Complete carburettorKit with 21 mm Polini CP tuning carburetor, fixings and special air box. When it comes to precision and build-quality, this Made in Italy carb is the finest we stock. The large intake scoop is unique in its class. Newly developed by Polini, flow-optimised aluminium construction is also an average 40% lighter. Connection diameter intake manifold: 23mm (inside), 30mm (outside) main Jet: 96. Idle Jet: 40. Needle: 14/ 22