O.S. Engines MAX-B21 1:8 Offroad/GT engine

Japanese engine manufacturer O.S. has introduce their new MAX-B21 which is intended for 1:8 Offroad 1:8 GT Onroad use.  The MAX-B21 is easy to use from entry-level users to sports users and has excellent cost performance.  Based on the O.S.SPEED series engine, it has a well-balanced combination of smooth speed and power delivery that can be used in both onroad and offroad racing situations.
 The engine head is based on MAX-21XR-B VER.3, it has been reduced weight for better performance and finish in O.S.’s trademark blue colour.  Also the shape of the combustion chamber of the inner head has been revised to improve combustion efficiency and response in the low speed range.
 In addition has improved stable idling and an easy to adjust carburetor.

MAX-B21 Specification
Displacement – 3.49cc / 0.213 cu.in.
Bore – 16.27mm / 0.641in.
Stroke – 16.80mm / 0.661in.
Output – 2.6ps / 2.56hp / 34,000r.p.m.
Practical RPM range – 4,000-41,000 r.p.m.
Engine Weight – 361g / 12.73oz.

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