**Built-To-Order. Please email and confirm delivery ETA before ordering** The Menace85 SS Engine! Upgrades: 52mm Bore x 40mm Stroke CNC Smolik Head Balanced Crank Specifications: Displacement: 85cc Bore: 52mm Stroke: 40mm Cylinder Material: Aluminum Nikasil HP: 8-9 hp Torque: 5.5-6 ft-lbs Peak RPM: 10,500-11,500 Top Speed: 55+ mph Oil Ratio: 32:1 Synthetic Optional: Porting the cylinder for increased power and reliability. Cleaning up the ports, and adjusting port timing. Additional lead time. 30 Day Limited Engine Warranty Important Notes All engines are shipped with large squish (1.0-1.4mm) to ensure safety when first tuning. You may adjust squish for increased power but be aware this will cause extra wear and tear on the bottom end. DO NOT go below 0.8mm squish. Recommend Spark Plug: NGK BR8HS Recommend oil: 32:1 Synthetic
