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Carburetors

(96 products)
Carburetor and Intake Carburetors Intake Manifolds Reed Valves and Petals Carburetor Accessories Jets Fuel System Air filter Injection System
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Carburator type
Mikuni TM PHBG PHBH PHBL PHBN PHDG PHVA PHVB Polini CP PWK VHST
Carburetor diameter
12mm 15mm 16mm 17,5mm 17mm 18mm 19mm 20mm 21mm 22mm 23mm 24mm 25mm 26mm 28mm 30mm 32mm 33mm 34mm 35mm 38mm
Brand
Dell'Orto Keihin Malossi Mikuni MotoForce MotoForce Racing Polini Stage6 Stage6 R/T Standard Parts Top Performances
Colour
Red Silver Néochrome
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Polini
Carburetor Polini CP Evolution d=24mm lever choke
Article no.: P201.2400
1

Carburetor Polini CP Evolution d=24mm lever choke

160,00 €
In stock soon
RRP
177,00 €
-10% Discount
Polini
Carburetor Polini CP Evolution 21mm lever choke
Article no.: P201.2104

Carburetor Polini CP Evolution 21mm lever choke

170,00 €
In stock soon
RRP
177,00 €
-4% Discount
Keihin
Carburetor Keihin PWK 28mm
Article no.: KH-900109

Carburetor Keihin PWK 28mm

296,00 €
In stock soon
Dell'Orto
Carburetor Dell'Orto PHBG DS d=21mm
Article no.: L-DEL2632
1

Carburetor Dell'Orto PHBG DS d=21mm

80,50 €
In stock soon
RRP
87,50 €
-8% Discount
Polini
Carburetor Polini PWK 30
Article no.: P201.0169

Carburetor Polini PWK 30

110,00 €
In stock soon
RRP
129,00 €
-15% Discount
Polini
Carburetor Polini PWK 28
Article no.: P201.0168

Carburetor Polini PWK 28

121,00 €
In stock soon
RRP
129,00 €
-6% Discount
Polini
Carburetor Polini PWK 26
Article no.: P201.0167

Carburetor Polini PWK 26

113,00 €
In stock soon
RRP
129,00 €
-12% Discount
Polini
Carburetor Polini PWK 24
Article no.: P201.0166

Carburetor Polini PWK 24

110,00 €
In stock soon
RRP
129,00 €
-15% Discount
Dell'Orto
Carburetor Dellorto PHBG 19 AD
Article no.: L-DEL2513

Carburetor Dellorto PHBG 19 AD

105,00 €
In stock soon
Stage6 R/T
Intake Kit Stage6 R/T 28mm Derbi
Article no.: S6-3919310

Intake Kit Stage6 R/T 28mm Derbi

240,49 €
Currently not in stock
245,40 €
-2% Set-Rabatt
Stage6 R/T
Intake Kit Stage6 R/T 28mm Minarelli AM6
Article no.: S6-3918810

Intake Kit Stage6 R/T 28mm Minarelli AM6

273,81 €
Currently not in stock
279,40 €
-2% Set-Rabatt
Standard Parts
Carburetor Mikuni 16mm Yamaha DT50MX / DT50R before 1995
Article no.: MF16.15002

Carburetor Mikuni 16mm Yamaha DT50MX / DT50R before 1995

40,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHVA 17,5 OD Aprilia RS4 Euro 4
Article no.: L-DEL8563

Carburetor Dellorto PHVA 17,5 OD Aprilia RS4 Euro 4

110,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHBG AS 17 metal flange
Article no.: L-DEL2520

Carburetor Dellorto PHBG AS 17 metal flange

112,00 €
Currently not in stock
Standard Parts
Carburetor PHBG 17.5mm metal flange / plastic float bowl
Article no.: MF16.19989

Carburetor PHBG 17.5mm metal flange / plastic float bowl

51,00 €
Currently not in stock
Standard Parts
Carburetor 18mm Honda MT / MB / MTX
Article no.: 29410

Carburetor 18mm Honda MT / MB / MTX

28,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHBN 16 FS cable choke Yamaha BW's 100
Article no.: L-DEL3062

Carburetor Dellorto PHBN 16 FS cable choke Yamaha BW's 100

95,50 €
Currently not in stock
Dell'Orto
Carburettor 17mm Dellorto PHBG 17 DD
Article no.: L-DEL2684

