intake manifold Polini 21/23mm for Minarelli horizontal, CPI, Keeway, 1E40QMB

Intake manifold from Poini for scooters with Minarelli horizontal engines used with original 12mm carbs. Due to the thermal loads it not uncommon for the intake manifold to develop cracks and become porous. Then it is time to replace this component. Tears lead to leaning out of the fuel-air the mixture. Therefore the combustion temperatures are too high and the motor runs rough and loses power. This could lead to serious engine damage. Connection carburetor: 23mm Inlet: 21mm