This hopefully shows the bits that are not quite right in the FuelMiser kit.
Bottom (green) gasket is the correct size for the grey motor BXOV1. The (grey) gaskets supplied in the FuelMiser kits are for the larger BX carbs.
(lookit all them leftover gaskets... a misspent youth overhauling BXOV1's
).
The plain steel pump arm is for the BXOV1, whilst the cad-plated ones supplied in the FuelMiser kits are for the later carbs. The difference is in the rectangular mounting hole - that cad plated hole is too large, and gives shaft slop. Normally the slop (from the round pump link hole being flogged out) is what you are trying to cure. The steel one shows a fair bit of slop.
(there is a pile of those cad-plated arms here too).
Cheers,
Harv