Carburettor 17mm Dellorto PHBG 17 DD

102,00 €
Currently not in stock
Keihin
Carburetor Keihin PWM 38mm
Article no.: KH-016170

Carburetor Keihin PWM 38mm

407,00 €
Currently not in stock
Dell'Orto
Carburettor Dellorto VHST 28 BS 9357
Article no.: L-DEL9357

Carburettor Dellorto VHST 28 BS 9357

168,00 €
Currently not in stock
Standard Parts
Carburetor YSN 30 BS type PHBH with lever choke
Article no.: SP-49089

Carburetor YSN 30 BS type PHBH with lever choke

85,00 €
Currently not in stock
RRP
93,50 €
-9% Discount
Standard Parts
Carburetor YSN PHBL AM, SD, BT 25mm with lever choke
Article no.: SP-48790

Carburetor YSN PHBL AM, SD, BT 25mm with lever choke

85,00 €
Currently not in stock
RRP
93,50 €
-9% Discount
Dell'Orto
Carburetor Dellorto PHDG 24 AN 2-stroke
Article no.: L-DEL9857

Carburetor Dellorto PHDG 24 AN 2-stroke

199,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHDG 21 AN 2-stroke
Article no.: L-DEL9858

Carburetor Dellorto PHDG 21 AN 2-stroke

179,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHDG 18 AU karting
Article no.: L-DEL9854

Carburetor Dellorto PHDG 18 AU karting

167,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHDG 18 AN karting
Article no.: L-DEL9860

Carburetor Dellorto PHDG 18 AN karting

167,00 €
Currently not in stock
Standard Parts
Carburetor 21 PHBG metal flange
Article no.: CGN525523

Carburetor 21 PHBG metal flange

39,50 €
Currently not in stock
Malossi
Carburetor Kit Malossi PHBG 21mm Derbi Euro 2 / 3 / 4
Article no.: M1613525

Carburetor Kit Malossi PHBG 21mm Derbi Euro 2 / 3 / 4

196,00 €
Currently not in stock
RRP
230,00 €
-15% Discount
Standard Parts
Carburetor 24mm Mikuni VM24
Article no.: MOF-44694

Carburetor 24mm Mikuni VM24

58,00 €
Currently not in stock
Standard Parts
Carburetor 20mm Mikuni VM20
Article no.: MOF-44695

Carburetor 20mm Mikuni VM20

39,00 €
Currently not in stock
Standard Parts
Carburetor PHBH 28
Article no.: CGN478722

Carburetor PHBH 28

99,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHBG 21 AS metal flange
Article no.: L-DEL2557

Carburetor Dellorto PHBG 21 AS metal flange

108,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHBG 19mm BD cable choke
Article no.: L-DEL2594

Carburetor Dellorto PHBG 19mm BD cable choke

113,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHBG 15 AS
Article no.: L-DEL2518

Carburetor Dellorto PHBG 15 AS

122,00 €
Currently not in stock
Dell'Orto
Carburetor Dellorto PHBG 21 DS Black lever choke
Article no.: L-DEL02699

Carburetor Dellorto PHBG 21 DS Black lever choke

131,00 €
Currently not in stock
Stage6 R/T
Carburetor VHST 28 Stage6 R/T
Article no.: S6-30RT-VHST28

Carburetor VHST 28 Stage6 R/T

219,00 €
Currently not in stock
RRP
243,00 €
-10% Discount
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12

motorcycle carburetors: the complete guide

The carburetor is the key component of the intake system and is responsible for preparing the fuel-air mixture; it has a major impact on your motorcycle's performance and throttle response. Whether as a reliable OEM quality replacement like the Dell'Orto PHBG for standard 50cc engines, as a tuning upgrade with a Stage6 Racing or Polini CP Evolution or for optimum tuning of the existing carburetor - this guide will help you make the right choices.

Here you will find all the information you need to select, install, adjust and maintain the right carburetor: from inexpensive OEM / replica carburetors to sports and racing models for the most popular 50cc bikes: Derbi Senda 50, Rieju MRT, Sherco SM 50 / SE 50, Aprilia SX / RS 50, Yamaha DT 50, Beta RR 50, Fantic Enduro 50 and many more.

What is a carburetor and how does it work?

The carburetor generates and regulates the air-fuel mixture allowing the engine to run efficiently and smoothly.

As air flows through the carburetor, a vacuum is created that draws fuel through the jets. When you open the throttle, the slide rises, allowing more air in, while the carburetor adds more fuel. The main jet, idle jet and needle control the mixing ratio depending on the engine speed and load. The result: clean combustion, stable performance and direct throttle response.

