Plug Colour/Color

[jasj]

I just switched my plugs over to Denso Iridium IXU27.
Noticed that my number one plug is very white almost furry and dry looking. Is this normal or doo I worry?

These plugs have done about 50 hours

[Green Hornet]

You are running lean. What mods do you have?

[11]

That's not lean, that's SUPER LEAN, richen or you will enrich your dealer...

[jasj]

Ok, What do I do to stop this? I have no engine mods except the Riva intake!

[Green Hornet]

You just have a power filter? What kind of gas are you using?

[jasj]

Normally Super unleaded, or optimax. The best possible fuel, think its about 97octaine. But I think UK octaine rating could be different to US rateing.

[Green Hulk]

The plugs look good to me

Maybe instead of going back with stockers go with some Denso iridium IXU27's

[Green Hornet]

Check and see if your flame arrestor hasn't worked loose or has a gap seeping in more air. What is your medium grade rating?

[jasj]

Phew!!! Thanks Jerry. I have just put Denso iridiums in so will check them again after my next ride.

[11]

Normally Super unleaded, or optimax. The best possible fuel, think its about 97octaine. But I think UK octaine rating could be different to US rateing.

97 Euro is not expressed like here in USA.

HEre in USA we call "92" a gas that is 97 RON and 87 MON, using the R+M/2 method that gives you 97+87/2=92.

Your 97 Euro gas is 97 RON, so roughly equivalent to US 92, do not use any less than that.

Don't you brits have 98 RON gas?