Dellorto 6mm Jet Kit 75-98 Motoforce Racing

The 6mm jets are compatible with any Dellorto carburetor from 12 to 17.5mm (e.g. Type PHVA, PHVB, PHBN, VHST and PHBL).

DellOrto ref: 6413 M6 x 0.75mm

Fits in carburetors:

• PHBE: Main jet
• PHBH: Main jet
• PHBL: Main jet
• PHBN: Main jet
• PHVA: Main jet
• PHVN: Main jet
• VHSA: Main jet
• VHSB: Main jet
• VHST: Main jet
• VHSH: Main jet

Carburetor adjustment:

To start, we need to keep the bike idling for about 3 minutes so it reaches temperature. Once the bike is warm.
We take the bike and give it full throttle for a few seconds and hold it at maximum RPM for about 5 seconds. Without releasing the throttle, turn off the bike using the key and proceed to remove the spark plug. Depending on the color of the spark plug, we can determine its condition, for example:
-If the spark plug is light brown, it means the bike is running well; you need to increase the main jet by about 5 or 10 points.
-And if the spark plug is just brown in color, then you need to lower the main jet by about 5 or 10 points.