
Features
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- Hardened, chrome-plated 4-port cylinder and liner for high durability and long life
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- Specially coated crankshaft with precision ceramic bearing that greatly reduces friction, plus a Tungsten weight for added balance
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- Machined steel piston features parallel rings that trap fuel oils and use them as a seal to enhance compression and boost power
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- Reshaped crankcase core ensures smoother air flow and more consistent performance
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- Slide valve carb with 8mm and 9mm carb restrictors allow tuning to specific track conditions; low-end needle adjusts from side to side for maximum adjustment ease
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- V-shaped aluminum head provides fast heat dissipation
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Tower Hobbies $15.00 Gift Certificate when you purchase an O.S. Speed 21VZ-B V-Spec AL from this page.
To receive your Free Item you must use the BUY NOW button on this page. |
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The latest O.S. Speed-tuned V-Spec engine combines factory-tuning and an aluminum heatsink head for exceptional cooling and performance! A specially coated crankshaft with a ceramic bearing reduces friction, while a tungsten weight provides extra balance. Best of all, the 21H 3-needle carb lets racers fine-tune their vehicles on the toughest tracks!
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Specifications
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Displacement: 0.21 cu in
Bore: 0.65 in
Stroke: 0.63 in
Practical rpm Range: 3,000 – 40,000
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Output: 2.5hp @ 34,000 rpm
Weight: 12 oz
Requires: T-2060SC WN tuned silencer, #203 air cleaner assembly, and Fuel
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