NGK BPR7HS Standard Resistor Spark Plug (Stock # 6422)

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NGK BPR7HS Standard Resistor Spark Plug (6422)

Keep your engine running at peak performance with the industry standard in ignition reliability.

The NGK BPR7HS is a high-quality, copper-core spark plug designed for superior heat dissipation and consistent ignition. Engineered for a wide range of small petrol engines, this resistor-type plug is essential for modern applications as it reduces electromagnetic interference with onboard electronics like GPS and fish finders. Whether you are maintaining a 2-stroke outboard motor, a 50cc scooter, or a compact generator, the BPR7HS delivers the reliable starting and smooth idling that professionals trust.

Key Features & Benefits

• Superior Heat Removal: Features a 98% pure copper core for increased conductivity and better heat dissipation, preventing overheating and extending plug life.
• Anti-Fouling Design: The projected insulator tip helps prevent carbon buildup and misfiring, even under variable loads.
• Corrosion Protection: Treated with trivalent metal plating to provide superior anti-seizing and anti-corrosion properties—no anti-seize compound required for installation.
• Flashover Prevention: Corrugated ribs on the alumina silicate ceramic insulator eliminate electrical leakage (flashover) for a guaranteed spark every time.
• Resistor Technology: The integrated 5k Ohm resistor minimizes electronic noise that can disrupt sensitive equipment.
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NGK BPR7HS Standard Resistor Spark Plug (6422)

Keep your engine running at peak performance with the industry standard in ignition reliability.

The NGK BPR7HS is a high-quality, copper-core spark plug designed for superior heat dissipation and consistent ignition. Engineered for a wide range of small petrol engines, this resistor-type plug is essential for modern applications as it reduces electromagnetic interference with onboard electronics like GPS and fish finders. Whether you are maintaining a 2-stroke outboard motor, a 50cc scooter, or a compact generator, the BPR7HS delivers the reliable starting and smooth idling that professionals trust.

Key Features & Benefits

• Superior Heat Removal: Features a 98% pure copper core for increased conductivity and better heat dissipation, preventing overheating and extending plug life.
• Anti-Fouling Design: The projected insulator tip helps prevent carbon buildup and misfiring, even under variable loads.
• Corrosion Protection: Treated with trivalent metal plating to provide superior anti-seizing and anti-corrosion properties—no anti-seize compound required for installation.
• Flashover Prevention: Corrugated ribs on the alumina silicate ceramic insulator eliminate electrical leakage (flashover) for a guaranteed spark every time.
• Resistor Technology: The integrated 5k Ohm resistor minimizes electronic noise that can disrupt sensitive equipment.
Need a new cap? The NGK 90° spark plug cap is available online (SKU: SPCAP). 

Original Parts For Scooters SKU 145-38


Specifications:

• Thread Size: 14mm
• Reach: 12.7mm (1/2 inch)
• Hex Size: 20.6mm (13/16 inch)
• Gap: 0.7mm (.028 inch)
• Heat Range: 7
• Packaging may vary from product photo

Compatibility:

Genuine Buddy 50	Genuine Rattler 50
Genuine Rattler 110	Genuine Black Cat 50
Genuine RoughHouse 50

139QMB-based 50cc / 80cc engines with the following engine codes:

139QMA	139QMB	1P39QMB	1P39QMA-2
YN139QMB	JJ1P39QMB	139FMA-2	BD1P39QMB
BN139QMB	147QMD	Other QMA models	Other QMB models

Don't see your engine listed? If the engine code includes "QM" or "FM", and the plug you currently use meets the specs above, this product is compatible with your vehicle.

Popular Applications

This plug is a direct OEM replacement for many popular small engines, including:

• Marine: Mercury 4HP, 5HP, and 15HP 2-stroke outboards; select Yamaha, Evinrude, and Johnson models.
• Scooters: Yamaha Jog 50cc, Genuine Buddy 50, RoughHouse 50, and most 139QMB-based 2-stroke engines.
• Small Machinery: ATVs, compact generators, pumps, and pressure washers.

About NGK: With over 80 years of automotive expertise, we are driven by extreme dedication to performance and quality. From OEM to aftermarket, our people push the boundaries of innovation to bring the latest technologies to market under the NGK and NTK brands.

Brands: Amstar, Amigo, Ascend, Baotian, Bashan, Blade, Boom, Chicago Scooter Company, Dongfang, Roketa, Baotian, Bashan, BMS, Cool Sports, E Ton, Fly Wing, Eagle, Fly, Italica, Riya, Ice Bear, Jackel, Jet Moto, JCL, Taotao, Peace, JM Star, Jonway, Kazuma, Keeway, KMD, Kymco, Lance, Lifan, Linhai, Loncin, Longbo, Fuxin, Jiajue, Tao Tao, Tao Motors, Trailmaster, Maxtrade, Meitien, Motofino, Motorino, NST, Panterra, Panther, Qlink, Yiben, Red Streak, Redcat, Roketa, Schwinn, Strada, SYM, Tank, Terminator ,Tomberlin, TNG, United Motors, Vento, Vitacci, Wildfire, Wolf, X-Treme, X-Pro, Yongfu, ZNEN, Zhongneng , Zhilong, Geely, Wangye, ZH and more Manufactured by: Taizhou Zhongneng Motorcycle Co.; Jiangsu Zhongneng Motorcycle Co.; Jiangsu Meijunte Technology Co.; Taizhou Qianxin Vehicle Co.; Ningbo Dongfang Lingyun Vehicle Made Co.; Taizhou Zhilong Technology Co.; Zhejiang Jiajue Motorcycle Manufacturing Co.; Zhejiang Gelly Ming Industrial Co.; Taizhou City Senglong Motorcycle Manufacture Co.; Jiangsu Sacin Motorcycle Co.; Jiangsu Linhai Power Machinery Group Co.; Zheijiang TaoTao Vehicles Co.; Zhejiang Senling Motorcycle Co.; Sanmen County Yongfu Machine Co; Taizhou Jiaojiang Zhiwei Motorcycle Manufacture Co.; Huzhou Daixi Zhenhua Technology Trade Co.; Taizhou Zhongneng Motorcycle Co.; Zhejiang Riya Motorcycle Co.; Ningbo Longjia Motorcycle Co.; Taizhou Zhongneng Motorcycle Co.; and more