Bear wrote: [QUOTE] I can't recall who told me this (a ukrm'er IIRC), but apparently on most variants of the XJS (and possibly XJ12 SIII), elements of the air con overhang the rearmost 2 plugs, meaning that, if you want to change said plugs you'll have to disassemble part of the air-con system. In practice this means that almost all V12s are running on 10 cylinders most of the time, since it's usually 100K miles or so since they were last changed :) [/QUOTE] Heh, that's silly. On my FZR I need to remove the radiator to change the plugs, which I thought was a little silly. [QUOTE] [QUOTE] I don't think I'd want to do anything else on that motor. Those V12 motors look lovely when painted up and polished, I saw one in a big bike[1] at a Swedish bike show.[/QUOTE] The lump itself is gorgeous, but tends (on the SIII XJ12s at least) to have *shitloads* of ancillaries cluttering up the engine bay. [/QUOTE] I had a book with a Jag V12 engined hotrod in it, like a T-bucket it was, lovely. [QUOTE] Then there's the mega-rare X300 V12 6.0 litre, which gives you all the modern toys, an older Jag look, smoooooth V12 motoring, and totally flies: [URL]http://www.jag-lovers.org/modern/models.htm#X300[/URL] [URL="http://www.jag-lovers.org"]www.jag-lovers.org[/URL] ... for all your Jag lusting needs :)[/QUOTE] Nice, but still a bit OTT for queuing in traffic jams. ;)