The reason it's so "small" and "compact" is because most of it is missing. You are missing 8 more cylinders from the power section, the entire blower section, the entire accessory case, and all the accessories (carb, magnetos, compressor, generator, fuel pump, oil pump, air distributor, tach drive, ignition harness, inlet plenums, exhaust, and other smaller bits). The port that you pointed to on the planetary gear case, that you thought was for the supercharger, is actually for the prop governor. Support equipment includes a fuel tank (12 to 15 gallons/hour at cruise speed), a 6 gallon oil tank, an oil cooler, either an air start or electric starter, etc. I can't imagine how this could be used on a motorcycle, but there are a lot of creative people out there. All that said, it is still quite a bit of engine for the size. I run one on my Nanchang CJ-6.
Crumbs I’d have to find it in all the junk I collect🤣! really did not buy it to sell sorry, if you really get stuck let me know but I think there are a few of these out there 👍
