YSN Item number: YSN8565
YSN
1 Rating
87,00 €*
available immediately
Shipping weight 0,46 kg
The YSN PHBL 25 carburettor is almost identical to the original in every detail. With the manufacturer YSN we have a very good and reliable manufacturer at our side, who continues to produce the legendary carburettors for us. The quality is absolutely comparable with the Italian original and the parts are also 99% interchangeable. Only the gas slides are guided by a slightly longer centering pin in the carburetor. If Dell'Orto gas sliders are to be used, this pin in the aluminium casting can be simply taken back a little bit.

A big advantage of the PHB carburettors is their simple and good tunability as well as their insensitivity to weather changes. The PHBL shows quite fast and clearly if the mixture is too rich or too lean. A Mikuni or Keihin carburettor usually runs surprisingly well, even if tuned too lean, which unfortunately can quickly lead to a problem.

  • mixing tube: AQ264
  • needle: D26
  • nozzle: 60-65
  • main nozzle: 95-105
  • slide valve: 40 (lean)

If problems with the fuel supply are suspected, it is advisable to convert to a larger float needle valve.

BS carburettor = adjusting screws in suction direction left


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Cattaneo C. from Coccaglio BS 08/06/2025
Carburetor
Main nozzle size
102
Main nozzle type
Dellorto 6mm (6413)
Secondary nozzle type
Dellorto 5mm (1486)
Choke nozzle type
Dellorto (7746)
Needle type
Dellorto D (2265)
Slider type
Rundschieber
Choke type
manuell Hebel
Connection type Intake manifold
Gummiverbindung
Position of mixture screw
links
Fuel hose position
rechts
Fitting type
M6 x 0.75
Float chamber material
Kunststoff
Size of secondary nozzle
70
Choke nozzle size
60
Needle size
D22
Mixing tube size
AQ266
has Powerjet
nein
Slider size
40
Height
125 mm
Width
85 mm
Depth
90 mm
Relative connection height
70 mm
Connection width air filter
38 mm
Connection width of intake manifold
30 mm
Fuel hose connection width
7.7 mm
has oil connection
nein
has vacuum connection
nein
Venturi size
25 mm
Connection type Air filter
geklemmt
Position of idle throttle screw
links
 
OEM numbers (for comparison purposes only)
Dellorto:
02731
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