Motorcycle carburetor modification kit for performance upgrade with PWK sandblasted aluminium bodies available in 21mm, 24mm, 26mm, 28mm, 30mm, 32mm, and 34mm bore sizes to match engine displacement from 50cc to 350cc including KR150 KSR models
PWK Sandblasted Motorcycle Carburetor Modification Kit in Seven Bore Sizes from 21mm to 34mm

This motorcycle carburetor kit offers a practical solution for riders and mechanics looking to modify their bike's performance through carburetor replacement or upgrade. The kit centres on the PWK carburetor design, finished with a sandblasted aluminium body, and is made available in seven distinct bore sizes to match a wide range of engine displacements. By providing specific sizing from 21mm up to 34mm, the product allows for precise selection based on engine capacity, which can influence air and fuel flow rates. It is listed as compatible with KR150 KSR models and described as having universal fitment for carburetor motorcycles, making it a relevant option for various modification projects aimed at increasing exhaust volume and enhancing performance.
Features and Construction

The core of this modification kit is the supplied carburetor unit, built for direct installation. Its construction and available specifications are clearly defined, allowing for an informed selection based on your motorcycle's requirements.
Material and Build
The carburetor features an aluminium alloy body that has undergone a sandblasting process. This sandblasted finish provides a consistent textured surface. The design follows the PWK carburetor pattern, a recognised style in performance tuning. The product is supplied as a complete, ready-to-fit unit, negating the need for additional core components for a basic swap. With a total weight of 0.55kg, it offers a tangible replacement part for the motorcycle's fuel delivery system.
Size and Practical Fit
The kit's primary differentiator is the availability of seven precise bore sizes: 21mm, 24mm, 26mm, 28mm, 30mm, 32mm, and 34mm. This range covers engines from small 50cc capacities up to larger 350cc units. The source provides specific engine displacement guidelines for each size, such as 21mm for 50cc-100cc engines and 34mm for 250cc-350cc engines. This detailed guidance aids in selecting the correct carburetor to match your bike's engine, which is a fundamental step in performance modification. The product is noted to be compatible with KR150 KSR models and is also described as universal for carburetor motorcycles, suggesting broad application potential.
Uses and Placement

This carburetor kit is designed for specific modification scenarios, from professional workshop use to enthusiast-led home projects. Understanding its intended application helps confirm it meets your mechanical needs.
Event or Professional Use
For professional mechanics or tuners working in a workshop setting, this kit provides a range of replacement carburetors for customer bikes undergoing performance upgrades. The availability of multiple sizes in one product line can simplify inventory. The clear engine capacity matching data allows for quick, informed part selection when working on various motorcycle models, from smaller commuter bikes to larger performance machines, particularly where increased exhaust volume and airflow are desired outcomes of the modification.
Everyday Home Use
For the motorcycle enthusiast undertaking modifications at home, this carburetor serves as a key component in a performance upgrade project. The product information allows a home mechanic to cross-reference their bike's engine cc against the provided size chart to choose the appropriate 21mm, 24mm, 26mm, 28mm, 30mm, 32mm, or 34mm unit. The sandblasted finish and complete unit supply mean the part arrives ready for the installation process as part of a broader modification plan to alter the motorcycle's performance characteristics.
Benefits and Buying Value

The value of this modification kit lies in its specification clarity and practical application for tuning. It addresses specific mechanical needs without unnecessary complexity.
Reuse and Low Maintenance
As a complete replacement carburetor, this product is intended for long-term use once installed. The aluminium construction is a standard material for such components. While specific long-term maintenance schedules are not detailed in the source, the product's design as a replacement part implies it fulfils the ongoing role of the motorcycle's carburetor within the fuel system following installation, forming part of the bike's standard maintenance routine.
Why Choose This Product
This carburetor kit stands out due to its precise sizing options and clear application data. The availability of seven distinct bore sizes, each with stated engine capacity ranges, removes guesswork from the selection process for a performance-critical component. The inclusion of compatibility with KR150 KSR models and the universal claim offers flexibility. For anyone seeking a carburetor for modification purposes with the goal of impacting performance and exhaust volume, this kit provides a defined, specification-led option from 21mm to 34mm.





