Oil Filler Assembly
This part replaces the stock "rubber stopper" on your Buell. Instead you get a screw-on cap and brass dipstick that can actually be read. The rim of the filler neck sticks up 3/8" which keeps dirt out of the oil tank and doesn't interfere with the seat.

OFA-01 Fits all pre XB series models except S2 models $62 (shown)
XBC-01 Fits XB-9 Firebolt $60
XBC-02 Fits XB-9 Firebolt (w/safey wire hole) $65 (shown)