All the supertigers I have had, has "midrange transition issues". Starting is never a problem. Idle is good and low, full throttle is great but they go rich in the midrange[:@][]. Rotating the spraybar and fourstroke glowplugs would help a little bit but not solve the entire problem.

If midrange transition is important for your application then forget the ST and instead look at the list below.

Webra, Irvine, moki, mvvs, os, jett, ys and some more