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NGK Racing Spark Plug [R2525-10]

R2525-10 - R2525-10
For Ducati 748R, Monster S4, S4R, ST4R and others.
Pricing: $39.95
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Description

For many years NGK Spark Plugs has been firing racing engines throughout the world. NGK Spark Plugs has become an icon in spark plug technology and we pride ourselves in offering racers a high quality product that will help rocket them to victory. We realize race teams push their vehicles to the edge. Knowing this we design every NGK Spark Plug to withstand severe mechanical and thermal shock associated with these high-revving, high-compression race engines. As a result of our superior quality, you'll have confidence knowing you have the World Leader in spark plug technology firing your way to victory.

To withstand the severe conditions that occur in racing engines, NGK Racing Spark Plugs feature electrode materials and configurations as follows:

• Electrode materials - Many use precious metals such as platinum or gold/palladium for greater durability and lower voltage requirements.
• Electrode configurations - Fine-wire center electrodes provide better sparking and enhanced ignitability. Fine-wire ground electrodes further improve the ignitability of the plug.
• Insulator configurations - Special configurations are used for the insulator noses to improve throttle response.

Fits: Ducati 748R, Monster S4, S4R, ST4R and others.
See the "Details" tab for a detailed list.

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Video Installation



An over-torqued spark plug can suffer from severe stress to the Metal Shell which in turn can distort the spark plug's inner gas seals or even cause a hairline fracture to the spark plug's insulator...in either case, heat transfer can again be slowed and the above mentioned conditions can occur.

The spark plug holes must always be cleaned prior to installation, otherwise you may be torquing against dirt or debris and the spark plug may actually end up under-torqued, even though your torque wrench says otherwise. Of course, you should only install spark plugs in a cool engine, because metal expands when its hot and installation may prove difficult. Proper torque specs for both aluminum and cast iron cylinder heads are listed below.

Spark Plug Type Thread Diameter Aluminum Clyinder Head (lb-ft.)

Flat seat type (with gasket)

18 ø mm - 25.3~32.5
14 ø mm - 18.0~21.6
12 ø mm - 10.8~14.5
10 ø mm - 7.2~8.7
8 ø mm - 5.8~7.2

Details

Shipping Information

  • Item Requires Shipping
  • 1.0 lbs.
  • W2.0000” x H1.0000” x L1.0000”

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