Metrakit ProRace 3 Cylinder 70cc Derbi Euro 3 / 4 CNC cylinder head

Cylinder Metrakit ProRace 70cc for Derbi euro 3-4.

The ultimate evolution of one of the most renowned competition cylinders has arrived: the Metrakit Pro Race 3. This new version maintains the "HighEnd" DNA that made it famous, but addresses the weaknesses of the previous model to offer, in addition to power, total reliability.

The cylinder continues to be manufactured from a special aluminium alloy with a Nickel and Silicon Carbide coating, featuring an aggressive layout of 5 oversized transfer ports and a large exhaust outlet with boosters. However, the major improvements are found in the peripheral components: the cylinder head cover has been redesigned and is now CNC machined (anodised in gold), eliminating the sealing issues of the previous version. In addition, the piston has been completely renewed; it is no longer Athena, but an exclusive Metrakit-engraved piston of the highest quality.

Features

• Modular Cylinder Head: Two-piece cylinder head and insert system to optimise cooling under the most extreme racing conditions.
• V2 Improvements: High-precision CNC cylinder head cover and new Metrakit piston (d.47.6mm).
• Assembly requirements:
  
  • It is essential to combine it with a reinforced crankshaft of high quality, capable of withstanding high RPM.
  • A flat-slide carburettor (PWK type) of 24mm to 28mm, competition exhaust (Pro Race type or similar), and Iridium spark plug grade 10 are recommended.