for Vespa Primavera/Sprint 50ccm, 4T AC, 4-VentilProduct description’Tuning’, from the English verb, ‘(To) tune’, definition : ‘To adjust/harmonise to obtain the desired performance’. We have compiled a number of tuning kits that can lead to a more harmonious motor set up. We have these drive train tuning kits available in two categories, ‘Starter’ and ‘Sport’. The only specialised tools necessary to perform variator pulley transmission adjustment or servicing are the suitable holding tools for both the variator and clutch units. This makes it possible for scooter owners themselves to be able to carry out these minor mechanical chores in the comfort and economy of their own workshop! The proud result is a ‘home-tuned’, noticeable improvement to the acceleration and throttle response of your scooter. ‘Starter’ Transmission Tuning KitsThis kit includes a reinforced ‘V-belt’ produced by MALOSSI. Its wider construction reduces power sapping slippage between the main transmission component