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.

Specifications:
– 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 [osengines.com]



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