Description
Racing carburetor dellorto PHDG 21mm clamp flange
New release 2024 from carb specialist Dell'Orto: the PHDG carburetor. The Dellorto PHDG was specifically designed for high-performance 2- and 4-stroke engines.
This is the PHDG AN variant with a rigid clamp connection, mostly designed for Vespa Smallframe; other sizes and variants can be found here: Carburetor Dellorto PHDG.
Dellorto PHDG carburetor
The round, flow-optimized passage ensures a high air flow rate, direct throttle response and a noticeable increase in power. The special air intake profile delivers direct response as soon as the throttle is opened.
The aluminium body with aluminium float chamber is lightweight, low-wear and offers good heat dissipation; the anodized carburetor cover and float chamber screw plug round off the racing finish.
The aluminum throttle slide with special surface treatment reduces wear and ensures particularly smooth, precise operation.
It has a 46 mm air filter connection as standard, which can be expanded to 60 mm using an adapter.
Specifications dellorto PHDG 21 carburetor
- Type: PHDG
- Diameter: 21mm
- Main jet: 105
- Idle jet: 55
- Needle: W 26
- Emulsion tube: AN 262
- Connection: Rigid (clamp flange)
- Connection air filter: 46mm (60mm with adapter)
- Connection of intake manifold: 23mm
- Without vacuum / oil port
- Choke: Cable 90° (can be converted to lever choke)
Carburetor for scooters, motorcycles and mopeds
The smooth operation and optimum power output of your scooter, motorcycle or moped depends, among other things, on the carburetor, whose job is to create the right mixture of air and gasoline.
How the carburetor works
When the rider operates the throttle, the carburetor slide moves upwards, increasing the air flow that is sucked in through the air filter. The carburetor then mixes this air with petrol, creating a combustible mixture. This mixture is fed into the cylinder through the intake manifold and the reed valve.
The carburetor is equipped with jets to adjust the ratio of fuel and air and thus ensure an optimum air-fuel ratio. It is important that you adjust the carburetor settings to the setup of your engine.
Adjusting the Carburetor
Proper carburetor adjustment is critical for optimal engine operation and durability. Depending on the type of air filter, cylinder and exhaust of your setup, you will need to readjust main and pilot jets. To check the correct operation of the carburetor, you can refer to the color of the spark plug:
- White spark plug = too lean
- Black spark plug = too rich
- Brown spark plug = optimal setting
| Carburetor Dellorto PHDG 21 AN Vespa | |
|---|---|
| Article no. | L-DEL9856 |
| EAN | 3663829384095 |
| Weight | 0,45 kg |
| Brand | Dell'Orto |
| Product type | Carburetor |
| Carburator type | PHDG |
| Diameter carburetor | 21mm |
| Air filter connection | 46mm |
| Manifold connection | 23mm |
| Choke | Cable Choke |
| Ports | Without vacuum port, Without oil port |