Carburetor Tuning
These guidelines should be followed when installing carburetors and other Keihin products:
To avoid injury, carburetors should be installed when the engine is cold.
Read the owners manual for your vehicle before installing any Keihin product to prevent any damage to the vehicle due to improper installation.
Gasoline is extremely flammable and can be explosive under certain conditions. Installations should be done in a well-ventilated area.
Installation of products in this catalog should be done by an experienced mechanic or service technician.
Keihin carburetors are only legal in California for racing vehicles, which may never be driven on public highways or waterways.
Keihin carburetors are designed to be used with normal pump gasoline. Fuels that contain over 10% alcohol content may damage parts in the carburetors. This may prevent the carburetor from functioning properly.
Jetting Your Slide Valve Carburetor
(PDF)
Jetting Your CDKII Diaphragm Carburetor
(PDF)
Jet List
(PDF)
Slide Chart
(PDF)
Jet Needle Changes For FCR, FCR-MX
(PDF)
Jet Needle Changes For PJ, PWK, OEM-N427-48xxx
(PDF)
Jet Needle Changes For PE (20mm-24mm), PE, PWK
(PDF)
Jet Needle Changes For CRS
(PDF)
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317-462-3015