NGK Spark Plug - #6263/04 — Harley-Davidson Road King, Road King Special, Electra Glide Ultra Classic (2015-2019)

NGK spark plug #6263/04 (CR9E) for V-twin motorcycles, including Harley-Davidson and Indian models. A genuine OEM-quality replacement that fires reliably across a wide RPM range.

Features

• OEM-quality construction
• Fits standard V-twin spark plug threads
• Made in Japan

Specifications

• Brand: NGK
• Manufacturer Part #: 6263
• UPC: 087295162637
• Length: 2.8 in
• Width: 0.8 in
• Height: 0.6 in
• Weight: 0.05 lbs
• Country of Origin: Japan

Fitment

Fits V-twin motorcycles, including Harley-Davidson and Indian Motorcycle models with standard spark plug threads.

Frequently Asked Questions

Will this plug fit my Harley or Indian?

Yes — this NGK #6263 is a direct replacement for standard V-twin spark plug sockets found on most Harley and Indian models.

What's the difference between NGK and other spark plug brands?

NGK is an OEM-trusted manufacturer for motorcycle ignition systems. This plug meets the same firing and heat-range specs as factory original equipment.

How often should I replace my spark plugs?

Inspect plugs at regular service intervals. Most V-twin riders replace them every 10,000–15,000 miles or per manufacturer recommendation.