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OS Speed Tuned 12TZ Spec II

OS Speed Tuned 12TZ Spec II

Old 04-25-2008, 02:22 PM
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Default OS Speed Tuned 12TZ Spec II

The magnesium head is 35% lighter than standard head material, and allows for lowering the engine’s CG.

The front bearing is sealed, and the ceramic rear bearing resists heat and lasts longer than steel bearings.

The crankshaft is coated to fight friction and increase durability, and is epoxy-filled for more efficient fuel direction.

Stock Number: OSMG2031
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)

Anyone have this ? Is it good ?
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Old 04-25-2008, 03:46 PM
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You will find more information on this engine on the o.s speed 12tz thread.

Also i have the spec1 it is fast. From what i can tell the spec 2 makes up for the short comming that the spec1 had.
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