NGK Iridium Plugs

There have been many posts on many forums about Iridium Plugs and if they are worth the extra cost.
I personally fit them to every bike I own as I have only found proven clear benefits using them, especially in the Z1300 with its prehistoric ignition system.!
The benefits I have found with the 1300 are :-

Improved easier Starting.
Smoother and more stable idle.
Smoother acceleration.
Better all round performance
No fouling.

They also last more than twice the mileage of regular plugs and never need gapping, so the extra cost is covered in reality.
If you have not tried them, then I suggest you do as I am sure you will be impressed.
The video below shows some pretty solid proof they are superior



Pete F
UK (the undemocratic country)

Keep in mind, on our bikes (and others that utilize dual fire coils), half the plugs are 'firing' backwards; that is: firing from the 'ground electrode' (it's not a 'ground' on a dual output coil circuit) to the centre electrode of the plug. Not sure how much the iridium centre electrode is a benefit under those conditions. Whenever I pull the spark plugs (I have iridium plugs), I always re-install them in their opposite coil partner's position (never noticed any difference though).

Simple factual answer..................

The quality of spark is far superior with Iridium Plugs than a regular type plug..............thats the difference, twin core or not.

Dont knock them until you have tried them............THEY MAKE A SIGNIFICANT DIFFERENCE or I would not bother making comment !!!!

Pete F
UK (The undemocratic country)

Must admit I did notice a difference using iridium plugs too Pete, I also went one grade hotter (NGK BPR5EIX) & that also seemed to make a difference.

Just completed a 2700 km tour of Northern Europe with Iridium plugs, not a single problem with starting or running, even in 34 degrees C in city queues. Full agreement on the plugs with you Pete!

Getting on board with this experiment. The bike is very responsive, pretty much not needing ANY choke to start, crisp at the throttle as a crisp can be. These plugs will be arriving soon as I place the order - any treat the bike needs... NGK BPR5EIX - >>>>> the engine blows up I'll be hunting you Phil! haha

>>> NGK BPR5EIX >>> what's the gap?