Dellorto Pilot Jets for 19-21mm Carbs PHBG Carbs Only 5mm
Pleaae make sure your pilot jet matches pic and carb.
Your carb will say which one it is right on the side of carb it will have the letters PHBG if this is correct pilot jet for your carb.
On on any air filter, exhaust or cylinder kit change the pilot jet should be increased for best performance. There are also times when no mods or upgrades are done that the pilot jet can be increased or decreased.