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Jets

(29 products)
Carburetor and Intake Carburetors Intake Manifolds Reed Valves and Petals Carburetor Accessories Jets Fuel System Air filter Injection System
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29
29
products
found
29
29
products
found
Jet type
Main Pilot Powerjet
Carburetor make
Bing Dell'Orto 5mm Dell'Orto SI Keihin / CVK M4 Mikuni Polini CP PWK
Brand
Dell'Orto Mikuni MotoForce MotoForce Racing Naraku Polini Stage6 Standard Parts
Price
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MotoForce
Jet Gauge Kit (0.45-1.5mm)
Article no.: MF99.00801

Jet Gauge Kit (0.45-1.5mm)

14,00 €
In stock
RRP
14,50 €
-3% Discount
Stage6
Jet Kit (x10) Stage6 Dell'Orto (d=5mm)
Article no.: 52280_A-S6HD5MMSET
1

Jet Kit (x10) Stage6 Dell'Orto (d=5mm)

14,00 €
In stock
RRP
22,00 €
-36% Discount
Stage6
Main Jet PWK Stage6 Keihin Polini CP
Article no.: 52230_A-KEIHINHD

Main Jet PWK Stage6 Keihin Polini CP

1,40 €
In stock
2,30 €
-39% Discount
Stage6
Pilot Jet Set Stage6 for PWK 35 - 55
Article no.: S6-28KH-005/ND

Pilot Jet Set Stage6 for PWK 35 - 55

24,00 €
In stock
RRP
26,00 €
-8% Discount
Polini
Main Jets Polini PWK / CP
Article no.: P370.1_AGICLEURPRINCIPALPOLINIPWKCP

Main Jets Polini PWK / CP

1,00 €
In stock
4,70 €
-79% Discount
Standard Parts
Jet Reamer
Article no.: CGN484_ALESOIR_GICLEUR

Jet Reamer

2,80 €
In stock
Polini
Main Jet Set Polini Dell'Orto SI
Article no.: P363_JETBOXDELLORTOSI

Main Jet Set Polini Dell'Orto SI

26,50 €
In stock
Polini
Main Jet Polini Dell'Orto SI
Article no.: P363_JETDELLORTOSI

Main Jet Polini Dell'Orto SI

5,70 €
In stock
Polini
Idle Jet Polini Dell'Orto SI
Article no.: P373_JETDELLORTOSI

Idle Jet Polini Dell'Orto SI

7,40 €
In stock
MotoForce Racing
Power Jet Keihin PWK
Article no.: 52240_A-KEIHINPJ

Power Jet Keihin PWK

1,50 €
In stock
MotoForce Racing
Pilot Jet MotoForce Racing for PWK
Article no.: KH-ND-SIZE

Pilot Jet MotoForce Racing for PWK

1,90 €
In stock
Dell'Orto
Pilot Jet Dell'Ortos PHBG
Article no.: 52310_A-DELLONEBENDUESE

Pilot Jet Dell'Ortos PHBG

3,00 €
In stock
3,50 €
-14% Discount
Polini
Pilot Jet Polini CP
Article no.: P343.JETPOLINICP

Pilot Jet Polini CP

3,30 €
In stock
Mikuni
Main Jet Mikuni carburetor TM / TMX / VM
Article no.: 52500_A-TMHD24MM

Main Jet Mikuni carburetor TM / TMX / VM

2,50 €
In stock
5,00 €
-50% Discount
Standard Parts
Jet Reamer Set
Article no.: MF99.00802

Jet Reamer Set

67,50 €
In stock
Polini
Main Jet Set Polini Mikuni 280 - 370
Article no.: P380.0005

Main Jet Set Polini Mikuni 280 - 370

32,50 €
In stock
RRP
35,00 €
-7% Discount
Polini
Air Correction Jet closed Polini CP carb
Article no.: P343.0750

Air Correction Jet closed Polini CP carb

2,90 €
In stock
RRP
3,40 €
-15% Discount
Polini
Air Correction Jet 0,60 Polini CP carb
Article no.: P343.0752

Air Correction Jet 0,60 Polini CP carb

2,90 €
In stock
RRP
3,40 €
-15% Discount
Polini
Air Correction Jet 0,30 Polini CP carb
Article no.: P343.0751

Air Correction Jet 0,30 Polini CP carb

3,10 €
In stock
RRP
3,40 €
-9% Discount
Polini
Main Jet Set Polini 180 - 270 for Mikuni TM / TMX / VM
Article no.: P380.0004

Main Jet Set Polini 180 - 270 for Mikuni TM / TMX / VM

34,00 €
In stock
RRP
35,00 €
-3% Discount
Polini
Main Jet Set Polini 130 - 175 for Mikuni TM / TMX / VM
Article no.: P380.0003

Main Jet Set Polini 130 - 175 for Mikuni TM / TMX / VM

35,00 €
In stock
Dell'Orto
Main Jet Dell'Orto carburetor 5mm
Article no.: 52300_A-LHD5

Main Jet Dell'Orto carburetor 5mm

1,90 €
In stock
2,50 €
-24% Discount
Naraku
Main Jet Set Naraku M4 110-130 - 11 pcs.
Article no.: NK200.09

Main Jet Set Naraku M4 110-130 - 11 pcs.

