any type of 10mm brushcutter carb.
search scrap yards. they breed there...
they do need some modifications.
hooking up throttle cable is the main concern.
(but most parts will swap over, such as throttle arms, choke levers, diaphgram assemblies. depends on what carbs you have in front of you exactly.)
a pulse line on the carb. usually as simple as drilling a hole in the appropriate place on the intake manifold.
a SUPER LIGHT spring under the diaphgram. the intake can only "suck", the spring provides the "push".
usually the needle valve spring pinched from another carb
getting the proper subaru carb works.
if there is any truth in this compression ratio nonsense (the lehr is actually a HUASHENG copy, so why it would be specifically designed with a higher compression ratio puzzles me.... they copy, they dont design. copy. not design.)
anyways, if there is any truth, all the better! more power! and they need it! run 95 or 98 octane
the oil goes black real quick on petrol...