Jet Kit Information

Fuel Needle

The design of the needle is where Dynojet spends most of its R&D time. The needle is designed to give the correct amount of fuel throughout the midrange and is also designed to allow adjustment from groove 1 to groove 6 with little or no effect below 3000 RPM. With the correct end dimensions, the needle will have little effect on the main jet regardless of needle position, this isolates all circuits from each other and ensures easy set-up of the midrange, improve throttle response and driveability - in most cases; power increases of approximately 5% throughout the entire power range can be achieved.

Main Air Jet

This jet allows air into the emulsion tube to mix with fuel being drawn from the float bowl. It controls the amount of fuel that can be pulled from the float bowl in the venturi. Dynojet alters this only to achieve the flattest possible fuel delivery curve.

Pilot Circuit

This controls 100% of the engine idle and 25% of transition onto the needle. On some models the pilot air or fuel jet is changed to provide optimum fuel economy- Correct balancing of the carburettor also ensures a smooth idle.

Main Jet

We develop our main jets to correctly serve two functions: Static load and dynamic load. The static load is the fuel received through the main jet in the upper gears, where the tachometer is moving very slow. The dynamic fuelling portion of the main jet is the amount of fuel received from the jet in the midrange portion of the power.