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Carburetor 29mm Smooth Bore CR Special Honda CB750 SOHC 1969-1976 & 1977-1978 CB750k CB750F


Custom CR29mm Smoothbores, up to 10% Increase in Bolt on power for your inline Four HONDA.


KEIHIN CR Carburetor is designed based on the rich experience gained through years of Race activities , It is a manufactured high performance Racing carburetor.
Engine promises a great run by improving Throttle response as well as Power up.


I fitted a set of these to Mike Dirnt’s Bike of the Band Greenday, this bike seriously Hauled arse once fitted and tuned, these can be such a help for these inline fours.

mikes bike

In addition, it has stable Throw system, with abundant Bore size and Setting parts,  You can fine-tune Carburetor setting over the entire range of use according to your purpose.
Starting system can be started easily and reliably with Starter lever system. At the same time, it has high durability and performance stability by a smooth ThrottleLINK using a non-lubricated Ball bearing and a strong connection method.


Since its launch, CR Carburetor Carburetor, which has been loved by many users for a long period of 20 years, has been supported since the CCR performance of FCR Carburetor Body Carburetor has appeared, as well as its high performance.

* The image is only for reference. The image shown may differ from the actual product.


OK-here is some more information you may need as the ones listed are for the CR29 mm Part Number 0163025 that covers Honda SOHC models 1969-1976, the CB750 SOHC 1977-1978 is a different parts number which is 0163027 but both retail at $1193 out the door.


carbs explosion

What do these offer you I hear you ask?

carbs info

CRS Features:

– Smooth bore design for maximum air flow.

– Designed for use specifically on sidedraft four-stroke motorcycle engines.

– Smooth venturi design produces stronger power than original equipment carburetors on 1978 and earlier models using butterfly throttle valves.

– Improved throttle response and precise control on 1979 and newer engines
using vacuum slide carburetors as original equipment with the CR-Special direct linkage to slides design.

– Easy installations with kits available for single, twin, and four cylinder motorcycles.

– Easy jetting which can be done at track side or in your garage!

– Sold with racing velocity stacks but can be used with DP air filters for maximum engine protection.

Keihin carburetors have long been considered some of the finest carburetors in the world. Used by top race teams around the world, the CR series is the result of decades of roadracing experience and technology improvement. The CR carburetors have proven to be some of the most reliable and powerful carburetors available, they include the following features:

These Keihin CR Special Quad carburetor kits come complete with mounting spigots, and velocity stacks. Also, they can just bolt up to your stock filter system.

Carbs come Pre-Jetted to the following specs.

120 Main

60 Pilot

YY8-4 Needle

240 Main Air Jet


These are so much easier to fit on your inline four, plus if tuned right, you can increase the HP by as much as 10%, and ya gotta love that right.


Bolt these puppies on and GO!!!!!!!!!!!!!!!!!!

I have been selling these for over 17 years and love them.




Weight 12 lbs
Dimensions 15 × 12 × 12 in


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