these features specially if you could put a Titanium crankshaft in it.

Food for thought.

WRK