I made this detailed video to help people rebuild their Mikuni BST33 carburators, as found on BMW F650 Funduro and Strada (1993-2000), Aprilia Pegaso, Suzuki DR800, DR350.
00:00 Tools needed
01:17 Disassembly
14:56 Membrane check
17:19 Disassembly continued
20:21 Cleaning parts
33:59 T junction seal test
34:34 Assembly of mixture tubes, slides, needles and membranes
43:37 O-ring quality rant
44:20 Mixture screw assembly
49:28 Mixture screw adjustment
50:42 Idle and main jets
52:35 Float assembly
57:55 Float adjustment
1:01:43 Floatbowl gasket & butterfly valve check