Description
Polini Big Valve intake kit
We can offer you a kit from Polini with which you can upgrade your standard 2-valve reed valve to a 4-valve reed valve. The Polini Big Valve Kit is highly recommended, especially for setups with a larger carburetor. The 4-valve reed valve significantly increases the intake cross-section, allowing more fuel-air mixture to enter the crankcase, which results in better cylinder filling and ultimately in increased performance.
The Polini Big Valve intake 17.5 / 21mm is suitable for 50cc scooters with Minarelli vertical engine (MBK Booster / Stunt and Yamaha BWs / Slider) with racing or high-end setup. All Dell'Orto and Amal carburetors from 17.5-21mm can be used.
Contents Polini Big Valve Kit
- Reed valve housing, aluminium
- Evolution reed valve with carbon petals 0,35mm
- Rubber intake manifold 17.5 - 21 mm
- Mounting material
Intake Kit for scooter, motorcycle and moped
The intake on a 2-stroke engine is composed of a series of parts that connect the carburetor or injection unit to the engine. The aim here is to assemble the components in such a way that it leads to a better cylinder filling.
The intake system of a 2-stroke scooter or motorcycle consists of:
- Intake manifold
- Reed valve
- Sometimes with spacer / socket
What is the benefit of a tuning intake kit?
Generally, installing an optimized intake results in a straighter intake to the engine and increased intake volume to improve mixture flow and engine filling. The reed petals are usually made of fiber or carbon, which improve engine response and peak power.
Note: Installing an intake kit is often necessary when installing a larger carburetor as well as when using a sport air filter. Always remember to check carburetor settings and make sure the system is fully sealed.