Right now I am using a vented REDS bell. You will need about 2.5mm of spacers
between the flywheel and front bearing and then some 3x5 shims on the end
to make it all work. The Tekno bell does not require the flywheel to be shimmed
but as I remember it still needed some 3x5 shims for the front bearing if you had
it shimmed far enough forward to clear the flywheel.

NEW bells only with the BuKu. You never want to use a bell thats been run with
aluminum shoes.