The Best 40Mm Carburetor of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best 40Mm Carburetor of 2025. Check our ranking below.
2,633 (random) Reviews Scanned
- Compatible With: This PWK 40mm carburetor fit for 400cc to 500cc Off Road scooter dirt pit bike motocross ATV quad.
- Strong Power & Feature: Chromed semi-flat (D) throttle valve for excellent response and more flow at high RPM. Throttle bores sized to give maximum power. Chrome-plated D-shape slider in solid design; Direct response from idle speed; Flow-optimized in high rpm ranges; Easy tuning behavior.
- High Quality: Made of aluminum alloy and its appearance is anodized to improve its wear resistance, corrosion resistance, insulation and heat resistance.
- Easy Install: Direct Replacement For A Proper Fit And Easy Installation; Usually Used At Beyond 150cc ( 250 300 350 400 .... cc).
- Package Including: 1* Carburetor + 1*Air Filter + 1*Intake Manifold Boot + Idle Speed Adjustment Screw + 2*Main Jets + 2*Slow Pilot Idle Jet
- Compatible With: This PWK 40mm carburetor fit for 400cc to 500cc Off Road scooter dirt pit bike motocross ATV quad.
- Strong Power: Chromed semi-flat (D) throttle valve for excellent response and more flow at high RPM. Throttle bores sized to give maximum power.
- High Quality: Made of aluminum alloy and its appearance is anodized to improve its wear resistance, corrosion resistance, insulation and heat resistance.
- Features: Chrome-plated D-shape slider in solid design; Direct response from idle speed; Flow-optimized in high rpm ranges; Easy tuning behavior.
- Easy Install: Direct Replacement For A Proper Fit And Easy Installation; Usually Used At Beyond 150cc Engine ( 250 300 350 400 .... cc).
- Carburettor Bore: 40mm. Please Browse The Pictures For Details.
- FUNCTION: Replacement Of Old Carburettor, Presenting You With Good Atomising Ability
- GOOD ATOMISATION: Precision Construction That Mixes The Gas And Fuel Precisely To Provide The Right Proportion Of Mixture.
- MATERIAL: Made Of Zinc-Aluminium Alloy With Good Mechanical Properties And Corrosion Resistance
- PACKAGE INCLUDES: 1 Piece Motorcycle Carburetor. Installation Instruction Not Included
- ★High Performance:This Precision Manufacturing PWK Series Carburetor is our core product,the shape of the plunger is half moon, it has accurate atomization, extremely smooth power, sensitive throttle response and stable use.PWK carburetors are 5-10% more powerful than PE carburetors.
- ★Fit for:The manifold intake size of PWK40mm carburetor is OD:46mm, ID: 40mm. air filter side outer diameter is 63mm, it fits most 500cc-600cc Atv Dirt Pit Bike GY6 Motorcycle,but for some motor vehicle you may need a Manifold interface.If you are not sure about it, please contact us, we will recommend the right motorcycle parts to match you bike.
- ★Exquisite appearance：Anodized Painted surface makes the carburetor more solid and durable, looks more exquisite. Ensure No cracking and oxidation during use.
- ★Package including:PWK 40mm carburetor *1, #130/#132/#138 main jet*3、#35 slow jet*1 , Carburetor installation manual*1.
- ★100% Warranty:We are always available to help our customers.Please let us know if you are not satisfied with the order.
- [FITMENT]: For Honda ATC250R, CR250, CR500R (1984-2001), TRX250R.
- [FITMENT]: For Suzuki Quadzilla Quadracer 500 LT500R (1987-1990).
- [FITMENT]: For Kawasaki, for Yamaha YZ250 YFZ350, PWK 40mm carburetor universal for ATV Quad Dirt Bike Pit Bike Go Kart engines.
- [INSTALLATION]: Complete & preset, bolt it on directly with no modification and it starts right up.
- [PACKAGE]: 1× PWK 40mm carburetor (main jet 160/pilot jet 55), 1× fuel filter, extra jets #45 55 165 175
- [Improved Responsiveness]NIBBI PWK carburetor features advanced technology to provide faster responsiveness, allowing off-road racers to better control their motorcycles.
- [Increased Flow Rate] NIBBI PWK carburetor has a larger flow rate, enabling the engine to generate more power, achieve higher speeds, and better climbing ability.
- [Better Durability] Made of high-hardness aluminum alloy and treated with anodizing and coating on the surface, NIBBI PWK carburetor has excellent wear, corrosion, insulation, and heat resistance, making it suitable for extreme environments.
- [Automatic Mixture Ratio Adjustment] With a horn intake design that enhances airflow and stabilizes atomization, NIBBI PWK carburetor can automatically match the most reasonable air-to-gasoline concentration ratio based on the engine's different working intensities, outputting the corresponding mixture to match the optimal engine power.
- [Easy Installation] NIBBI PWK carburetor comes with three main jets and one pilot jet, and professional engineers provide installation guidance, making the installation process easier. This allows off-road racers to quickly upgrade their motorcycle carburetor without wasting too much time and achieve better performance in races.
- FITMENT✪-- For Harley Davidson (1998-2016) Sportster, (1988-2017) Softail, (1988-2016) Touring Dyna FXR.
- FITMENT✪-- For Harley Davidson (1988-2006) Sportster 883 1200 XL883 XLH1200 Custom CV 40mm carburetor.
- INSTALL✪-- Main jet #170/pilot jet #45, bolt this preset carburetor on directly and it starts right up.
- PACKAGE✪-- Carburetor + fuel filter + 1 spark plug + hoses + 3 extra main jets (#180 185 190) + 3 extra pilot jets (#42 45 48)
- Outlet inner diam. 40mm, please compare the appearance/model/year/sizes and tell us about any problem.
- Fits: Universal For motorcycle scooter UTV ATV ( Dirt Bike, Quad, ATV TRX250R CR250 ATC250R LT250 LT500 YFZ350 YFZ 350 YZ250 YFM350 YFM450 YZ KX RM CR LT 125 250 500 380....)
- Inner Diameter: 40mm/1.6inch
- Usually Used At Beyond 150cc Engine ( 250 300 350 400 .... cc)
- Direct Replacement For A Proper Fit and Easy Installation
- 40mm CV carburetor is replacement for Big Twin Evolution, replacement for Twin Cam, replacement for Sportster models
- The stock main jet is 185 and the stock slow jet is 42
- Replacement Part Numbers: Replacement for 27421-99C, 27490-04, 27465-04
- This carburetor has a strong structure and is not easy to break and not easy to deform
- With reasonable structure, easy installation, convenient operation and maintenance, reliable performance
- Replacement for - for CV40 Road King Super Glide 1200 XLH1200 Sportster 883 XL883 Softail 1988-2017 Dyna FXR FXD 1988-2016 Touring 1988-2016 Sportster 1998-2016
- Part Number - 27421-99C 27421-99A 27490-04 27465-04
- Material - Made of better materials, with long service life, and no deformation
- Good Reliability - The carburetor has simple structure, low failure rate and good reliability during use
- Package Includes - 1x Carburetor(parts as shown)
Last update on 2026-03-02 / Affiliate links / Images from Amazon Product Advertising API
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- Specifications: How powerful they are can be measured.
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- Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 40Mm Carburetor.
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