GY6 QMB139 Spark Plug – 50cc & 150cc | Copper or Iridium

GY6 QMB139 Spark Plug – 50cc & 150cc

Keep your GY6-powered scooter or mini bike running strong with the correct NGK spark plug. Available in copper core for reliable everyday performance or iridium for improved ignitability, longer service life, and better throttle response. Both are direct-fit replacements for QMB139 and GY6 engines.

Variants

• Copper Core – NGK CR7HSA – OEM-style replacement, reliable and affordable. Ideal for stock or lightly modified engines.
• Iridium – NGK CR7HIX – Fine-wire iridium tip for superior ignitability, reduced fouling, and extended plug life. Recommended for performance builds.

Specifications

• Thread Size: 10mm
• Reach: 19mm
• Hex Size: 16mm
• Heat Range: 7
• Copper SKU: CR7HSA
• Iridium SKU: CR7HIX

Compatible Engines

• GY6 50cc (QMB139)
• GY6 150cc (157QMJ)
• Most Chinese scooters, go-karts, and ATVs using GY6 architecture

Always verify your engine’s plug spec before ordering. Refer to your owner’s manual or existing plug markings.