Champion Spark Plug Spark Plug P/N:91
Keep a strong, consistent spark firing in hard-working engines with the Champion 654 Spark Plug, a G59C plug from Champion's racing plug line. It is built to deliver rapid, consistent combustion and to hold spark integrity under intense heat and pressure. It fits many vehicles, among them the 2004-2009 Honda CRF250X, 2012-2021 Honda CRF150R and 2012-2021 Honda CRF150R Expert. See the "Vehicles it fits" section for the full list.
Specifications: The plug type is G59C. It has a copper center electrode tip and a flat seat, and it is a non-resistor plug. A crush washer is included. Quantity per application varies by vehicle, and the Honda models named above use one plug. Country of origin: China.
Interchange: U3CC · G3 · G59C · 1275 · 6955 · 7471 · 7499 · C7E · C8E · CR6E · CR7E · CR8E · CR9EB · IMR9D9H · R0179 · R0373A9
This part cross-references / interchanges with the following part numbers:
Is the Champion 654 the right CRF250X spark plug for my 2005 bike?
Yes. It is listed as a direct-fit application for the 2004-2009 Honda CRF250X, which includes 2005 models, and that bike uses one plug.
Does this spark plug fit the 2012-2021 Honda CRF150R?
Yes. It is listed for the 2012-2021 Honda CRF150R and the 2012-2021 Honda CRF150R Expert, and each uses one plug.
What are the key specifications of the Champion 654?
It is a non-resistor G59C plug with a copper center electrode tip and a flat seat, and it comes with a crush washer.
Is a washer included with the plug?
Yes. The plug comes with a crush washer for its flat seat.
What are signs a spark plug may need replacing?
Hard starting, misfires, rough running, loss of power, or a fouled or worn electrode are common signs. Diagnose the cause before replacing parts.
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WARNING: These products can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.