Hey mate, thanks for the snappy reply :)
The original plugs (short ones) are the ones in the bike - it's an 04 model. I have some shiny new long ones though, if need be. I put them in to test them, IIRC they give me about 7mm from base to washer....but I don;t know if just whacking them in is an adequate solution?
Now, you say measure without the washer? But the service manual says "Measure the distance between the sealing washer and the cylinder head". If I screw in the plug far enough to just make contact with the tensioner, I'd say it's be *just* over 6mm from bolt head to cylinder.
But I was under the impression that I shouldn't have to screw the bolt in AT ALL to get contact with the tensioner (if the chains are in spec).