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

Product Information

The metal in a spark plug has a single purpose: to channel the electrical energy through the spark plug. Iridium is far harder than copper and this allows the spark plug manufacturers to create a plug with a sharper ‘tip’ which better focuses the spark around the centre electrode without compromising its service life. Spark plugs are often called "hot" or cool or anything inbetween... This has NOTHING to do with how hot the fuel burns. It has to do with how hot the spark plug gets.

CR9EIX - Alternative spark plugs - Spark plug cross reference NGK CR9EIX - Alternative spark plugs - Spark plug cross reference

If you’ve not changed your plugs before, give yourself a couple of hours to complete the task. Here are the essentials you need for smooth re-plugging: This is why you can't 1. hurt your engine with the wrong plugs... you can only hurt your plugs. and 2. Plug slection has no affect on engine performance or horse power... If your plug is fireing during every power stroke... that's the best it can do. Fatter spark, bigger spark, super jiggy spark Doesn't matter... if the fuel/air mix is being ignited every time... that's as good as it gets. Mind you, there are 1000 things that can mess with "fireing every power stroke" but you won't get more power using a "hotter" plug. A typical copper spark plug will last around 20,000 miles and most get changed at a major service (usually around 16,000 miles) but an iridium spark plug will be good for around 50,000 miles and you do see people running them to 100,000 miles with no issues. The fakes terminal cap shape is pretty accurate, however cast mold lines are visible, unlike the genuine plug.you will notice in the first picture by -AK- you can see the spark plug throat, that is the electrode and ceramic insulator and then space between the threaded material and the electrode/ceramic insulator. How far up inside the spark plug does that space go? The fakes terminal caps were finger tight, whereas the genuine caps couldn’t be undone by hand and needed pliers. PLEASE NOTE – This article was written a few years ago so not all information provided may be accurate. For example, on some part numbers, NGK now uses Laser Etching instead of stamping, so the font information may not be accurate. Another Sparking Discovery

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

This nifty little tool only costs a few quid and will help you set the correct gap for your spark plug. However, modern plugs are almost all motorcycle-specific fit and so they come ‘pre-gapped’ and you won’t need to touch them. If you’re running a classic bike, you’ll probably need to set your gap and if your bike’s not running right, a gap tool can help you rule out a potential incorrect gap issue. NGK is the brand leader in the UK spark plug market and are the world's biggest supplier to many major car manufacturers. Each and every one of their products are designed to meet the most rigorous standards and are the professionals' choice because of their quality and technical excellence. Their plugs can be found in use by teams in F1, WRC and MotoGP. Put simply, NGK genuine spark plugs are the workhorse at the heart of smooth-running engines around the world. Install each spark plug by hand until you have wound the thread a couple of turns. This reduces the chances of you cross-threading the plug. A regular spark plug uses a copper central electrode whereas an iridium spark plug uses, you guessed it, iridium. so the uber smart engineers calculate that heat transfer path, the average temp for the engine at full throttle and full load, and at idle... proposed engine coolent temp limits and toss in 20% safety margin and then design a plug that will hold self cleaning temps over the widest range of engine RPM, ambient temp, etc. with out ever reaching "burn out" temp and volia' you have a plug for your specific engine.

A spark plug fouls with every single power stroke of the engine, as the fuel burns a deposit of soot forms on the electrode. Form enough deposit, the gap resistance changes and the plug either is resisted out or shorted out, neither of which will fire the cylinder. If the plug is brown or light grey your can assume your engine is in good condition and the spark plug is functioning well. Even when a plug is in good condition small deposits will accumulate. This is normal. Rich If the engine is running dangerously lean the whole plug tip will be grey or white. If the temperature is over 850-degrees, pre-ignition may occur. Engine power will be reduced and you risk piston damage. Maybe it's time for a little spark plug 101 as it was explained to me by a guy who didn't spout any BS.