oooh, and as for that one. i said why. theyre too underpowered for my use. i got a HT and stuck with it til i got my license back.
now even the HT is lying in the driveway where it fell over 3 days ago
comes down to this;
the 25cc engine needs to be geared low to be of any use on a slope. it then over revs once youre doing 25km or so. so it requires a 2 speed box, for my area (hilly and a LONG way from anywhere). while i have a suitable auto 2 speed, other commitments has prevented me from doing anything. i needed transport at the time that didnt require a solid weeks work to make good and reliable.
i did mount one once, badly, more as the test run than a permanent thing. i broke the lugs off the case. i sort of expected it to happen, i was desperate at the time!
i contemplated making a new sump for them with a solid base to bolt to. contemplated just getting the tig onto existing case and reinforcing it a bit.
then shrugged and stuck with the HT. all current 4 strokes are too wide for a convenient fit without being annoying in some way.
this is like searching for the carb, the original purpose of this thread. i tried over 15 carbs, various configurations, with questionable results.
noone really knows anything, you just gotta nut it out yourself.
getting the proper subaru carb is the best option.