September 7, 2017

O.S Engines 21XR-B Version II 3.5cc buggy engine

Coming from O.S. Engines is the 21XR-B Version II 3.5cc nitro buggy engine. Targeting club-level racing the re-designed long-stroke engine features an easy-to-tune 21J3-I carburettor, a new aluminium cooling head for improved heat dissipation and it is upgradable using various O.S. Speed parts for areas such as the outer and inner heads, crankcase, crankshaft and more.

– Displacement: 3.46cc
– Bore: 16.27mm
– Stroke: 16.8mm
– Practical RPM: 4,000-40,000
– Power output @ 33,000 rpm: 2.45ps/2.42hp
– Weight: 380g
– Includes: P3 turbo plug

Source: O.S. Engines []


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