for Vespa LX/S/Primavera/Sprint/946 3V i.e. 125/150ccm 4T AC Euro4 aluminium 61mm w/o cylinder head incl. POLINI ECU fuel injection module TUNING SPORT – high-performance 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this cylinder possesses enables more power and torque to be produced ?C Hills and gradients, especially when two-up, no longer represent torture and humiliation.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.