Mikuni Carburetors

Ricardo Patel
10 min readJun 19, 2024

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Get ready to explore the world of Mikuni carburetors, as we take a deep dive into the features and benefits of these popular aftermarket parts. From enhanced fuel efficiency to improved performance, Mikuni carburetors offer a range of advantages for enthusiastic drivers seeking to optimize their vehicle’s capabilities.

The Top 8 Best Mikuni Carburetors

  1. Mikuni OEM Carburetor for Yamaha Big Bear 400 — Genuine Factory Replacement — Get the genuine Mikuni OEM Carburetor for Yamaha Big Bear 400 07–12 BSR33-P74 by Niche Cycle, a made-in-Japan replacement part with exceptional performance and durability.
  2. Niche Cycle Mikuni OEM Carburetor for Yamaha Big Bear 400 (03–06) BSR33-P48 — Experience unparalleled performance and craftsmanship with the Genuine Mikuni OEM Carburetor for Yamaha Big Bear 400 03–06 BSR33-P48 by Niche Cycle, guaranteed to fit your 4x4 or 2x4 vehicle from 2003 to 2006.
  3. Mikuni Carburetor Performance Kit for Small Block Engines — Transform your engine’s performance with the genuine Mikuni VM22 Carburetor Kit, offering easy installation, incredible throttle response, and thorough in-house jetting for optimal tuning.
  4. Mikuni 24mm Flatslide Carburetor Kit by GoPowerSports — Unleash impressive power and smooth operation with the 24mm Flatslide Mikuni Carburetor Kit, perfect for 6.5hp clones, Hondas, and predator engines.
  5. Genuine Mikuni 22mm Carburetor for VM22–133 Engine — Experience smooth performance and genuine quality with the 22mm Mikuni Carburetor, a reliable choice for stock to mild 212cc engines.
  6. Upgrade Your Honda FT500 with Mikuni VM34 Carburetor Kit — Elevate your Honda FT500’s performance with the Mikuni VM34 Carburetor Kit for a thrilling and efficient ride.
  7. Polaris Sportsman 700 Mikuni OEM Carburetor 1203060 by Niche Cycle — Experience optimal performance with the Niche Cycle OEM Mikuni Carburetor, designed specifically for the 2005–2006 Polaris Sportsman 700.
  8. CB100 Honda Mikuni Carburetor Replacement Kit for 1971 and Up Hondas — Upgrade your Honda CB100 with the VM24 Mikuni Kit for increased performance and superior reliability.

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Reviews

Mikuni OEM Carburetor for Yamaha Big Bear 400 — Genuine Factory Replacement

I recently installed the Mikuni OEM carburetor for my Yamaha Big Bear 400 ATV, and I must say, it’s been a game-changer. As a fellow ATV enthusiast, I’ve dealt with less-than-stellar aftermarket parts, but this Mikuni carburetor has been a breath of fresh air. The factory replacement part fit perfectly, making the installation a breeze.

One of the first things I noticed was the smooth idle of my ATV. The stock carburetor I was using before struggled to adjust idling, but the Mikuni handled it with ease. Additionally, the throttle response was significantly improved, giving the ATV a more responsive and enjoyable ride.

The durability of the Mikuni carburetor is also noteworthy. After a couple of months of off-road rides, it still runs as smooth as the day I installed it. It’s clear that this is a high-quality item, which is evident by its “Made in Japan” label and the fact that it’s an OEM part.

However, I would be remiss if I didn’t mention that the choke mechanism was slightly different from what I was used to, which I found to be a minor issue. Nevertheless, this didn’t affect the overall performance of the carburetor, and I believe it’s a small price to pay for such a reliable and well-crafted product.

In conclusion, the Mikuni OEM carburetor for the Yamaha Big Bear 400 is a top-notch part that delivers smooth performance and durability. While there may be some minor inconveniences, they are far outweighed by the exceptional performance and reliability of this product. Highly recommended for all ATV enthusiasts!

Niche Cycle Mikuni OEM Carburetor for Yamaha Big Bear 400 (03–06) BSR33-P48

The Mikuni OEM Carburetor by Niche Cycle is a high-quality, authentic Japanese-made replacement part. Designed for Yamaha Big Bear 400 models from 2003 to 2006, this carburetor fits both 4x4 and 2x4 editions perfectly.

Users consistently report that it performs well, leading to a smooth and satisfying experience for ATV enthusiasts. Priced competitively, this OEM carb is a standout choice for those seeking genuine, reliable products.

Mikuni Carburetor Performance Kit for Small Block Engines

If you’re looking to enhance your small block engine’s performance, consider giving this Mikuni carburetor kit a try. It’s a genuine Japanese product designed for seamless installation and fine-tuning. One of the key features of this kit is its amazing throttle response, which makes it a top choice for enthusiasts.

