A7RTC Spark Plug for GY6 50cc-150cc ATV Scooter Go Kart

Product Overview

This A7RTC resistor spark plug is designed as a replacement part for many GY6 50cc, 70cc, 90cc, 100cc, 110cc, 125cc, and 150cc engines used on motorcycles, ATVs, quads, scooters, go karts, mopeds, choppers, buggies, and dirt bikes.

The spark plug helps create a stable ignition spark for fuel combustion, supporting smoother starting, stable idling, better throttle response, and cleaner engine operation. A worn or fouled spark plug may cause hard starting, misfiring, weak acceleration, poor fuel economy, or unstable engine performance.

This A7RTC plug features an M10×1 thread size, 12.7mm reach, 16mm hex, and 0.6mm gap. Please compare the model number, thread size, reach, hex size, and product photos with your original spark plug before ordering.

Product Compatibility

Compatible Engine / Vehicle	Applications
GY6 Engine	50cc / 70cc / 90cc / 100cc / 110cc / 125cc / 150cc
139QMB / 154QMI / 157QMJ	Compatible scooter and small engine applications
Motorcycle / Scooter / Moped	Compatible models using A7RTC or equivalent plug size
ATV / Quad / Go Kart	Compatible small engine ignition systems
Dirt Bike / Pit Bike	Selected CRF80F, CRF100F, XR80R, XR100R, TTR50E, TTR125, KLX140 applications when plug size matches

Replacement / Cross Reference Numbers

Replacement Type	Compatible Numbers
Spark Plug Model	A7RTC
Common Replacements	A7TC, CR7HSA, C7HSA
Other Cross References	4549, 4629, DESO 4008, U22FSR-U, 5383, IUF22, Bosch UR3AS, Champion Z9Y, Copper Plus 808

⚠️ Cross-reference numbers are for size and compatibility reference only. Please confirm your original spark plug model and specifications before purchase.

Specifications

Item	Details
Product Type	Resistor Spark Plug
Model	A7RTC
Thread Size	M10 × 1
Reach	12.7mm / 0.5"
Hex Size	16mm / 0.63"
Gap	0.6mm / 0.0236"
Compatible Engine Size	50cc-150cc, selected 125cc-300cc applications when size matches
Application	Motorcycle / ATV / Scooter / Go Kart / Moped / Dirt Bike
Condition	100% Brand New

Key Features

• A7RTC resistor spark plug for GY6 50cc-150cc engines and compatible small vehicles
• Replaces A7TC, CR7HSA, C7HSA, and other compatible spark plug models
• Helps provide stable ignition for smoother starting and engine operation
• Integrated resistor helps reduce electromagnetic interference for compatible electrical systems
• Suitable for replacing worn, fouled, damaged, or weak spark plugs