Custom lathed out of 6061t aviation Aluminum.

This fuel cap is fully assembled and ready to fit on your bike. This version has a spun Satin Finish.

The Sides of the top cap are knurled for extra grip - the lower threaded part of the cap has a spring-bound valve system built-in 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.

FITS ALL YEARS BONNEVILLE THRUXTON, AMERICA, T100, SPEEDMASTER, SE, SCRAMBLER, BOBBER, STREET TWIN, STREET CUP, STREET SCRAMBLER, T120 : 2001-2018 Present - Fits both CARB and EFI bikes.

FITS ALL YEARS HARLEY DAVIDSON WITH SCREW DOWN CAP 1981-2018 PRESENT SPORTSTER, 48, IRON ETC