4 New NGK Iridium IX Spark Plugs CR9EIX # 3521 by NGK

Product Information

If you don’t have a torque wrench, then get the plug hand tight and then add a ½ turn for a plug with a gasket, and more like a ¼ turn for a tapered spark plug. Please be sure to check the 'Specifications' and 'compatibility' tabs, where applicable, to help confirm suitability for your vehicle or engine.

Aprilia Spark Plug Fitment Chart - Biker Rated Aprilia Spark Plug Fitment Chart - Biker Rated

Unfortunately for legal reasons we can’t name and shame, but we can once again provide you with photos and pin-pointers on how to spot dodgy ones. The longer insulator nose prevents fouling, the corrugated ribs on the insulator prevent flashover and a triple gasket seal eliminates combustion gas leakage. The likelihood is that they will possibly work, however it’s a huge risk and should be remedied at once. Form enough deposit, the gap resistance changes and the plug either is resisted out or shorted out, neither of which will fire the cylinder.

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• * Halfords and Halfords couriers deliver Monday to Saturday excluding bank holidays. Not only are these fake plugs not manufactured and tested to the same degree of the genuine item, they don’t actually feature any ‘iridium’ centre electrode tip at all! NGK is the leader in Motorcycle Spark Plugs, with spark plugs for virtually every Motorcycle, ATV, and Scooter application in the world.

  Harley Davidson Spark Plug Cross Reference - Biker Rated Harley Davidson Spark Plug Cross Reference - Biker Rated

  Before you throw your old spark plug in the bin, check them to get an understanding of how well your engine is running.
  
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  Step 1

  Ask a Halfords team member about flexible finance.

  Ngk CR9EIX irídium gyújtógyertya - Motoralkatrész webáruház Ngk CR9EIX irídium gyújtógyertya - Motoralkatrész webáruház

  Torquing down an M10 plug to 30nm will most definitely cause either distortion to the plug and eventually snap into bits, or the cylinder head thread will strip; not good. Small ‘chunks’ and ‘nicks’ have been taken out of the metal thread due to a blunt Dye threading tool. As stated above, the illustrations on the rear show installation procedures for an M14 threaded spark plug. If the plug is brown or light grey your can assume your engine is in good condition and the spark plug is functioning well. When you’ve removed your spark plugs, check the condition of the threads in the cylinder head and put a cloth over the cylinder head if you’re going to leave it exposed.
  
  You can use this weight as a guideline to measure your suspect CR9EIX plugs, the fake plugs were 155 grams in comparison. I'm guessing that an EFI bike like our GSXR's might never feel any different as most of the sooting on a plug comes from running the choke when cold.

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