Wrong spark plug?

[byron126]

Took the spark plug out today as it is the first time doing this on my bike since I bought it, should of done it as soon as I got the bike I know, however when I took the spark plug out to my surprise the writing on the plug said cr6e compared to the cr8e the service manual suggests to use. was just wondering if this could have any bearing on how the bike drives and preforms? and if it actually matters.
any help appreciated :)

[wideguy]

The numbers refer to heat range of the plug. The 6 will run hotter than the 8 under the same conditions.
What does the end of the plug look like? Too hot could cause pre-ignition (spark knock) and piston damage. Too cold will foul with fuel or oil.

[andrewsmith]

It should be cr8 type as the plug is specific to the sv heads. To my knowledge it's the only one to run it.

sent from the shredded wheat factory

[byron126]

The plug end looked okay, covered I'm carbon but the thread was college versed in nasty black oil? Excuse the dumbass mechanical knowledge haha

[Redmist]

The plug end looked okay, covered I'm carbon but the thread was college versed in nasty black oil? Excuse the dumbass mechanical knowledge haha

Predictive text turned on by any chance?

[yorkie_chris]

It should be cr8 type as the plug is specific to the sv heads. To my knowledge it's the only one to run it.

sent from the shredded wheat factory

nope, really quite common!

[wideguy]

Covered in carbon isn't the normal appearance of a plug from a fuel injected engine... Except I know nothing about your restricted hp engines. Perhaps they normally run rich? Our EPA wouldn't allow that.
Putting hotter plugs in a rich running engine is a cheesy way to stop the over rich mixture from fouling the plugs and stopping the engine.
Then again, is it wet carbon, or dry and fluffy? Wet would be oil fouling, also cheesily fixed with hotter plugs.

[yorkie_chris]

If it's FI international restriction kit they do run rich, chuck it in the bin.

[byron126]

The restriction kit was taken out a while ago and hasn't been used since, what I meant to say was that the thread of the spark plug had nasty black oil on it, im no mechanic so am not completely sure what this means, in terms of the restrictor kit it did have an FI washer kit in it but the engine ran terribly and loss of power when changing down meant from some interesting driving situations :L

[wideguy]

Nasty black stuff on the plug threads could just be some anti-seize compound, nothing to worry about in any case.
http://www.ngksparkplugs.com/tech_support/spark_plugs/faqs/faqread.asp
This is a good page to look at and compare.

[andrewsmith]

nope, really quite common!

Stand corrected