New PHB carburetors
PHB carburetor
The YSN PHB carburettors correspond to the original in almost every detail. We currently have the following models on offer:
With the manufacturer YSN we have a very good and reliable manufacturer at our side who continues to produce the legendary PHB carburettors for us. The quality is absolutely comparable to the Italian original and the parts are 99% interchangeable. Only the throttle slide is guided via a slightly longer centering pin in the carburetor. If the Dell ”Orto throttle slide is to be used, this aluminum cast pin can simply be withdrawn a little.
Buy the PHB carburetor here
Advantage of the PHB carburettor
A big advantage of the PHB carburettors is their easy and good tunability as well as their insensitivity to changes in weather. The PHBH shows quickly and clearly whether the mixture is too rich or too lean. A Mikuni or Keihin carburetor usually runs surprisingly well, even if the tuning is too lean, which unfortunately can quickly manifest itself in a Klemmer.
PHB carburetor spraying
Most scooter engines have the following basic spraying for the PHB carburetor series as a good starting point proven:
PHBH 28
- Mixing tube: AV264
- Needle: X2 or X3
- Idle jet: 55
- Main jet: 120-145
- Slider: 30 (fat) or 40 (leaner)
PHBL 25
- Mixing tube: AQ264
- Needle: D26
- Idle jet: 60-65
- Main jet: 95-105
- Slider: 40 (lean)
If problems with the fuel supply are suspected, it is advisable to convert to a larger float needle valve (# 250).
BS carburetor = adjusting screws on the left in suction direction
Buy the PHB carburetor here
