Hi
can someone help me out here, i have my mc18 up for sale on here, but at the moment she has decided that she would rather dump the fuel after a short run, i have changed the needle valves and floats and still lno good, could this be warn seats where the needle valve seats any views on this would help me out as i need to sell her but unable to with this problem.
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wheely2001

Could be a blocked tank or carb breather hose.

My MC28 did the same thing and that was the culprit.

contaminants in the fuel/carb. take the carbs apart and give them a good blasting with carb cleaner, especially where the needle is.

Clean the float valve seats with some brasso on a cotton bud in a drill.don't go mad tho!
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it wouldn't be fun if it was easy!

Thanks guys for your info, have now since found out that crank seals etc were worn, ended up with a complete engine rebuild, conrods were good but middle bearing seal shot which was allowing fuel to pass etc, all done now just needs running in, sounds brilliant and purrs like a kitty cat!!! But sadly she still has to be sold....not happy but too many toys, someone will now have a ready to ride rebuilt and restored mc18 which i will not get the joy of riding