Your search for "Monster 1200 821" revealed the following:
CFD105/D08 - HYPERSTRADA 821 ADJ. CARTRIDGE KIT
$649.7520mm diameter pistons. Adjustable in compression and extension. Preload of springs Nb. The kit does not include the oil.
CNC RACING | Fuel tank cap - Fast Key plug
$92.09Quick release cap with key for CNC Racing fuel tank flangesDesigned for those who seek maximum practicality without compromising on...