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O.S. Speed B2103 .21 Off Road


O.S. Speed B2103 .21 Off Road

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We are proudly introducing our new OS Speed B2103 Type-R and Type-S 3.5cc buggy engines, which not only have been designed newly, but also modified technically for improving their performance over excellent results at past numerous competitions. For corresponding driver’s preference also the course layout, two types B2103 Type-R and Type-S with different characteristics are in lineup. Both of them are long stroke engines φ16.27 mm x 16.80 mm. The most suitable and featured crankcase designed for buggy engine has been engraved with OS SPEED log as you can see in the pic, and the engine utilized a cooling head for the best possible cooling in high ambient temperatures. More than that, both engines come with a rear ceramic bearing and the traditional OS techniques DLC-coated crankshaft coming with tungsten balanced. For enhancing vibration reduction and preventing dust, the inner head also was adopted silicon O-ring.


Displacement :3.49cc

Bore : 16.27mm

Stroke : 16.80mm

Output: 2.64hp/34,000RPM

Practical RPM range: 4,000-42,000

Weight : 352g

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