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 an engineering component 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 required for a build of this caliber.

By increasing the stroke to 52 millimeters, the engine gains real displacement and achieves greater rev extension throughout the entire rev range. It is necessary to replace the stock crankshaft with this model when installing large-diameter kits, since the original component would not withstand the inertia or mechanical stress and would ultimately fail. 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 84.5-millimeter diameter flywheels, which provide optimized inertia to maintain speed. In addition, it features a 105-millimeter connecting rod and a 25-millimeter journal (for 6205 bearings), oversized dimensions designed to withstand the thrust of 115cc combustion forces without flexing or compromising the bearings, enabling the motorcycle to gain RPM with complete safety.

Technical specifications

• Stroke: 52 millimeters
• Connecting rod length: 105 millimeters
• Flywheel diameter: 84.5 millimeters
• Journal diameter: 25 millimeters.
• Compatibility: Metrakit crankcases and 115LMR cylinder

Compatible models

DERBI

• Euro 3 2006-2017
• Euro 4 2018-2020