NGK's CR8EH-9 spark plug gives your Genuine Stella 4T, Stella Automatic, Honda Ruckus and other 139QMB and GY6 bikes a consistent, reliable spark to get them up and moving. Pick up a couple to keep in your glove box just in case. Need a new cap? The NGK 90° spark plug cap is available online (SKU: SPCAP). 

Original Parts For Scooters SKU 145-23

Specifications:

• Thread Size: 10mm
• Reach: 19mm (3/4 inch)
• Hex Size: 16mm (5/8 inch)
• Half Thread Type: 12.7mm (1/2 inch) threaded 
• Gap: 0.9mm (.035 inch)
• Heat Range: 8
• Does not include terminal nut
• Packaging may vary from product photo

Compatibility:

139QMB-based 50cc / 80cc engines with the following engine codes:

157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes:

Don't see your engine listed? If the engine code includes "QM" or "FM", and the plug you currently use meets the specs above, this product is compatible with your vehicle.

About NGK: With over 80 years of automotive expertise, we are driven by extreme dedication to performance and quality. From OEM to aftermarket, our people push the boundaries of innovation to bring the latest technologies to market under the NGK and NTK brands.