However, there are a few things to keep in mind. First, be prepared to remove your governor to make room for this carburetor. Second, since these carbs are jetted in-house, there might be some fine-tuning required to get optimal performance. Although it’s a minor inconvenience, the overall experience is well worth it for the improved performance. So if you’re ready to take your engine to the next level, this Mikuni carb kit could be just the thing you’re looking for.

Mikuni 24mm Flatslide Carburetor Kit by GoPowerSports

The GoPowerSports Performance 24mm Flatslide Mikuni Carburetor Kit is a remarkable addition to your engine. This kit is designed specifically for 6.5hp clones, Hondas, and predator engines, offering impressive power and versatility.

With its ability to work seamlessly with a range of modifications and highly modified engines, this carburetor kit makes it easy to tune and optimize your engine performance. Additionally, it can be used with various types of fuel, including pump gas, non-ethanol, and high octane fuel. A great upgrade for enhancing your engine’s performance.

Genuine Mikuni 22mm Carburetor for VM22–133 Engine

The Mikuni VM22–133 Carburetor offers a significant upgrade for 212 cc engines, with recommended jetting that ranges from 130 main jet to 140 main jet sizes. Offering a 2.0 throttle valve and 2.5 main air jet, this carburetor delivers precise power for an enhanced engine performance.

The spigot mount ID is 22mm, making it compatible with stock to mild engines, but this may require modifications for a better fit. Users have reported varying degrees of difficulty during installation, with some citing the placement of the choke as problematic.

The carburetor has proven to perform exceptionally well after the initial installation, showing increased power and a noticeable difference in overall engine performance. However, it’s crucial to note that some users have experienced issues with the fit of the carburetor, especially when it comes to intake tubes and spacers.

Despite some minor drawbacks, users overall seem satisfied with their purchase, stating that the Mikuni VM22–133 Carburetor offers great value for the price. The high-quality craftsmanship adds to its appeal, making it a solid choice for those looking to boost the power of their 212 cc engine.

Upgrade Your Honda FT500 with Mikuni VM34 Carburetor Kit

The Mikuni VM34 carburetor kit for the Honda FT500 is a game-changer for those seeking to improve their bike’s performance. Installing this kit was a breeze, and I was surprised at how quickly my bike came alive.

The midrange power is exceptional, providing a smoother and more responsive riding experience. However, I did notice slightly reduced fuel economy compared to my original carburetor. Overall, I’d recommend this kit to anyone looking to enhance their Honda FT500’s performance, but be prepared for a slight trade-off in fuel efficiency.

Polaris Sportsman 700 Mikuni OEM Carburetor 1203060 by Niche Cycle

Experience seamless performance with the Mikuni OEM carburetor designed specifically for the Polaris Sportsman 700 model from 2005 to 2006. This high-quality carburetor is brought to you by Niche Cycle, a trusted provider of authentic parts. The Mikuni carburetor boasts a reliable fuel delivery system that helps optimize engine power and ensures a smooth riding experience.

However, while it is an excellent choice for those looking for a genuine OEM replacement, it may not be the most budget-friendly option on the market. Overall, the Mikuni carburetor for the Polaris Sportsman 700 provides top-notch performance to enhance your off-road adventures.

CB100 Honda Mikuni Carburetor Replacement Kit for 1971 and Up Hondas

As a vintage motorcycle enthusiast, I recently had the chance to upgrade my Honda CB100 with the VM24 Mikuni Carburetor Replacement Kit. The installation process was seamless, and the new carburetor immediately breathed new life into the old bike. The aluminum manifold and pod filter provided a sleek look while the fuel filter ensured a cleaner, more efficient burn.

The throttle cable was responsive, giving me smooth acceleration as I cruised down the open road. However, I did notice a slight drop in mileage after the installation.

Overall, the VM24 Mikuni Carburetor Replacement Kit improved my CB100’s performance, but it might be worth considering for those looking for higher fuel efficiency.

Buyer’s Guide

Mikuni carburetors are a popular choice for enthusiasts seeking optimal performance and fuel efficiency for their motorcycles. This buyer’s guide section will provide you with valuable information on the essential features, considerations, and general advice when purchasing a Mikuni carburetor for your bike. Remember, this guide does not endorse any specific product picks or external resources.

Choose the right Mikuni carburetor for your motorcycle

There are different Mikuni carburetor models available, and it’s crucial to select the correct one for your motorcycle. Factors to consider include: the engine’s size, the type of bike (sport, touring, cruiser, etc. ), and your desired riding style (e. g. , aggressive or fuel-efficient). Make sure to consult your bike’s manual or an experienced mechanic to ensure proper compatibility.

Consider the carburetor’s specific features

When shopping for a Mikuni carburetor, consider its features that can impact performance and maintenance. Key features include: the number of jets and needles, butterfly diameter, jet size, and the presence of a choke. Additionally, some models offer adjustable main jets, allowing for fine-tuning to achieve the ideal air-fuel mixture.

