Kit Cylinder and Crankshaft Italkit 80cc c.43mm Derbi Variant Start 3

Kit Cylinder and Crankshaft Italkit 73cc 40mm stroke for Derbi Variant Start 3.

High-displacement engine kit from Italkit of 73cc with a 40-millimeter stroke for Derbi Variant Start 3, it will significantly increase the engine's power and torque throughout the entire rev range.

The kit includes a Cylinder with a 48-millimeter diameter and a 2-Piston rings piston with a 12-millimeter pin. By incorporating a racing crankshaft with the original 40-millimeter stroke, precise balancing is ensured, capable of withstanding the engine's new demands. In addition, the two-piece cylinder head with removable insert optimizes combustion chamber cooling, which helps protect the engine against excessive temperature under demanding operating conditions.

It is recommended to install this kit with a larger-diameter Carburettor and an exhaust to get maximum performance.

Technical characteristics

• Kit reference: K.12.574.G
• Displacement: 73cc
• Cylinder diameter: 48 mm
• Stroke: 40 mm (original stroke)
• Piston pin: 12 mm
• Number of Piston rings: 2 Piston rings
• Cylinder head: 2-piece cylinder head (cover and insert)
• Crankshaft: Racing crankshaft C-40 mm Ø12 mm (reference CB.12.5)
• Complete Cylinder reference: CI.12.573.G
• Gasket set reference: VJ.12.11

Compatible models

DERBI

• Variant Start 3