"completely revised" is a bit too strong a wording. It IS possible, with some careful grinding, to modify the linearity to such an extent that the result will be pretty usable.



That engine of the Calmato a few posts earlier? This is basically the ONLY real modification I did to that engine. As a result I had to double the spring under the throttle barrel to push out the increased lateral clearance, but this worked very well, and that engine to this day is in my posession and flies as good as it did back then. That is now almost 10 years ago (the pic dates 15 June 2016) and the engine behaviour was VERY acceptable and constant, both on the ground as well as in the air.
It did allready have a servo-slowdown function applied, and the remote fuel needle was heat-decoupled from the engine.

No electronics and just a fully "accoustic" carb.

The grinding of the carb is relatively easy and initially a matter of taking off a little bit, and retesting, Once you have done two or three, I could do them basically freehand in one go.
Of importance is, that the lower part of that groove (which is the part that handles 1/2 to full throttle) remains UNchanged, and the lower half, which handles the 0 to 1/2 range, needs to be gradually rounded.


If you look in my YT account, any gasoline conversion vid that predates the Spacewalker vid I posted a few days ago, by definition was modified the above way, and most of them (about 30 of them even if not every one is on my channel) was modified this way (except for the SuperTigres, which offer sufficient carb adjustability to allow direct conversion) and virtually all of them still run like that to date.