The VMC CRONO 187cc thermal group is engineered for peak performance and precision.
Key Specifications:
• Bore and Stroke: 63mm bore, 60mm stroke
• Cylinder: Aluminium with Nikasil coating by Gilardoni
• Origin: Entirely produced in Italy
• Transfer Ports: 7 transfers, boosted exhaust port, main port plus 2 smaller boost ports
• Piston: Meteor double-ring piston with biconical pin and flat crown
• Cylinder Head: CNC machined aluminium head with specific fin shape for better cooling
• Spark Plug: Central position for better combustion
• Exhaust Manifold: Zinc-plated steel with Viton O-ring seal
Important Note:
This kit requires a 60mm stroke crankshaft with a 110mm connecting rod.
Performance Highlights:
• Optimal Timing: Transfer port timing at 120 degrees and exhaust port timing at 178 degrees
• Enhanced Cooling: Recessed squish band and 8 fixing points ensure superior cooling
• Complete Kit: Includes a paper cylinder gasket kit with various thicknesses for the cylinder base
We recommend combining this cylinder with a reed valve intake for maximum performance and driving pleasure. Elevate your Vespa’s power and reliability with the VMC CRONO 187cc kit—crafted to meet the needs of the most demanding riders.

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You can order online at www.ve-uk.com or call us on 0115 946 2991.