O.S. Speed Tuned .21 VZ-B V-Spec

We wrote about the O.S. Speed Tuned .21 VZ-B V-Spec back in May when it was first shown and now its available to buy. The engine sports an aluminum heat sink head combined with special factory tuning which makes this a more efficiently cooled .21 VZ-B V-Spec competition engine. The specially coated crankshaft features a precision ceramic bearing that greatly reduces friction, plus a Tungsten weight for added balance, while a double adjustment carb allows for ultra-fine tuning for demanding race conditions.

Click here for specifications…

Specifications:
– Displacement: 0.211 cu in (3.46 cc)
– Bore: 0.653 in (16.6 mm)
– Stroke: 0.630 in (16.0 mm)
– Practical rpm range: 3000-40,000-
– Output: 2.5 ps @ 34,000 rpm
– Weight: 12 oz (345.5 g

Source: OS Engines [osengines.com]