FCR

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FCR

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CRS

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P-Series

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CRS

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P-Series

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Why Bito/ Keihin Carburetor

The JB-POWER Special Carburetors, world-renowned for their abundant variety, advanced technology, and extensive know-how that is put into their development and production earned wide support from race and street-users in Japan as well as overseas. Our pre-setting not only considers the model, its displacement but also the venturi diameter of each carburetor so that you can have a first test ride after installing which is a great advantage for the fine-tuning. In addition to Keihin genuine parts, we also offer an extensive lineup of peripheral parts like a huge variety mount adapter, machined aluminum air funnels, throttle holders, throttle wires, wire ends, and more, and will continue to develop and produce carburetors models that our customers need.

Large Lineup

Based on excessive amounts of data and experience we can offer a broad range of carburetor models in numerous venturi sizes for many motorcycle and car applications!

Pre-Setting

The JB-POWER pre-setting considers venturi diameter, engine displacement, number of cylinders, etc. that give a significant advantage for the fine adjustment after installation.

Parts/Accessories

We stock many genuine parts such as jets, o-rings, gaskets, and bolts as week as an extensive lineup of after-sales accessories such as aluminum funnels…

Bito Originals

BITO R & D offers not only the common single, twin, and straight-four but also produces special carburetors that are not made elsewhere. We are regularly creating new carburetor models, like straight-six, straight-three, V-engine, etc., in a continuous research and development process to be a strong supporter of customers that want to enjoy riding their vintage bikes.

CBX1000

The carburetor was developed in a V-Shape so that it can be easily installed by using genuine insulator (manifold) rubbers.
Additionally, by changing from 2x straight-three to a joint connected straight-six configuration, we realized a linear throttle response, easier setting, and installation.

Z1300

The JB-POWER Special Carburetor and Intake Manifold & Insulator Set combination can be used from Z1300 to Z1300G. It will relieve you from the worry that your bike can not be assembled due to the production genuine parts has been ceased.
* The separately sold Intake Manifold & Insulator Set is required for installation.

VFR750R

This carburetor was specially designed and manufactured for the water-cooled, 360° (big bang) crankshaft, 90° v-type engine limited-edition homologation model of Honda’s, said to be invincible, TT F-1 Class V4 Superbike. It’s machined aluminum plates and link-arm construction makes it easy to install and highly accurate and the included insulator (manifold) rubbers are a dedicated product. We also offer a proprietary milled aluminum thermostat cover to ensure sufficient clearance. The kit also comes with installation instructions so that even beginners can easily install it properly.

VFR400R

BITO R&D created this extraordinary V-Type quad carburetor by pouring all its unique technology and know-how into a product.
Thanks to the JB-POWER Special FCR carburetor, the still popular, VFR400R / RVF400’s engine power and response are significantly improved making it an all the more interesting bike. I think that it is a great option for all customers that are having trouble with the discontinued standard carburetor.

 

FCR

A powerful acceleration was achieved by installing an acceleration pump, which also contributes to improved startability.
Customizable Mount adapter [We accept custom offers for models and adapters dimension that are not in our standard lineup.]
The JB sticker proves that this carburetor has been inspected and determined as ready to ship by BITO R&D’s strict proprietary standard JB-SPEC.
In addition to the genuine resin funnels, we manufacture a variety of machined aluminum funnels as well as power filters and normal cleaner box adapters for many models that are usually in stock.

While preserving the advantages of the CR Special, the FCR carburetor has been greatly improved by using bearing rollers at the throttle valves, leading to significantly lighter and more comfortable accelerator operation. Inheriting the traditional CR high-efficiency venturi shape, the dead space in the venturi was eliminated to reduce vortex current losses and enable power-up at especially flow speeds. Additionally, the FCR has a throttle valve, balance valve assembly that ensures high airtightness as well as stable idling and is equipped with a diaphragm type accelerating pump, short venturi tunnel, so that the carburetor can have a larger diameter in response to the high-output engines while already exerting great power when accelerating from low to medium speeds and providing powerful acceleration.

