NGK NGK Iridium IX Spark Plug P/N:3903
NGK 4772 spark plug for the 1996-2009 Kawasaki EN500C Vulcan 500 LTD 499cc and other vehicles fires the spark that ignites the mixture in the cylinder. Among NGK spark plugs, the Iridium IX line is made for the performance enthusiast.
Hard starting, misfires or a rough idle can mean the plug is worn, though a weak ignition coil or a cracked plug cap can be behind them too, so find the cause before replacing it.
The list takes in the 1997-2009 Kawasaki EX500 Ninja 500R 498cc and the 1997-2005 Suzuki GSF1200S Bandit 1157cc as well as many other models. Open the "Vehicles it fits" section to check your exact model and engine. This listing is one spark plug, sold individually.
Fit and size
Build and materials
Interchange: DR9EIX
This part cross-references / interchanges with the following part numbers:
Does the NGK 4772 fit the 1997-2005 Suzuki GSF1200S Bandit 1157cc?
Yes. NGK 4772 is listed for the 1997-2005 Suzuki GSF1200S Bandit 1157cc. For another model or engine, check it in the "Vehicles it fits" section.
What thread size does the NGK Iridium IX spark plug 4772 have?
NGK 4772 has an M12 - 1.25 thread. NGK also lists this plug under part number DR9EIX.
Does the NGK 4772, one of the NGK iridium spark plugs, have a copper core?
Yes. The NGK 4772 has a solid copper core of 98% pure copper, a fine wire iridium tip on the center electrode and a tapered cut ground electrode.
Which wear signs on a plug like the NGK 4772 should I look for?
Hard starting, misfires, a rough idle or poorer fuel economy can mean a worn plug. With the engine off and cool, a worn or fouled electrode may be visible, and a shop can test the ignition.
Is the NGK 4772 a short style spark plug?
No. NGK 4772 is not a short style plug. Its trivalent metal plating gives anti-corrosion and anti-seizing properties for easier installation and removal.
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