NGK 5722 Standard Spark Plug (BR9ES) - Copper Core, Nickel Electrode for ATV, Motorcycle and Snowmobile Engines

The NGK 5722 is a Standard series spark plug (NGK part BR9ES) built around a solid copper core for strong heat dissipation and reliable conductivity across a broad heat range. The plug carries a corrosion-resistant plating that makes installation and removal easier over the life of the engine, and it uses a nickel ground electrode with a nickel center electrode tip backed by a copper core, giving it steady, consistent firing performance. A 5000 ohm resistor design helps suppress electrical interference from the ignition system. NGK's Standard line has served as an OE-level cornerstone plug for decades, making the 5722 a straightforward, dependable replacement rather than a specialty performance upgrade.

The 5722 is intended for small-engine applications rather than automotive use, with confirmed fitment across ATV, motorcycle, and snowmobile platforms as listed below. Always confirm the correct plug against your engine's owner or service manual before installing, since using the wrong plug can reduce performance, hurt fuel economy, or damage the engine.

Specifications

• Brand: NGK
• Manufacturer Part Number: 5722
• NGK Plug Designation: BR9ES
• Resistance: 5000 ohms
• Ground Configuration: Standard Ground
• Ground Electrode Core Material: Nickel
• Center Electrode Core Material: Copper
• Center Electrode Tip Material: Nickel
• Insulator Material: Ceramic (alumina silicate)
• Thread Size: M14x1.25
• Gap Size: 0.03 inches
• Weight: 0.15 pounds
• UPC: 087295157220

Fitment

• ATV: Honda (1982-1988)
• Motorcycle: Aprilia (2000-2006)
• Motorcycle: Gas Gas (2001)
• Motorcycle: Honda (1983-1985)
• Motorcycle: KTM (1996-2004)
• Motorcycle: Yamaha (1983)
• Snowmobile: Arctic Cat (1973-1997)
• Snowmobile: John Deere (1981-1982)

Replaces (OEM)

• Honda 9807959816
• Honda 9807959847
• Honda 9807959876
• Piaggio AP8206915
• Porsche 99917001490

Frequently Asked Questions

What is the NGK 5722 spark plug? The NGK 5722 is a Standard series spark plug, identified by NGK as the BR9ES, built with a copper core and nickel electrodes for reliable ignition performance in small engines.

Does the NGK 5722 fit outboard motors? Confirmed fitment for the NGK 5722 (BR9ES) covers ATV, motorcycle, and snowmobile applications from Honda, Aprilia, Gas Gas, KTM, Yamaha, Arctic Cat, and John Deere; no outboard or marine engine fitment is listed for this specific plug.

What years of Honda ATVs use the NGK 5722? Honda ATV applications for the NGK 5722 (BR9ES) run from 1982 to 1988; Honda motorcycle fitment for the same plug covers 1983 to 1985.

What is the thread size and gap on the NGK 5722? The NGK 5722 spark plug uses an M14x1.25 thread size with a gap of 0.03 inches.

What electrode and insulator materials does the NGK 5722 use? This plug pairs a copper core center electrode with a nickel center electrode tip and a nickel ground electrode, set in a ceramic (alumina silicate) insulator.

How much does the NGK 5722 weigh? The NGK 5722 spark plug weighs 0.15 pounds.

Is the NGK 5722 resistor type? Yes, the NGK 5722 (BR9ES) has a 5000 ohm resistance rating to help suppress ignition interference.

What OEM part numbers does the NGK 5722 cross-reference to? The NGK 5722 (BR9ES) is equivalent to Honda 9807959816, 9807959847, and 9807959876, Piaggio AP8206915, and Porsche 99917001490.

Does the NGK 5722 fit KTM motorcycles? KTM motorcycle fitment for the NGK 5722 (BR9ES) spans 1996 to 2004.

Is the NGK 5722 an OE-spec plug or an aftermarket performance plug? The NGK 5722 is part of NGK's Standard line, positioned as an OE-cornerstone plug rather than a specialty performance upgrade.

Does the NGK 5722 fit snowmobiles? Yes, snowmobile fitment for the NGK 5722 (BR9ES) includes Arctic Cat from 1973 to 1997 and John Deere from 1981 to 1982.

How many spark plugs come in a package of the NGK 5722? The NGK 5722 (BR9ES) is sold as a single spark plug per package.