NGK SPARK PLUGS BR8HS 4322 Spark Plug 10 Pack

OVERVIEW

NGK BR8HS spark plugs deliver stable ignition across diverse marine and light-displacement platforms, ensuring consistent starting power and reliable combustion cycle timing. Each element combines a copper-core conductor with high-alumina ceramic insulators to maintain precise heat management under varying load conditions. Designed for direct bolt-in service, these plug assemblies support prolonged operation in watercraft, minibikes, and recreational motorcycles.

ENGINEERING & PERFORMANCE

The deep-seated copper core expands the thermal window, allowing the element to clear deposits during cool-idle duty while resisting preignition thresholds during sustained high-RPM runs. High-alumina ceramic insulation improves radial heat dissipation and blocks stray current, reinforcing spark consistency across fluctuating voltage environments. The nickel-alloy center electrode tolerates thermal cycling without warping, and the standardized BR8HS mounting pattern aligns with factory head ports for straightforward swap-out without adapter fabrication.

KEY FEATURES

• Wide operating heat range reduces carbon fouling at low throttle and prevents preignition under full load
• High-alumina ceramic insulator provides reliable electrical isolation and thermal conductivity
• Deep-seated copper core stabilizes internal heat transfer across demanding duty cycles
• Nickel alloy center tip resists electrode erosion for prolonged service intervals
• Standard thread reach and hex configuration enable direct OEM-style replacement
• Sold as a 10-pack set for scheduled maintenance rotation or workshop inventory

TECHNICAL SPECIFICATIONS

• Brand: NGK
• Part Name: BR8HS Spark Plug
• OEM Cross Reference: 4322
• Component Type: Spark Plug
• Material: Copper Core / High-Alumina Ceramic / Nickel Alloy Tip
• Supported Years: 1977–2010 (per listed applications)
• Compatible Trims: Watercraft, Minibikes, and Light Displacement Motorcycles

FITMENT

• Yamaha XA 800 (2000–2004)
• Yamaha SJ 700 (2002–2004)
• Yamaha XL 700 (1999–2004)
• Yamaha SV 1200 (1999–2004)
• Yamaha GP 800 (1999–2000)
• Yamaha XL 760 (1998–1999)
• Yamaha GP 760 (1997–2000)
• Yamaha GP 1200 (1997–1999)
• Yamaha WVT 760 (1997)
• Yamaha WVT 700 (1995–1996, 1998)
• Yamaha WVT 1100 (1996–1997)
• Yamaha WB 760 (1996–1997)
• Yamaha WRA 700 (1996–1997)
• Yamaha WaveRaider 760 (1996)
• Yamaha WaveRaider 1100 (1995–1996)
• Yamaha WaveRaider 700 (1994–1996)
• Yamaha WB 700 (1993–1996)
• Yamaha WRB 700 (1993–1994)
• Yamaha BW 50 (1992)
• Yamaha BW Next Generation 50 (1996)
• Yamaha Spy (1995–1998)
• KTM 50 Mini Adventure (2002)
• KTM 50 Senior Adventure (2002)
• KTM 50 Junior Adventure (2002)
• KTM 125 EXE (1999)
• Benelli Naked 50 (2001–2002)
• Benelli Pepe 50 LX (1999)
• Beta Ark 50 LC (1998–2010)
• Beta Ark 50 K (1998–2003)
• Aprilia Area 51 (1998–2000)
• Aprilia Rally 50 (1996–2001)
• Aprilia Gulliver 50 (1996–1998)
• Aprilia SR 50 (1994–2001)
• Italjet Formula 125 (1998)
• Italjet Dragster 50 (1998)
• Honda MB50 (1982)
• Yamaha CF 300 Inviter (1977–1978, 1986–1991)

WHY RIDERS CHOOSE THIS

Riders select the NGK BR8HS because the ceramic-to-copper thermal balance keeps the plug functional across the wide operating gaps typical of watercraft and competition minibikes. The enlarged heat range stops deposits from building during idle-heavy runs and pushes excess热量 away when throttle remains pinned, maintaining crisp spark energy through seasonal changes. Factory-matched threading and reach eliminate custom prep work, so swaps stay clean and secure. When paired with proper gap verification, this setup delivers predictable starts, stable fuel-air combustion, and dependable mid-range response right out of the box.