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- Instock
30.11 USD (4,800 JPY)
Webike Point: +48 pt
(0.3 USD)
Delivery Information
In Stock : 4 left, Ships within 24 hours.
Estimated arrival date around
Product detail
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 range of fuel tuning components: 3 sizes of pilot jets, 6 sizes of main jets, and 4 sizes of jet needles.
The rubber-tipped needle valves utilize the patented "AA Needle," which offers performance far exceeding 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 to allow for effective and precise air-fuel ratio adjustments when used in combination with the jet needles.
The primary use of this kit is troubleshooting to resolve fuel supply issues.
Generally, to increase the air-fuel ratio, all three components (pilot jet, jet needle, and main jet) should be adjusted in the L direction; conversely, to decrease the ratio, they should be moved in the R direction. However, the specific combination of L, S, and R depends on which range (low, mid, or high speed) requires adjustment, which is the essence of carburetor tuning.
The secondary use of this kit is performance tuning.
Since a carburetor does not generate power on its own, adjusting the carburetor alone will yield limited results. Performance improvements are achieved by adjusting the carburetor to match other engine modifications. For example, when installing a high-flow air filter or a low-restriction exhaust, the engine's air-fuel mixture requirements 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.
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