O.S. MAX-R21 VER.2 1:8 Onroad engine

Japanese engine manufacturer O.S. Engines has released its latest .21 1:8 Onroad engine, the MAX-R21 VER.2.  The blue head Max series, with new laser design, is developed for 1:8 onroad racing to offer excellent cost performance that can be easily used in races for entry level to sports users.  The crankshaft and carburettor have been revised from the previous model for more ease of use.  Coming complete with an RP7 plug, exhaust seal ring, dust cap set (3mm/16mm/18mm), flywheel collet and 8.5mm reducer (purple), the engine is also offered as a combo with an EFRA2165 pipe set.

Specification
Displacement 3.49cc / 0.213 cu.in.
Bore 16.08mm / 0.633in.
Stroke 17.20mm / 0.677in.
Output 2.75ps / 2.71hp / 32,000r.p.m.
Practical RPM range 4,000-44,000 r.p.m.
Engine Weight 350g / 12.35oz.

Source: O.S. Engines [os-engines.co.jp]