M6 Nozzle Carburetor Main Jet 55-150 for Dellorto PHBN PHVA Modification

This M6 nozzle carburetor main jet gives you precise control over fuel metering in your carburetor. Whether you are fine-tuning a performance engine or restoring a classic vehicle, selecting the correct main jet size is critical for optimising air-fuel mixture. This jet is specifically designed for carburetor modification and fits Dellorto PHBN and PHVA models. With a wide range of sizes from 55 to 150, you can dial in the exact flow rate your engine requires.

Features and Construction

Each jet is a single M6 threaded brass nozzle made for accurate fuel delivery. The brass material resists corrosion from petrol and additives, ensuring consistent performance over time.

Material and Build

The jet is constructed from brass, a standard material for carburetor metering parts. Brass offers reliable dimensional stability and resistance to fuel degradation. The M6 thread fits standard Dellorto carburetor jet holders.

Size and Practical Fit

Sizes are marked numerically from 55 to 150, with 31 individual increments. This includes steps at 55, 58, 60, 62, 65, 68, 70, 72, 75, 78, 80, 82, 85, 88, 90, 92, 95, 98, 100, 102, 105, 108, 110, 112, 115, 120, 125, 130, 135, 140, 145, and 150. Each jet is sold as a single piece.

Uses and Placement

This jet is intended for carburetor modification and tuning. It replaces the main metering jet in Dellorto PHBN and PHVA carburettors.

Event or Professional Use

Tuners and mechanics use this jet for dynamometer tuning, track days, and performance builds. Changing the main jet allows precise adjustment of the fuel curve at wide-open throttle.

Everyday Home Use

Enthusiasts restoring mopeds, scooters, or motorcycles with Dellorto carburettors can fine-tune jetting for altitude changes or aftermarket exhausts. The process is straightforward with basic tools.

Benefits and Buying Value

Buying a single jet lets you target exactly the size you need without buying a full kit. The wide range ensures you can find the correct flow for most tuning requirements.

Reuse and Low Maintenance

Brass jets last many years if kept clean. Regular cleaning during carburetor servicing maintains metering accuracy. Replacement is only needed if the orifice becomes damaged.

Why Choose This Product

This jet offers direct compatibility with common Dellorto carburetors. The size range covers nearly all typical main jet needs for street and competition use.