Great pic Alan.
Glad your one is sorted, Alan and hope you can sort your problems Andy. Might be worth whipping the inlet off just to make sure.
I saw a cheap endescope on ebay the other day, wonder if you could have a look at the bore.
Just googled it and found this, nice bike by the way.
http://www.youtube.com/watch?v=ee7Pr4XsDGw
Might shop if any water getting into number 4.
Or is this a bad idea, and wouldnt work???