O.S. Speed 12TZ Spec II

We wrote about his motor back in May when it was first released in Japan and now that it has come state side we have more information. The O.S. Speed .12TZ Spec II engine has a magnesium head that’s 35% lighter than standard head material which helps lower the engine’s centre of graivty, essential for touring cars.  The front bearing is sealed and the rear bearing is ceramic which resists heat and lasts longer than a steel balled version. The crankshaft has also been coated to fight friction and increase durability and is lightened and epoxy-filled for more efficient fuel direction.

Click more for the specification list…

Specs:
Displacement: 0.128 cu in (2.1 cc)
Bore: 0.543 in (13.8 mm)
Stroke: 0.551 in (14.0 mm)
Practical rpm: 5000-44,000
Power Output: 1.7 hp @ 35,000 rpm
Weight: 7.34 oz (208 g)

Source: OS Engines [osengines.com]