MXT Main Jet Set Maxi Set M5 60-130 Carburetor Jets compatible with DellOrto Carburetors

This main jet set is designed for comprehensive tuning of carburetors with a 5 mm main jet. The wide range of jet sizes covers a large adjustment area and supports modifications for different engine and carburetor configurations. The set is suitable for maintenance, repair, and tuning work on the carburetor.

Product features:

• Main jet set with a wide range of sizes
• Maxi set with 15 individual jets
• M5 design for 5 mm main jet
• Designed for DellOrto carburetors
• Suitable for carburetor tuning in various engine settings

The extensive selection of jet sizes enables gradual and traceable adjustments of fuel flow over a wide load range.

Technical details:

• Product category: Carburetor jets
• Type: Main jets
• Thread size: M5
• Number of jets: 15 pieces
• Jet sizes in the set: 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130

Main jets control the fuel quantity at open throttle and influence mixture formation, combustion, and engine operation.

Vehicle and model compatibility:

• Compatible with DellOrto carburetors with a 5 mm main jet
• Can be used with 19 mm and 21 mm carburetors with corresponding main jet design
• Can be used as a 5 mm pilot jet in PHBL and VHS carburetors

Since different jet types may be installed depending on the vehicle, carburetor type, and year of manufacture, the specific carburetor design is crucial.

Installation and application instructions:

• Replace the jet in the carburetor according to the existing design
• Tune by gradually adjusting the jet size
• After each change, check engine operation and spark plug condition

A careful adjustment of the main jet supports stable mixture formation and smooth engine operation.

Note for checking before purchase:

• Please check before purchase whether a carburetor with a 5 mm main jet is installed and if the jet type matches the respective carburetor configuration. The jets are suitable only for the specified carburetor types.

Short info: Carburetor - Installation, Adjustment & Tuning

Installation: Mount the carburetor without tension, check intake manifold and gaskets for air leaks, adjust throttle cable for smooth operation, ensure fuel supply (petrol, oil, and vacuum).

Basic setting: Mixture screw usually 1.5 - 2.5 turns open, idle screw set for stable idle, always tune the engine warm.

Tuning:

• Main jet = Full throttle / high load
• Needle position = Partial load & acceleration
• Pilot jet = Idle & starting (usually does not need to be changed)

Check: Check the spark plug condition

• white = too lean
• black = too rich
• brown = optimal

Important: After changes to the air filter, exhaust, or cylinder, a new carburetor tuning is absolutely necessary.

About the manufacturer MXT

MXT is the powerful in-house brand of Heavy Tuned and stands for high-quality replacement and tuning parts for motorcycles, scooters, and automatic mopeds.

As a reliable alternative to OEM parts, MXT offers a wide range of cylinder kits, carburetors, and crankshafts, as well as variomatic components, body parts, and batteries. The products impress with solid workmanship, precise fitting quality, and a strong price-performance ratio.

Ideal for riders looking for durable replacement parts and tuning parts for many vehicle models.