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    • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
  • O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition

    O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition

    O.S. Speed

    MSRP:
    Was:
    Now: $518.39
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    SKU:
    WallaceR21
    Width:
    5.00 (in)
    Height:
    7.00 (in)
    Depth:
    5.00 (in)

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    • Overview

    Product Description

    O.S. SPEED R21 EUROSPEC II - Hall Of Fame Edition 

    This engine inherits the smooth and easy-to-use feeling of the predecessor, O.S. SPEED R21 EURO Spec., And by reviewing the counterbalance of the crankshaft, low and mid end power delivery has been improved. The smooth RPM drop and idling stability are also improved, and the optimum performance is demonstrated even in the long and harsh race scene. Succeeding the previous model, every part has been improved including the outer head with new design to improve the cooling performance.

    Features:

    • 1/8 on-road racing engine
    • New cooling-head design.
    • New combustion chamber with o-ring
    • New Crankshaft.
    • New sleeve design with extra cooling-ports on the lower exhaust side.

    Specifications
    Content: 3.49 cc 
    Bore: 16.08mm  
    Stroke: 17.20mm  
    HP: 2.8 ps / 2.76 hp at 33000 r.p.m.
    Practical range: 4000-45000 r.p.m.
    Weight: 340g

     

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    O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition
    O.S. Speed
    O.S. Speed R21 - Wallace Motorsports - Hall of Fame Edition

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