[1] The engine was widely adapted for other purposes, including ultralight aircraft.
Kawasaki did not condone or support the use of the engine in aircraft and it was largely supplanted in this role by the similar purpose-designed Rotax 377 aircraft engine.
Fuel is metered by a carburetor and the engine has oil injection.
[1] In its aircraft applications the 340 uses one of several available aftermarket reduction drive systems to reduce the maximum 6800 rpm to a speed more manageable for propeller use.
[1] Data from Ragwing Aviation[1] & Kitplanes[2]Related development