Crankshaft TXT Exhaust c.52mm Derbi euro 3-4

Crankshaft TXT Exhaust c.52mm for Derbi Euro 3-4.

This TXT Exhaust crankshaft with a 52mm stroke is a piece of engineering specifically designed for those looking to take their Derbi Euro 3 or Euro 4 engine to the next level of maximum power. It is intended to work together with the 115LMR cylinder and Metrakit crankcases, providing the solid foundation needed for a build of this calibre.

By increasing the stroke to 52 millimetres, the engine gains real displacement and allows the engine to rev higher across the entire RPM range. It is necessary to replace the stock crankshaft with this model when installing large bore kits, as the original component would not withstand the inertia or mechanical stress, eventually leading to failure. Thanks to its specific balancing, vibrations at high RPM are reduced, allowing the engine to run more smoothly and with greater reliability.

The construction stands out for its 85 millimetre diameter flywheels, which provide optimised inertia to maintain speed. In addition, it features a 105 millimetre long connecting rod and a 20 millimetre crankpin, oversized dimensions to withstand the force of a 115cc explosion without flexing or compromising the bearings, ensuring the motorcycle increases RPM with complete safety.

Technical specifications

• Stroke: 52 millimetres
• Connecting rod length: 105 millimetres
• Flywheel diameter: 85 millimetres
• Crankpin diameter: 20 millimetres
• Compatibility: Metrakit crankcases and 115LMR cylinder

Compatible models

DERBI

• Euro 3 2006-2017
• Euro 4 2018-2020