Slow speed motocross and enduro jets - stable engine operation from the first revolution
( number of products: 94 )
Motocross and enduro slow speed nozzles (pilot jets / slow jets) are responsible for precise fuel dosing when starting and at low engine speeds. Their role is often underestimated, and they determine the engine's smooth operation in the lower range and quick response to gas. At Bajamoto you will find Keihin and Mikuni free speed nozzles for KTM, Honda, Yamaha, Husqvarna, GasGas and other motorcycles - from the best brands: ProX, All Balls, Athena, FM-Parts and Tourmax.
Why are slow speed jets so important?
The idle jet controls fuel flow at low throttle opening, when the main jet is not yet operating. If it is dirty or incorrectly selected, the engine will have trouble starting, run unevenly or stall at low speeds. A precisely selected pilot nozzle ensures smooth acceleration and stable operation even in difficult enduro hard conditions.
- easier starting in all conditions,
- stable idle speed without stalling,
- better response to gas in the lower range,
- smooth operation at low technical speeds,
- possibility of precise tuning of the fuel mixture.
Types of motocross and enduro slow speed nozzles
- Keihin jets – N424-74C, 21 Series, standard in FCR, PWK, PE carburetors
- Mikuni nozzles – VM22/210, N151.067 – used in TMX and VM,
- OEM Replacement nozzles – factory replacements with identical diameters and threads,
- Pilot nozzle sets – sets of various sizes for precise adjustment
- Tuning nozzles – for modified engines and sports intake systems.
Top brand of free speed nozzles for motocross and enduro
- Keihin – original nozzles for FCR, PWK, PE carburetors
- Mikuni – high precision nozzles for TMX and VM carburetors
- ProX – pilot jets sets with OEM accuracy
- All Balls – high-quality replacement nozzles
- Athena – adjustment kits for 2T and 4T engines,
- FM-Parts – tuning kits for enduro hard motorcycles
- Tourmax – Japanese precision and OEM Replacement fit.
How to choose slow speed nozzles for a motorcycle?
Each motocross and enduro free speed jet in Bajamoto has a detailed description of the size (e.g. #38, #42, #45), thread type and compatibility with the motorcycle model and carburetor. Examples:
- ProX Pilot Jet Keihin FCR KTM EXC-F 250–500 2017–2024
- Athena Pilot Jet Mikuni TMX Yamaha YZF 250/450 2015–2023
- FM-Parts Pilot Jet Kit Keihin PWK 38 Enduro 2T
If the motorcycle responds poorly when opening the throttle slightly or has unstable revs, the pilot nozzle probably requires cleaning or changing to a smaller/larger size. It is worth having a full set of jets for tuning the carburetor and adapting the settings to driving conditions.
How to care for pilot nozzles?
Clean the nozzles regularly with compressed air - even minor dirt may impair engine operation. Never use a wire to clean the holes - it changes the nozzle diameter and leads to incorrect dosing. When assembling the carburetor, always use clean tools and original gaskets. A dirty fuel filter is the main enemy of idle nozzles.
Reliable starting and stable revs with Bajamoto
Choosemotocross and enduro slow speed jets from brands that understand carburetor precision. With Keihin and Mikuni you will gain original quality, ProX and All Balls will ensure OEM accuracy, and Athena and FM-Parts will allow you to tune the engine to suit your driving style. WithBajamotoYour motorcycle will respond to the gas from the first revolution. 🔧
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