O.S. SPEED B21 ADAM DRAKE EDITION 4

O.S. SPEED B21 ADAM DRAKE EDITION 4

O.S. ENGINE
SKU:
AD4
MPN: AD4
$645.00
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Description
O.S. Engines would like to introduce new O.S.SPEED B21 ADAM DRAKE 4. Latest collaboration engine with world famous O.S. Team driver Adam Drake. Cylinder liner, crankshaft, outer head has been redesigned to Adam Drake’s spec for better balance, more torque and more power for better driving performance.



Spec---------------------------
Displacement： 3.49 cc / 0.213cu.in.
Bore: 16.4mm / 0.646 in.
Stroke: 16.55mm / 0.652 in.
Output :2.65 ps / 2.61 hp / 34,000 r.p.m.
Practical RPM range: 4,000-42,000 r.p.m.
Engine Weight:352g / 12.42 oz.

Standard accessories---------------------------
O.S. SPEED P3 glow plug
Reducer　6II (blue) AL2・Reducer　8mm (blue) AL
Exhaust seal ring
Dust cap set 3mm/16mm/18mm

Features

Advice and testing was done by Roar Champion Adam Drake.


 

Newly designed cylinder liner uses 3 port design. Changing the exhaust dimension for more torque.

 

Changed crankshaft’s inner diameter for better response in low to middle range.

 

New outer head has double anodized black and blue with new laser design and at same time lighter and better balance compared to the previous model.

 

Inner head’s combustion chamber has been redesigned combustion efficiency has been improved, resulting in more torque.

 

Comes with φ6II and φ8 blue anodized reducers