Solex carburettor gasket set to suit Model 26WH2 as fitted to Triumph TRW. These gaskets are direct copies of the gaskets found in an original unmolested 26 WH2 carburettor. Replacing them has the bike running perfectly. How can a carburettor hold fuel without gaskets? The rotary valve has a spring to ensure a tight fit and the gaskets do not affect the rotary valve seal.