VintageIndian Monza 2.5" Flip Top Petrol Fuel Tank Cap BSA Norton Triumph Cafe Racer Polished alloy Monza quick release fuel or oil cap Size: 2.5" monza fuel tank cap The cap shown can be used on many vintage bsa norton triumph bikes This is best suited for cafe racer tanks This is ideal for cafe racers, custom bikes, choppers, bobbers, street fighters and racing motorbikes.