Custom lathed out of aviation grade 6061t Aluminium.

This sale is for the complete new cap fully assembled and ready to fit on your bike.

Sides of the top cap knurled for extra grip - the lowest threaded part of the cap has a spring-bound valve system centrally located in the middle of the bung.

This connects to 3 vents in the top part of the cap to allow alleviation of any pressure that may build up inside the tank.

It also comes with a petrol-resistant o-ring seal that sits on the top of the thread.

Some models it will fit include Bonneville, T100, America, Speedmaster, Thruxton. It will also fit on all post-1983 Harleys with a regular right-hand thread

FITS ALL YEARS BONNEVILLE THRUXTON AMERICA T100 SPEEDMASTER SE SCRAMBLER: 2001-2015 Present - Fits both CARB and EFI bikes.