Metrakit Hyper Pro Crankcase cylinder FL Derbi euro 3-4

Metrakit Hyper Pro FL cylinder crankcase Derbi euro 3-4 engine.

After months of development and testing on the bench and tracks, the Metrakit Hyper PRO crankcase arrives, unlike the other crankcase with reference 700C0080 it has been specially developed to fit FL cylinders without having to make modifications or additional machining. 

It has been specifically designed for high-level setups on Derbi Euro 3 and Euro 4 crankcases. Manufactured in high-strength cast aluminum, optimized to withstand mechanical demands far above those of a stock engine, without compromising reliability.

The design is based on the original crankcase, but with key modifications that make it ideal both for extreme street setups and for competition use. Compared to OEM crankcases, which begin to suffer structural fatigue and deformation with engines over 30-35 HP, the Pro Race withstands power close to 40 HP thanks to its structural reinforcement and new geometry.

Among its main technical advantages are:

• Oversized Needle bearing for the balance shaft
• More space for large carburetors
• Supports larger diameter crankshafts
• Prepared for Ø14 mm swingarm shaft: just drill, without opening the crankcase.
• Elimination of the starter motor
• Compatible with all original Derbi Euro 3 and 4 components, which allows you to keep many OEM parts.
• Supports V-Force 3 and 4R type reeds
• Oversized crankshaft bearings
• Improved thermal conductivity
• Adaptable to FL type cylinders

-Includes central gasket and screw kit.

* The crankshaft bearings are of different dimensions than the original Derbi ones, the ones they use are 6304-TN9C4