O.S. 1DR00 Speed R21 Euro II Precision Racing Engine  [OS-1DR00]

O.S. 1DR00 Speed R21 Euro II
Price:
£248.69
Brand:
O.S. Engine
Model:
OS-1DR00
Condition:
Brand New
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O.S. 1DR00 Speed R21 Euro II Performance Summary

The O.S. 1DR00 Speed R21 Euro II is a race-focused engine designed for drivers who prioritise control and reliability. It combines refined construction with a usable powerband suited to competitive environments.

Controlled Power and Rev Response

This engine delivers a predictable power curve and crisp rev response, allowing drivers to fine-tune throttle inputs for maximum lap consistency on varied circuits.

Serviceability and Long-Term Use

Constructed from quality materials, the R21 Euro II is built to endure frequent racing while remaining straightforward to service and adjust for ongoing performance maintenance.

Specifications

  • Displacement: 3.49cc
  • Bore: 16.08mm
  • Stroke: 17.20mm
  • Practical RPM Range: 4,000 - 42,000 RPM
  • Weight: 340g

The O.S. 1DR00 Speed R21 Euro II suits experienced pilots who want a stable, tuneable engine for lap consistency and reliable track performance.

How do I fine-tune the idle and midrange?

Adjust the low and high needles in small increments while monitoring exhaust residue and throttle response. Allow the engine to cool between changes to evaluate settings accurately.

What should I look for in glow plugs?

Choose a reliable glow plug rated for your typical running conditions. A stable glow plug helps maintain consistent starts and steady combustion under load.

Is this engine suited to sprint and endurance formats?

Yes, its balance of durability and tunability makes it adaptable to both short sprint events and longer endurance runs when tuned for temperature and fuel consumption.

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