if it is open could a blocked fuel filter cause issues - not sure what would block it up so bad?
I've now bypassed the fuel filter and fired it up with the same problems. It's quite dirty so I'm going to replace it anyway but it isn't the cause of the problem. The fuel pump also appears to be working fine.When I took the carbs off though there was some quite salty deposits around the insides of the carb rubbers.<img src="http://foc-u.co.uk/MGalleryItem.php?id=2534" alt="" />
Thanks for the reply unfazed. I think I've found my problem. There is a white goo in every float tray that's clogging the jets.I think once these are all cleaned out it might work again!!