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22.58 USD (3,600 JPY)
Delivery Information
If manufacturer have in stock, ships around 30th Jun. 2026
Quantity: For 1 carburetor (1 cylinder)
【Set Contents】
Needle valve
Idle screw (Air screw)
Float chamber gasket
Pilot jet: 3 sizes
Main jet: 6 sizes
Jet needle: 4 sizes
etc.
** Set contents vary by product. Please refer to the product image.
* Specifications are subject to change by the manufacturer without notice..
Here's a list of motorcycle good mood diagnostics to help you troubleshoot (manufacturer's website).
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Keyster carburetor fuel tuning kits contain almost all parts required for carburetor repair and adjustment. This includes needle valves, idle screws (air screws), float chamber gaskets, and more. A key feature is the extensive selection of fuel tuning components: 3 sizes of pilot jets, 6 sizes of main jets, and 4 sizes of jet needles.
The rubber-tipped needle valve utilizes the award-winning "AA Needle," which offers performance far exceeding that of OEM parts.
Conventional aftermarket jet sets typically feature evenly spaced sizes (e.g., increments of 5 or 10). However, the jets in this kit are not evenly spaced. They are designed in sizes that allow for effective and precise air-fuel ratio adjustments when combined with the jet needles.
The first purpose of this kit is troubleshooting (improving performance issues) for motorcycles with fuel supply problems.
Generally, to increase the air-fuel ratio, the pilot jet, jet needle, and main jet should all be adjusted in the L direction; conversely, to decrease the ratio, they should be moved in the R direction. However, the combination of L, S, and R settings varies depending on which range (low, mid, or high speed) you wish to adjust. This is the essence of carburetor tuning.
The second purpose is motorcycle tune-up (performance enhancement).
Note that a carburetor does not generate power on its own, so adjusting the carburetor alone will yield limited results. Performance improvements are realized by adjusting the carburetor to match engine modifications or changes to intake/exhaust components. For example, if you install a high-flow air filter or a low-resistance exhaust, the engine's air-fuel mixture requirements will change. This kit facilitates the necessary carburetor adjustments to meet those new requirements.
Points of Attention
* If there may be an instruction manual included, it will be written in Japanese.
Reviews with image
Fits:KAWASAKI 90SS 90SS 90-GA3
Jan 19, 2016
Despite the former for Vehicle, a wide range of settings can be made! Every time I am in the carburetor's OH, I always use it. I think that it would be better to have a newer car kit.
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