What Octane?

[JMemonic]

How about a 1998 CB600 ? I've been running her on 91 but have just discovered the plugs are black and gritty.
I've only had her for a few months so I may have just bought an already dirty lemon.

Had a quick browse of the net seems that Honda recommends 87 octane or higher fuel so 91 would be fine, could be a number of factors for the condition of the plugs, you have mentioned in another post the air filter was in need of replacement, that could be part of the cause, when was it last serviced ? I am picking it was a long time ago if I read things right, change the plugs and filter then go from there, remembering that you can not get grey plugs now days, (without leaded fuel).

[stevewederell]

Cheers for that JMemonic,

Had some good advice in the maintenance evening thing too by lemans, so I'll change those things, keep using 91 and throw some Wynns cleaner in too.

Hope to get out of my cage soon, missed such a cracker day today!