NGK

NGK Spark Plug R6918B-7 (6259) Single

Name: NGK Spark Plug R6918B-7 (6259) Single
Brand: NGK
SKU: NGKR6918B7

Spark PlugsSKU NGKR6918B7

Cheapest we found

$84.10

at XPERT Moto Gear

$84.10 lowest$101.90 highest

9 recent in-stock prices · spread $17.80 (21%)

Based only on in-stock prices checked in the last 30 days. 9 stores checked; dates for every store are shown below.

Recorded store prices

Prices we recorded when we last checked each store for this exact variant.

XPERT Moto Gear$84.10CheapestIn stockchecked today

6 stores at this price$94.49

Adventure On StoreIn stockchecked today Coffs MotorsportsIn stockchecked today Cully's YamahaIn stockchecked 8 days agomay be out of date Gold Coast Dirt Bike PerformanceIn stockchecked today Shark LeathersIn stockchecked today V-Twins MotorcyclesIn stockchecked 6 days ago

MotoHeaven$94.99In stockchecked yesterday Riders Market$101.90In stockchecked 2 days ago

Prices RIDERNIP recorded for NGK Spark Plug R6918B-7 (6259) Single, with stock states and check dates
Store	Price	Stock	Last checked
Visit XPERT Moto GearXPERT Moto Gear	$84.10Cheapest	In stock	checked today
Visit Adventure On StoreAdventure On Store	$94.49	In stock	checked today
Visit Coffs MotorsportsCoffs Motorsports		In stock	checked today
Visit Cully's YamahaCully's Yamaha		In stock	checked 8 days agomay be out of date
Visit Gold Coast Dirt Bike PerformanceGold Coast Dirt Bike Performance		In stock	checked today
Visit Shark LeathersShark Leathers		In stock	checked today
Visit V-Twins MotorcyclesV-Twins Motorcycles		In stock	checked 6 days ago
Visit MotoHeavenMotoHeaven	$94.99	In stock	checked yesterday
Visit Riders MarketRiders Market	$101.90	In stock	checked 2 days ago

Product details

NGK have over 80 years of experience in spark plug manufacturing and are the world leader in spark plug technology. NGK has an extensive range of spark plugs, each with their own unique characteristics specifically engineered to its application and designed to suit a broad range of motorcycles, ATVs & UTVs in Australasia. With NGK's dedication to quality, outstanding reliability and state of the art manufacturing techniques, you can rely on your NGK Spark Plugs.

Don’t just ask for a spark plug, insist on NGK.

Specially constructed with a gold-palladium central electrode with a diameter of 1.00mm. This specialty tip has a high power of heat dissipation, greater resistance to critical conditions of operation of competition engines and excellent ignition. These characteristics are highly required in engines prepared for high performance.

Shell

Thread Size: 14mm
Thread Pitch: 1.25mm
Seat Type: Gasket
Resistor Value: 5K Ohm
Reach: 19mm (3/4")
Hex Size: 21mm (13/16")
Terminal Type: Solid
Overall Height: ISO
Gap: 0.6mm (0.024")

Centre Electrode

Material: Platinum
Type: Fine Wire
Size: 1.0mm
Projection: Non-Projected

Ground Electrode

Material: Nickel
Type: Slant
Quantity: 1

Specifications

Heat Range: 7
Resistor: Yes

Price history

Recorded changes for this exact variant.

1XPERT Moto Gear2 points · last checked 22 Aug 2026
2Adventure On Store1 point · last checked 22 Aug 2026
3Coffs Motorsports1 point · last checked 22 Aug 2026
4Cully's Yamaha3 points · last checked 14 Aug 2026
5Gold Coast Dirt Bike Performance1 point · last checked 22 Aug 2026
6Shark Leathers3 points · last checked 22 Aug 2026

3 more store series are not shown to keep the chart readable.

Solid steps show periods confirmed by the store’s change-only price history and completed crawl record: if the price had changed at a check, another point would appear. Dashed steps show overdue periods with no completed crawl confirmation. Every line stops at that listing’s last confirmed check and is never extended to today. Prices are not live and may have changed since the last point shown.

How we collect and compare prices