For 50cc supermotos, which usually rev high and are also used on dirt tracks or racetracks, a high-quality, correctly tuned carburetor is crucial to ensure that you get a powerful and reliable engine that can be used over the entire RPM range.

Main carburetor components

If you want to tune the engine precisely across the entire RPM range, you should know and understand the individual components of a carburetor. Each part fulfills a specific function.

  • Float chamber and float: The float chamber stores fuel and the float keeps the level constant.
  • Jets: Meter the fuel. The main jet controls high RPMs, the idle jet controls low RPMs. The needle regulates mid-range throttle.
  • Needle: Connected to the slide valve, regulates the fuel flow in the mid throttle range.
  • Slide: Regulates the air flow depending on the throttle position. Depending on the design, there are round slide valves, flat slide valves or vacuum slide valves.
  • Choke: Helps with cold starts, either manually or automatically.

Carburetor types for 50cc motorcycles: original, sport and racing

The choice depends on the intended use, the engine setup and your personal experience. There is no "best" carburetor, but the most suitable carburetor for each application.

✅ Carburetor by intended use

ORIGINAL carburetor

Carburetors installed ex works are tuned to offer an optimum compromise between fuel consumption and reliability. Original carburetors and replica carburetors in OEM quality are the ideal replacement carburetors for 50 cc Supermotards / Enduro bikes for everyday use.

  • Diameter: 12-17.5 mm
  • Strengths: Inexpensive, durable, with road approval, low consumption, easy adjustment
  • Use: Standard engines, original components (exhaust, air filter, standard cylinders)
  • Recommended: Original carburetor, Dell'Orto PHBN/PHVA, Mikuni, Motoforce standard carburetor

SPORT carburetor

For lightly tuned engines. They improve flow and throttle response and provide noticeably improved acceleration without sacrificing reliability or increasing fuel consumption.

  • Diameter: 17.5-21 mm
  • Strengths: Better throttle response, acceleration and top speed compared to the standard carburetor
  • Use: Standard to slightly tuned (50-70 cc cylinder, performance exhaust, pod air filter)
  • Recommended: Dell'Orto PHBG 19-21, Polini CP 19-21 mm, Stage6, Motoforce Racing, Voca Racing

HIGH-PERFORMANCE carburetors: RACING & High End

For high-performance and racing setups. They supply engines with larger displacements with maximum flow and direct throttle response.

  • Diameter: 19-38 mm
  • Advantages: Maximum flow, very direct throttle response and maximum precision across the entire speed range
  • Use: Only recommended for heavily tuned engines, with racing exhaust, reed valve with carbon reeds and high-flow filters
  • Requires: Experience in carburetor tuning and professional fine tuning
  • Recommended: Keihin PWK, Dell'Orto VHST, Mikuni TM, Stage6 R/T, Polini CP Evo

⚠ IMPORTANT: Carburetors over 17.5 mm can cause problems with road approval. For road traffic, you should always check the applicable regulations.

✅ Carburetor by slide type

  • Round slide: The most common type. It moves vertically and is controlled via the throttle cable. Offers direct response, simple adjustments with needles of different tapers and high reliability. Carburetor models such as Dell'Orto PHBG and Polini CP use this system.
  • Flat slide: Shortens the intake path and improves the air flow. This ensures even more direct throttle response, more precise fuel metering and better top-end performance - ideal for sporty setups and performance-oriented engines.
  • Diaphragm carburetor (CV): The slide is not actuated directly via the throttle cable, but via a diaphragm that reacts to the vacuum generated by the engine. The carburetor automatically adjusts the mixture to the actual requirements. This ensures very smooth engine running, lower consumption and a progressive, smooth throttle response (less sporty).

Carburetor tuning for 50cc supermotos: the right balance

The performance of a 50cc motorcycle depends not only on the carburetor, but also on how all the engine components work together. Running a carburetor that is far too large on a stock engine or expecting a high-performance cylinder to develop its full potential with a carburetor and intake system that are too small are common mistakes: performance goes down and the risk of damage increases.

