MXT Main Jet Set Set 2 M5 70-94 Carburetor Jets compatible with Gurtner Carburetor

This main jet set is designed for tuning carburetors of Gurtner type. Different jet values enable controlled adjustment of the fuel amount in full load range. The set supports maintenance and adjustment work on vehicles with carburetor operation.

Product features:

• Main jet set with graduated jet values
• M5 thread version
• Designed for Gurtner carburetors
• Compilation as Set 2
• Suitable for carburetor tuning and maintenance

The included jets allow for a stepwise adjustment of the fuel flow and thus a targeted influence on engine operation.

Technical details:

• Product category: Carburetor jets
• Design: Main jets
• Thread size: M5
• Jet values in the set: 70, 74, 78, 82, 84, 86, 88, 90, 92, 94

Main jets regulate the fuel amount under higher load and speed, directly influencing combustion and engine behavior.

Vehicle and model compatibility:

• Suitable for carburetors of Gurtner type
• Usage possible on various two-wheelers with Gurtner carburetor

Since vehicles may use different carburetor types depending on the year of manufacture and version, the actual carburetor design is decisive.

Mounting and application instructions:

• Installation by replacing the existing main jet in the carburetor
• Tuning by incrementally adjusting the jet size
• Carburetor access varies depending on the vehicle model

Careful tuning supports stable engine operation and an adjusted mixture formation.

Note for checking before purchase:

• Please check before purchase if a Gurtner carburetor with M5 main jet is installed. The jets are exclusively suitable for this carburetor design.

Short info: Carburetor - Installation, Adjustment & Tuning

Installation: Mount the carburetor without tension, check intake manifold and seals for intake air leaks, adjust throttle cable to move smoothly, ensure fuel supply (petrol, oil, and vacuum).

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

Tuning:

• Main jet = full throttle / high load
• Needle position = part load & acceleration
• Pilot jet = idle & starting (usually does not need to be changed)

Check: Inspect 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 proprietary brand of Heavy Tuned and stands for high-quality replacement and tuning parts for motorcycles, scooters, and gear mopeds.

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

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