Jazzbutcher, in my 08 1125r I use NGK CR9EKB plugs ( £7.42p each from the Green Spark plug co. ) and have no issues, good starting/clean running. There is no need to rotate the engine to change plugs but it is tight doing them ! My bike had not had the plugs changed in TEN YEARS, so getting them undone was a pain...the previous owner managed 3200 ( 3K) miles in all that time ! It won`t take you long to do, so don`t worry about trying different plug types ( within the correct heat range.) and let me know if you need advice. I hope that helps, have fun and good luck ! Alastair.
Yeah been looking on you tube re getting the plugs out, does seem fiddly but easier than trying to rotate the engine no doubt.
I've got both a pair of NGK Iridum & the Brisk plugs so I'll use both over the next year or so anyway, once I've changed them I'll be more confident next time. Both are meant to be better than standard plugs, but we shall see.
Got all the parts ready to go now so can set a really good maintenance re-start point, so just waiting till the end of Jan (Tax) & I'll get on with it, in the meantime there are rides to be had ha ha.