Hi Tech,
yeah, was time to get my tools out: 30cc of water in one cylinder and cross-talk (burnt gasket) between #3 and #5 cylinder. That possibly explains the weak compression on 3 and 5, #4 was the one full of water. Think I might get the heads fluxed, but I'll have to clean them first.

Just wondering about my engine in general, it's already bored .060 over, but the cylinder walls look OK, and judging by the compression being OK on the 5 other cylinders I guess it's still useable.

I'll get the heads cleaned tomorrow, there's a hole lot of carbon and gunk in them, guess I might play with my carb a bit, seems to be running rich...

Thanks in any case, I'll get in touch as soon as I know more...
Mad