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COMBO SPEED 21XZ-B SP3 + KIT 2060SC [OS-1AN01 ]

€ 689,00
€ 469,00
- 31,00%
Prezzo iva esclusa € 384,43
5 pezzi disponibili

O.S.SPEED 21XZ-B Spec.III Combo Set (Code No. 1AN01)



The O.S. SPEED 21XZ-B Spec III is the evolution of the Spec II, which has enjoyed much success at races all over the world.

Low- to middle-range torque has been enhanced even more, providing a great advantage on tracks that require lots of power.

You’ll easily hear the difference in the engine’s roar when warming it up on a starter box, and once you’ve raced with the Spec III you’ll want to stay with it.


FEATURES

The newly developed cylinder liner features 3 scavenger ports and 3 exhaust ports, and works with the newly designed crankcase to deliver more torque with less fuel consumption.

To improve drivability, the drop-in type outer head is lighter, with a lower CG than the Spec II.

Some components could not be improved upon, such as the silicon-potted, DLC coated crankshaft with pressed-in tungsten weights.

The carburetor is also the same easy-to-tune 21J with 6.5mm restrictor.

When you add the Spec III upgrades to the legendary O.S. SPEED 21XZ-B engine, you have a dependable, high-performance powerhouse.



SPECIFICATIONS

  • Displacement: 3.49cc/0.213cu.in
  • Bore: 16.27mm/0.641 in.
  • Stroke: 16.8mm/0.661 in.
  • Power Output: 2.65ps/34,000r.p.m.(2.61hp/34,000r.p.m.)
  • Practical RPM: 4,000~42,000r.p.m.
  • Weight: 353g/12.45 oz.
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