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CRS

The KEIHIN CR-SPECIAL is a racing carburetor designed and manufactured based on a wealth of experience gained through many years of race activities. Not only the increased engine power but also an improved throttle response promise great driving performance. In addition to its stable slow system, the abundant variety of bore sizes and settings parts enables a precise carburetor tuning over the entire usage range according to the application and purpose. Its greatest feature is that all models are equipped with a starter valve, ensuring an easy and reliable engine start. Nearly 40 years have passed since its launch and albeit the advent of the FCR it is still loved by many users due to its unbeatable cost-performance and unique appearance.

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Customizable Mount adapter [We accept custom offers for models and adapters dimension that are not in our standard lineup.]
The JB sticker proves that this carburetor has been inspected and determined as ready to ship by BITO R&D’s strict proprietary standard JB-SPEC.
The throttle response is improved through our established technology, vast knowledge, and high accuracy during the assembly.
The CRS carburetor’s best feature is that all models are equipped with a starter valve, ensuring an easy cold start.
Customizable Mount adapter [We accept custom offers for models and adapters dimension that are not in our standard lineup.]
The JB sticker proves that this carburetor has been inspected and determined as ready to ship by BITO R&D’s strict proprietary standard JB-SPEC.
The JB sticker proves that this carburetor has been inspected and determined as ready to ship by BITO R&D’s strict proprietary standard JB-SPEC.
The CRS carburetor’s best feature is that all models are equipped with a starter valve, ensuring an easy cold start.

The KEIHIN CR-SPECIAL is a racing carburetor designed and manufactured based on a wealth of experience gained through many years of race activities. Not only the increased engine power but also an improved throttle response promise great driving performance. In addition to its stable slow system, the abundant variety of bore sizes and settings parts enables a precise carburetor tuning over the entire usage range according to the application and purpose. Its greatest feature is that all models are equipped with a starter valve, ensuring an easy and reliable engine start. Nearly 40 years have passed since its launch and albeit the advent of the FCR it is still loved by many users due to its unbeatable cost-performance and unique appearance.

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P-Series

PE

A general-purpose carburetor with a round throttle valve than can be used for 4-stroke as well as 2-stroke engines.

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PWK

A general-purpose carburetor with a half-moon shaped throttle valve that was designed to be used with 2-stroke engines.

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PWM

With the latest flat valve and revised cutaway shape, the PWM is an even more 2-stroke dedicated carburetor than the PWK.

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Accessories/ Parts

Besides the carburetor setting components, we offer a wide range of parts such as FCR/CR name stickers and BITO R&D original products. Machined aluminum air funnels, normal cleaner box adapters, power filter adapters, throttle holders, throttle wires, wire ends, bolt & nut assemblies, and more are always in stock, so please contact us anytime.

Machined Air Funnel

A unique taper shape and length derived from many years of research and actual results improve air intake efficiency. The JB-POWER stainless steel net air funnel protects the engine from pebbles and foreign objects while maintaining an excellent intake efficiency.

Cleaner/Power Filter Adapter

At BITO R&D, we developed and produce normal cleaner box adapters and power filter adapters that allow you to continue using the normal cleaner box with an FCR carburetor.

Throttle Holder + Wire

The JB-POWER machined aluminum throttle holder is not only compatible with FCR and CRS due to its unique opening angle, construction, and design, but we would like to particularly note its throttle lightness and precision. An accurate and strain-free throttle operation is a great benefit when going on extended trips. Additionally, our throttle wire lineup includes straight, Y-type as well as Ducati and Harley-Davidson exclusive wires.

Spare/Peripheral Parts

Although the FCR carburetor has almost no constructional problems, however, due to deterioration and usage conditions overflow and clogging may occur over time. We recommend replacing consumable parts regularly to prevent problems. When using the KEIHIN carburetor, be sure to use genuine parts to obtain 100% performance.
BITO R&D always stocks various jets and repair parts.