Kit Giglers 75-98 DELLORTO 5mm VOCA

5mm jet kit from Voca for Dellorto carburettors.

The 5mm jets are adaptable to any Dellorto carburettor with a diameter between 19 and 21mm.

Application by carburettor:

• PHBG: Main jets
• PHBL: Pilot jets
• PHBH: Pilot jets
• PHBE: Pilot jets
• VHSB: Pilot jets
• VHSA: Pilot jets
• SHBC: Main jets
• SHA

Available kits:

• From 50 to 72.
• From 75 to 98.
• From 100 to 122.

Advice for carburettor tuning:

To start, we need to let the motorcycle idle for about 3 minutes to bring the engine temperature up. Once the engine is warm, we take the motorcycle and give it full throttle for a few seconds and hold it for about 5 seconds at maximum RPM without releasing the throttle. Turn off the motorcycle and remove the spark plug; depending on the colour of the spark plug, we can determine how to proceed, for example:

• If the spark plug is milky coffee colour or lighter (like white or grey), the mixture is lean; you need to increase the main jet by 5 or 10 points.
• And if the spark plug is just black or brown, the mixture is rich, so you should reduce the jet by 5 or 10 points.
• The ideal point for a spark plug is brick red (similar to the colour of a brick).