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A7RTC Spark Plug for GY6 50cc-150cc ATV Scooter Go Kart
A7RTC Spark Plug for GY6 50cc-150cc ATV Scooter Go Kart
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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
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Fitment FAQ
Will this part fit my specific model and year?
This A7RTC spark plug may fit many GY6 50cc-150cc engines, including 139QMB, 154QMI, and 157QMJ applications, as well as selected motorcycles, ATVs, scooters, go karts, mopeds, and dirt bikes. Fitment depends on the original spark plug model, thread size, reach, hex size, and engine requirement rather than model year alone.
Do I need to match the OEM part number?
Matching the OEM part number or spark plug model is strongly recommended. Please confirm your original plug is A7RTC, A7TC, CR7HSA, C7HSA, or another compatible cross-reference before ordering. Also check the M10×1 thread, 12.7mm reach, 16mm hex, and 0.6mm gap.
What models or situations does this part not fit?
This spark plug may not fit engines requiring a different thread size, longer or shorter reach, different heat range, non-resistor plug type, or different hex size. It is not suitable if your original spark plug specification does not match A7RTC or a compatible replacement number.
What should I check before ordering?
Before ordering, check your original spark plug model number, engine type, thread size, reach, hex size, gap, and product photos. Make sure the plug matches A7RTC specifications: M10×1 thread, 12.7mm / 0.5" reach, 16mm / 0.63" hex, and 0.6mm / 0.0236" gap.