A few basic principles for carburetor tuning

Before you change the carburetor or install a sport/racing cylinder, you should observe a few basic compatibility principles:

  • Air flow: air filter, reed valve, intake manifold, carburetor, cylinder and exhaust form a chain. Any bottleneck has a negative impact on overall performance.
  • Balanced ROM range: Manual transmission motorcycles require a lot of gear shifting. A carburetor that is too large tends to deliver good performance in the upper RPM range, but leads to power gaps at low revs, with poor pulling power on hills or when accelerating out of bends. The choice must suit the intended use (city, roads, back roads, race track).
  • Carburetor tuning: Every change (cylinder, exhaust, air filter, reed valve) changes the air/fuel ratio. Retuning the jets, needle and air screw is not optional, but necessary to avoid piston seizure and loss of power.

In short: Only a balanced, coherent approach ensures that all components harmonize and the engine works correctly over the entire RPM range.

Carburetor adjustment and maintenance

A poorly adjusted high-end carburetor can perform worse than a correctly adjusted standard carburetor. On 50 cc geared motorcycles with high-revving engines and frequent shifting, correct adjustment is crucial to prevent piston seizure and utilize all available power.

the correct carburetor settings

An incorrect mixture has a direct impact on performance and reliability:

  • Mixture too rich (too much fuel): Higher consumption, bluish or whitish smoke, black and wet spark plug, loss of power at high RPMs, exhaust dripping oil.
  • Mixture too lean (too little fuel): Overheating, knocking/detonation, white or "glazed" spark plug, high risk of piston sticking, loss of power.

You check the final tuning using several indicators: spark plug color (ideally tan), engine behavior at all RPMs, fuel consumption, temperature and throttle response.

Setting the carburetor correctly - step by step

Proper tuning is crucial to achieve maximum performance without risking engine damage. Always work top-down: High RPM first, then mid RPM and finally low RPM.

  • STEP 1 → Main jet (high RPM): First install a main jet that is clearly too large, so that the engine runs too rich and starts to stutter as if you were riding with the choke pulled. Gradually select smaller main jets until the engine runs smoothly. Take a test ride after each change. If the engine drops RPM under quick throttle, the mixture is too lean. If the setting is approximately correct, drive a few hundred meters at full throttle and then switch off the engine immediately. Then check the spark plug: If it is black, the mixture is still too rich and you need a smaller jet; if it is white, the mixture is too lean and there is a risk of piston seizure; a light brown / tan color is optimal.
  • STEP 2 → Needle (mid RPM): Ride at half throttle and listen for the engine: If the engine stutters or runs erratically, the mixture is too rich and the needle is set one notch lower; if it stalls or loses power, the mixture is too lean and the needle is set higher. If the engine runs smoothly and consistently in the mid-range, the setting is correct.
  • STEP 3 → Adjust the air mixture screw (lower RPM): From idle, open throttle sharply: If response is delayed or uneven, turn the screw 1/4 turn. Note: Open screw = leaner, closing screw = richer. Adjust gradually until the engine responds immediately and cleanly.

Signs of correct tuning: The engine runs smoothly and constantly in all speed ranges, without jerking or misfiring, and the spark plug is light brown after a full throttle run.

Pro tip: Always have a set of spare main jets with you (±2-3 sizes). Temperature, altitude and humidity influence carb performance. On cold days, a richer mixture may be necessary; in hot weather or at high altitudes, a leaner mixture may be better.

Carburetor maintenance

A carburetor only delivers optimum performance if it is correctly maintained.

  1. Regular cleaning: Remove the float chamber, clean the jets with compressed air or carburetor cleaner and check the float and needle valve. Dirt in the jets distorts the metering.
  2. Clean air filter: A clogged filter reduces the air flow and makes the mixture richer. Depending on use, you should clean or replace it more frequently in dusty environments.
  3. Correct fuel level: Check whether the float maintains the correct chamber level. If the level is too low, the mixture is lean and can cause engine damage.
  4. Check seals and hoses: Leaks (gaskets, cracked hoses) can lean the mixture. Check and replace seals and hoses regularly.
  5. Condition of slide and needle: Wear on these parts changes the tuning in the mid-range. If there is play or significant wear, you should replace the parts.

After long downtimes, old fuel remaining in the system can block the channels. There are two cleaning methods:

  1. With cleaning additive in the fuel, which dissolves deposits without having to remove the carburetor.
  2. Complete disassembly, recommended if the additive is not sufficient. The parts are cleaned with special agents and a fine brush, and their condition is checked at the same time.

