Spark Plug for 2025-2026 Polaris 650 Indy Adventure 137 & More - NGK 6684

NGK 6684 spark plug for the 2025-2026 Polaris 650 Indy Adventure 137 650cc and other vehicles ignites the air-fuel mixture in each cylinder. Among NGK spark plugs, the Iridium IX line is made for the performance enthusiast.

• Fine wire 0.6 mm iridium tip on the center electrode for a stable spark and durability
• Iridium alloy center electrode, with a density six times that of platinum and a very high melting point
• Tapered cut ground electrode with a reduced quenching design for ignitability, acceleration and fuel efficiency
• Solid copper core, 98% pure copper, for heat dissipation, conductivity and wide heat ranges
• Trivalent metal plating for anti-corrosion and anti-seizing properties

Quick facts

• Part: NGK 6684 spark plug
• Fits: 2025-2026 Polaris 650 Indy Adventure 137 650cc and other vehicles
• Condition: New

Hard starting, a misfire or a rough idle can mean a plug is worn. Before you replace one, rule out the ignition coil, plug cap and fuel delivery, since any of them can also cause a misfire or hard start. Each cylinder takes one plug, so the 2025-2026 Polaris 650 Indy Adventure 137 650cc takes two, and the count changes with the engine.

Fits

The 2025-2026 Polaris 650 Indy SP 137 650cc and the 2025-2026 Polaris 650 Indy VR1 137 650cc are among the many vehicles this plug fits.

Specifications

Interchange: BY480-BPR8E
XS61 · XS61DP · MZ602087 · BPR8EIX