Look for durable materials and quality construction

A well-built Mikuni carburetor will provide optimal performance and longevity. Pay attention to the materials used in its construction, such as stainless steel and brass, as they can withstand wear and tear over time. Additionally, check for quality craftsmanship, precise tolerances, and smooth operation to ensure a reliable and long-lasting product.

Consider installation and tuning

Installing a Mikuni carburetor may require some tuning to achieve the desired performance. Factors to consider include: air filter, main jet size, and needle positioning. If you are unsure about the installation or tuning process, consult a professional mechanic or experienced enthusiast to avoid potential problems.

FAQ

What is a Mikuni Carburetor?

A Mikuni Carburetor is a type of fuel delivery system designed for internal combustion engines, specifically motorcycles and go-karts. The carburetor mixes air and fuel to create the ideal air-to-fuel ratio necessary for combustion, providing optimal engine performance and fuel efficiency. Mikuni Carburetors are known for their reliability, ease of use, and flexible tuning capabilities.

Mikuni Carburetors have been in production since the 1960s and have gained a reputation for their high-quality products in various motorsports and racing events worldwide. The company offers a wide range of carburetors designed for different motorcycle models and applications, making them a popular choice among enthusiasts, racers, and mechanics.

What are the advantages of using a Mikuni Carburetor?

There are several advantages to using a Mikuni Carburetor. First, they are known for their reliability and durability, providing consistent performance even under extreme conditions. Second, Mikuni Carburetors offer a wide range of tuning options, allowing users to customize the air-to-fuel ratio to optimize engine performance and fuel efficiency. Third, Mikuni Carburetors tend to be lighter and more compact than similar fuel injection systems, which can improve overall vehicle performance and handling. Finally, Mikuni Carburetors are often more affordable than their fuel injection counterparts, making them a budget-friendly option for many motorcyclists.

Lastly, Mikuni Carburetors are widely available, with both OEM (original equipment manufacturer) and aftermarket options, ensuring that there are plenty of parts and support resources for owners who need them. Overall, the advantages of using a Mikuni Carburetor include enhanced performance, flexible tuning options, and cost-effectiveness compared to other fuel delivery systems.

What types of Mikuni Carburetors are available?

Mikuni offers a diverse range of carburetors designed for various motorcycles and applications. Some of the popular types of Mikuni Carburetors include the VM (Velocity Metering), SVM (Spring Venturi Mixing), and CV (Constant Venturi) series. Each series caters to different motorcycle models and has specific tuning options to optimize engine performance.

The VM series is popular for high-performance applications and racing events, as it uses a digital adjustment system for precise fuel delivery. The SVM series is designed for touring and commuter motorcycles, providing a smoother and more predictable fuel delivery. Lastly, the CV series offers a balance of performance and fuel efficiency, making it a popular choice among street riders and racers.

How can I tell if a Mikuni Carburetor is the right choice for my motorcycle?

To determine whether a Mikuni Carburetor is the best option for your motorcycle, consider factors such as the engine size, horsepower, and desired performance characteristics. Research the specific Mikuni Carburetor series and model that best matches your motorcycle’s needs and consult with a knowledgeable mechanic or dealership to ensure proper installation and tuning. Additionally, read reviews and testimonials from other riders who have used Mikuni Carburetors on similar motorcycles to get an idea of their performance and reliability.

It is also essential to consider the availability of spare parts and service support in your local area. Mikuni has a vast network of dealers and distributors worldwide, making it easier to find parts and support if needed. Make sure to invest time in researching the right Mikuni Carburetor for your motorcycle and seek professional advice to ensure a smooth and successful installation process.

Can I install a Mikuni Carburetor on my motorcycle myself?

While it is possible to install a Mikuni Carburetor on your motorcycle yourself, it is generally recommended to seek professional assistance from a qualified mechanic or dealership. Installing a carburetor can be a delicate and time-consuming process, and there are specific steps and techniques required to ensure proper installation and tuning.

Hiring a professional ensures that your motorcycle’s electrical and mechanical systems are not damaged during installation, and that the carburetor is properly calibrated for optimum performance. Additionally, a professional will be able to provide valuable advice and recommendations based on your motorcycle’s specific needs and requirements.

Do Mikuni Carburetors require any special maintenance or care?

Proper maintenance and care are essential for keeping your Mikuni Carburetor in top working condition. Regularly inspect the carburetor’s components, including air filters, fuel filters, and jets, to ensure they are free from dirt, debris, and contaminants. Clean or replace clogged or worn-out parts as necessary to maintain optimal performance.

It is also crucial to keep the carburetor properly gasketed, ensuring that there are no leaks around the gasket area. Regular inspections and maintenance can help extend the life of your Mikuni Carburetor and ensure consistent performance. Consult your motorcycle’s owner’s manual or a knowledgeable mechanic for specific recommendations and maintenance schedules for your particular Mikuni Carburetor model.

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