Note: Modern fuels (with ethanol and additives) age quickly and are not ideal if a 2-stroke engine is not used for a longer period of time. If your moped is not used for several months, fuel quality deteriorates, the fuel becomes viscous and can block channels and jets in the carburetor, resulting in starting problems and poor engine operation. In older engines, these fuels can also attack seals and rubber parts. To avoid breakdowns and a complete carburetor removal, you should not leave your vehicle with fuel in the system for long periods of time. Regular use or at least occasional starting of the engine is ideal.

How often should you clean the carburetor? In normal use, every 6 to 12 months. In a very dusty environment or after a long downtime, you should check and clean earlier.

overview: Flange types, connection widths and diameters

When changing the carburetor, in addition to the diameter, it is important that the carburetor connection fits correctly into the intake manifold to avoid functional problems. Most important assembly types:

✅ Rubber flange (flexible)

This is the most common connection type for 50cc motorcycles, especially for sports and racing carburetors. The rubber intake manifold dampens vibrations and ensures reliable installation.

DiameterCarburetor
24-25 mmDell'Orto PHVA/PHBN/PHBG 12-21 mm, Polini CP 17.5-21 mm (Ø25.5 mm), Arreche 16-21 mm
31 mmMikuni TM 24 mm, Dell'Orto PHBL 20-26 mm
35-36 mmKeihin PWK 19-30 mm (Ø35 mm), Dell'Orto VHST 24-28 mm (Ø36 mm), Dell'Orto VHSH 30 mm (Ø36 mm), Dell'Orto PHBH 26-30 mm (Ø35 mm)
40 mmKeihin PWK 30-36 mm, Mikuni TM(X) 32-35 mm

Note: The connection diameter is measured on the carburetor. Rubber sleeves are usually slightly smaller as they expand during installation.

✅ Clamp flange (rigid)

Rigid connection with metal clamp, typical for some Dell'Orto PHBG and Polini CP.

DiameterCarburetor
17-21 mmDell'Orto SHA 14-16 mm, Bing
24 mmDell'Orto PHBG 15-21 mm, Polini CP 15-21 mm, Arreche 16-21 mm

✅ Screw flange

Some original carburetors, especially on older models, are attached directly to the intake manifold with screws. In this case, the important dimension is the center-to-center distance of the mounting holes.

Hole-to-hole distanceCarburetor
48 mm2T: Yamaha DT, Honda MB, MT, MX, MTX, Simson / 4T: Pitbike, ATV, Honda Dax & Monkey

Mounting tips

  • Identify flange type: Rubber flange, metal clamp, srew-on
  • Measure the inside diameter of the intake manifold / flange and the connection width of the carburetor
  • Select a suitable model
  • After installation, check that there is no air leaks: Run the engine and spray some brake cleaner on the connections. if the idling speed changes, there is a leak.

Our catalog: Carburetors and spare parts

In this online store you will find a complete range of carburetors, spare parts and accessories for supermoto and enduro bikes of all brands: from OEM parts for regular maintenance to racing components for extreme performance setups - everything you need to ensure that the engine delivers maximum performance.

✅ Carburetors from top brands

We work with recognized manufacturers - guaranteeing quality, performance and durability.

  • Stage6 R/T Racing/Tuning: designed for competition and high performance, with advanced technologies and lightweight materials.
  • Dell'Orto: PHBG, PHBN, PHVA, VHST, PHBL. Italian reference for all applications.
  • Polini: CP and PWK series (24-30 mm), robust and suitable for sports and racing setups.
  • Mikuni and Keihin: Japanese high-end technology for demanding 2-stroke engines.
  • Motoforce Racing: Very good value for money.
  • Other brands: Malossi, Gurtner, Voca Racing; each with specific applications and proven performance.

⚡ We also offer complete carburetor kits with carburetor, intake manifold and matching reed valve to simplify the selection of suitable parts.

✅ Spare parts and individual components

All spare parts are available individually or as kits to keep the carburetor in perfect condition:

Thanks to the detailed exploded views, you can quickly find the right spare parts for any model.

✅ Tools and maintenance

Why buy from us?

Choosing the right carburetor makes the difference between a machine that simply "runs" and one that accelerates optimally, responds immediately and is a real pleasure to ride. Whether standard or tuned: the interaction of carburetor, cylinder, exhaust and intake is the key.

This store offers:

  • Permanently available stock of the most popular brands
  • Fast shipping
  • Technical advice for easier selection
  • Quality guarantee on all products
  • Fair prices

Discover our catalog and take your 50cc motorbike to the next level.

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