Water in the fuel tank ? Make sure the water drain hole (from under filler cap to rubber pipe on rear of fuel tank) is clear. The fuel filler cap seal is supplied bonded to a plated steel dished plate and is a direct swap for the original part. When the filler cap is closed this seals against the fuel tank filler neck and is supplied with no springs, original parts are required to be reused. The third and forth pictures on this listing are of a complete filler cap just to show where the seal fits. This listing is not for a complete filler cap !
Fuel filler cap metal bonded seal fits 750/900 Trident. 750/900 Speed Triple, 900/1200 Trophy, Tiger 900 (carb), Trident Sprint, Sprint 900, Sprint Sport, Sprint Executive, Super III and 750/900/1000/1200 Daytona.