Never knew the bicycle three speed makers made engines. And yes the float isn’t good but the worst bits are inboard of the float needle, the tickler goes through at an angle. I was hoping they used a engine from a well known motorcycle manufacturer. so might have found a piston, not a problem making one but then would have to balance the crank as wouldn’t use the heavy cast iron. To start with you have to calculate is it a two or four stroke, as can start as little as 50% for a two stroke and as much as 70% for a four stroke, then its add the stroke, revs, is it a horizontal or vertical and with the weight of frame its to be fitted into as that can cause harmonics to set in.
