So, probably been asked before, but: On-line parts catalogue, owner's handbook and workshop manual say NGK MAR10A-J, but NGK say MAR9A-J. What's going on here....? Clearly they're different heat ranges or something. I don't really want to take one out of the engine just to see what's in there now.
All the DVT's run the MAR9 plugs. Only multistrada that run the 10's were the twin plug 2013/14 iirc.
