Polini "Big Valve" 2-Valve Intake System for PHBG / CP Carburetors | Puch
“Big Valve” intake system with a two-valve diaphragm insert for PHBG / CP carburetors on your Puch moped.
Due to its design, this version is often found on the market under the name “4-valve diaphragm,” but technically it is a two-valve diaphragm insert.
Thanks to the 24 mm diameter intake port, Dell'Orto PHBG AS or CP carburetors can be used with clamps. The intake system fits the Polini 43.5 mm cylinder kit without requiring any modification or cutting of the cooling fins. After installation, the carburetor will be positioned at a slight angle to the side.
All parts shown in Figure 1 are included in the package.
You can find additional diaphragm inlets, the matching cylinder kit, as well as intake manifolds and carburetors in the accessories section.
A quality product from the Italian manufacturer Polini.
| Manufacturer | Polini |
| Material | Aluminum, Plastic |
| Surface | glass bead blasted |
| Area of application | Tuning, Racing |
| Number of flaps | 4 pcs |
| Membrane material | Carbonite |
| Thread type | M5x0.8 (standard thread) |
| Number of fixing points | 4 pcs |
| Thick membrane platelets | 0.3 mm |
| Ø inside | 19 mm |
| Ø outside | 24 mm |
| Ø mounting hole | 5.2 mm |
| Camouflaged | No |
| Mounting type | Screws |
| Puch | E50 ZA50 (fan-cooled) Z50 (X30 Sport) |
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