18,00 €
In stock
Standard Parts
Main Jet long 33mm Bing
Article no.: BING-LONG-SIZE

Main Jet long 33mm Bing

3,60 €
In stock
7,30 €
-51% Discount
Standard Parts
Main Jet M4 Bing
Article no.: BING-M4-SIZE

Main Jet M4 Bing

0,70 €
In stock
2,10 €
-67% Discount
Polini
Main Jet Set Polini Mikuni 380 - 470
Article no.: P380.0006

Main Jet Set Polini Mikuni 380 - 470

35,00 €
Currently not in stock
Polini
Air Correction Jet 1,00 Polini CP carb
Article no.: P343.0753

Air Correction Jet 1,00 Polini CP carb

3,10 €
Currently not in stock
RRP
3,40 €
-9% Discount
Polini
Air Correction Jet 0,80 Polini CP carb
Article no.: P343.0754

Air Correction Jet 0,80 Polini CP carb

3,10 €
Currently not in stock
RRP
3,40 €
-9% Discount
Polini
Main Jet Set Polini 80 - 125 for Mikuni TM / TMX / VM
Article no.: P380.0002

Main Jet Set Polini 80 - 125 for Mikuni TM / TMX / VM

31,00 €
Currently not in stock
RRP
35,00 €
-11% Discount

Carburetor Jets: Essential for Optimal Carburetor Tuning

An engine is powerful and reliable only when it maintains a perfect air-fuel ratio across all RPM ranges. To achieve this, you must find the ideal carburetor setting, primarily by adjusting the jets.

Functions of the Jets

Jets regulate the amount of fuel delivered into the carburetor to prepare the mixture with air.

The main jet primarily influences high RPMs when the throttle slide is fully open (wide open throttle). It is the most important jet for engine reliability.

The pilot jet / idle jet, on the other hand, affects the lower RPM range and throttle response at small slide openings.

On PWK-type carburetors, there is also a power jet. This provides a bit more fuel at very high RPMs.

finding The Right Jet

The more an engine is tuned, the sharper its power characteristics become and the more sensitive it is to carburetor settings. Therefore, you must adapt the jet size to the setup and the specific conditions: ambient temperature, altitude, and sometimes even humidity.

To find the appropriate jet after an engine modification, you can use the following indicators:

  • The engine must run cleanly: immediate revving, no stuttering or bogging in the low end, and free revving into high RPMs.
  • The spark plug reading: After a test run under full load (at least 15-20 seconds at wide open throttle), you must remove the spark plug and check the color of the electrode. Ideally, it should be tan / brown.

Signs of a jet that is too large (mixture too rich):

  • The engine struggles to reach high RPMs and stutters at the top end.
  • The spark plug is too dark, black, and oily.

Signs of a jet that is too small (mixture too lean):

  • The engine has misfires in the lower RPM range, then revs up but feels restricted at full throttle.
  • The spark plug is too light, almost white, and very dry.

Pro Tips:

To find the correct jet, you should perform several tests and increase or decrease the jet sizes step by step. A bit of patience is required here. Additionally, ensure absolute cleanliness, as any dirt in the carburetor can lead to a breakdown.

Once you have found the right jets and the carburetor is well-tuned, you should keep an eye on the altitude and ambient temperature. If your engine runs perfectly at 300 meters altitude at 15 degrees, it might not perform the same at 700 meters at 0 degrees or at 10 meters at 35 degrees.

The setting must then be adjusted as follows:

  • Decrease main jet size → when altitude increases or temperature rises.
  • Increase main jet size → when altitude decreases or temperature drops.

Note: Motocross bikes are often supplied with a user manual containing tables that specify which jets to use under which conditions.

Jets in Our Shop

Although we carry a wide variety of individual jet types for all common carburetors on the market (Dell'Orto, Gurtner, Mikuni, Keihin, etc.), we recommend purchasing a jet set with various sizes. This allows you to fine-tune the carburetor setting perfectly step by step. We offer sets from well-known brands such as Polini, MotoForce, or Stage6 with many different sizes.

Naturally, we strive to offer these jets at the best price with the fastest possible delivery times.

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