Carburettor DELLORTO PHBG 21 AD rigid, without separate greasing, choke lever

If you want to preserve low consumption while having more performance than with a SHA or other model for endurance or the road for example, the PHBG model will be a very good compromise. This low-cost carburetor is of very high quality and has a multitude of adjustments: richness screw, idle jet, needle valve ... This model is the AD (also exists in BD, AS, DS, DD, black edition, or BS), it is rigidly mounted with a lever choke, you can also switch it to a cable choke without difficulty. Compared to the SHA carburetor, this model is much more precise, efficient in recovery, acceleration and peak speed. This model does not have separate lubrication.

Advice : accompany it with a 21 or 19mm pipe, carbon valve slats, pipe as much as possible aligned with the valves, you can simply use an original air filter but also a horn. Provide a range of nozzles from 86 to 100 depending on the filter used.

The carburetor is delivered as such:
Main jet small standard pitch: 80
Needle W07
40 ° cutting bushel
Needle well AU 262
Idle jet 50
Choke jet 60
Float in 4 grams

These accessories can be changed for better tuning, although these carburetors are very well preset. All spare parts and adjustments can be found here.

Summary :

Phbg AS model
Size 21mm
Pipe mounting diameter: Ø24mm
Assembly: rigid
Starter: cable (can also be leveraged)
Fixing diameter for air filter: 32mm threaded (we can also put tulips of different sizes)

Idle speed and speed screw to the right of the machine!

Spare parts and tuning parts