What Spark plugs for a 998 Testastretta
Can anyone recomend the best spark plug to use on the 998 Testastretta engine.
I am currently using the standard champions, a while a go I purchased some NGK iridium plugs but they do not engage on the plug spanner to well and I can see problems in the future with removing the horizontal cylinder plug if I fit them.
This morning I could not get the bike to start and ended up flatening the battery. I rode the bike back from work yesterday evening, so its not as if its been stood for a while.
I feel a new set of plugs will help and was wondering what other owners are using