O.S. MAX-R21 On-Road O.S.Engine 1B900

O.S. MAX-R21 On-Road O.S.Engine 1B900 O.S. MAX-R21 - Racing Engine
Most of the parts have been newly designed based on the O.S.SPEED R2102, which is a high-end model, to achieve both the ease of handling and the high performance required of the 21 Racing Basic Engine. An affordable price is one of the attractions.

The perfect power plant for rookies and club racers
Newly developed crankshaft and piston / liner with the capability to upgrade later to a spec-class performer
RP7 Turbo glow plug
8.5mm carb reducer
Exhaust seal ring
Dust cap set

Specs:Displacement: 3.49cc
Output: 2.71hp @ 32,000r.p.m.
Bore: 16.08mm
Stroke: 17.2mm
Practical r.p.m. Range: 3.000～41.500
Weight: 350g