for Vespa LX/S/Primavera/Sprint/946 3V i.e. 125/150ccm 4T AC for tuned engines Product description If you feel the need to improve the sluggish nature of your 3 Valve LEM motor then this POLINI 171cc performance cylinder provides a step in the right direction. The added capacity that this cylinder possesses enables more power and torque to be produced ?C Hills and gradients, especially when two-up, no longer represent torture and humiliation. POLINI also include their high-tech Engine Control Unit (ECU) fuel-injection control module with this kit to ensure an optimal supply of fuel. The POLINI ECU ‘Engine Control Unit’ is the most advanced, state-of-the-art programmable fuel-injection control module that is currently on the market for four-stroke scooter motors. It allows an individual set up of the ignition and fuel injection parameters that regulate the supply of fuel to the cylinder. These adjustments are easily mastered by the rider on the ECU itself. With just a few clicks th