NGK Spark Plug P/N:BR9ES
NGK JR9C spark plug for the 1989-1998 Suzuki GSX750F Katana 748cc and other vehicles fires the spark that ignites the fuel mixture in each cylinder. It is best for vehicles with OE nickel alloy plugs and is not recommended where the factory fitted precious metal plugs.
Hard starting, a rough idle or a misfire can mean a plug is worn, but fuel and ignition faults feel much the same. With the engine off and cool, look at the electrode for wear and the ceramic for cracks, and leave any test that needs the engine running to a shop.
This plug fits the 1989-1998 Suzuki GSX750F Katana 748cc and the 1988-1989 Suzuki GSX-R750 749cc. Each cylinder takes one plug.
Fit and size
Build and materials
Interchange: 09482-00397
RAX92DC · 6193
This part cross-references / interchanges with the following part numbers:
Does the NGK JR9C fit the 1989-1998 Suzuki GSX750F Katana 748cc?
Yes. NGK JR9C is listed for the 1989-1998 Suzuki GSX750F Katana 748cc and the 1988-1989 Suzuki GSX-R750 749cc.
What thread size does the NGK JR9C spark plug have?
The NGK JR9C has a metric M12 - 1.25 thread. The threads are cold-rolled, which helps prevent cross-threading and damage to cylinder heads.
What are the electrode and core of this spark plug made from?
This plug has a nickel alloy center electrode and a solid copper core that is 98% pure. The insulator is high grade alumina silicate ceramic.
Are NGK spark plugs like the JR9C right for an engine with factory precious metal plugs?
No. The NGK JR9C is not recommended on vehicles with factory precious metal plugs. It is meant for engines that use OE nickel alloy plugs.
Is NGK stock number 6193 the same plug as the JR9C?
Yes. 6193 is NGK's own stock number for the JR9C, so both numbers name the same plug. The Interchange line on this page lists the other brands' and OE numbers it replaces.
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