It's quite a simple therapeutic job to strip the carb fully for cleaning. There are some tiny drilling that need checking (poking out) after the jet block is removed. We can give you tips on stripping it if you want to take that route? Ron

email (option): ronpier@talk21.com

Thanks Ron.
I need to make it a quick gentle clean and don't want to dismantle the carb as I don't have a spare gasket kit at the moment.
AFAIK, these seals are disposable and not reusable.

Well citric acid solution or vinegar can't be any more harmful than modern petrol, although I don't know what good it will do. Maybe better to use a small ultra sonic bath?

Apart from a couple of fiber washers for the banjo fitting, there is only one gasket/washer required No 25. Ron

email (option): ronpier@talk21.com

Hi Antuan
I think that vinegar or citric acid or any other acid will ruin your carburettor completely. Zinc dissolves in acid very easily. I use citric acid to take off old zinc plating and rust. Works very well. And I dissolve zinc in vinegar to make electroplating solution.

Assuming you are talking about an AMAL 276 as fitted to a BSA M20, I have rebuilt them many times and reused the gaskets. There are no actual gaskets, just fiber washers.

Any type of acid is gonna do bad things to the carb.