Carburettor Type Mikuni BS36
Main Jet
All US, 1984 through 1987 UK 112.5
1988 and later UK 110
Main air jet 45
Jet needle (-clip position)
FJ1100 US 5FZ63-3
FJ1100 UK 5FZ62-3
FJ1200 US 5FZ72
FJ1200 UK 5FZ74-3
Needle Jet
FJ1100 Y-0
FJ1200 Y-2
Pilot air jet
FJ1100 160
FJ1200 110
Pilot jet
US 37.5
UK 1984 through 1990 40
1991 on 42.5Pilot screw
US Preset
UK 1984 through 1990 2 turns out
1991 on 3 turns out
Valve seat size
US 2.3
UK 1984 through 1987 2.3
1988 on 1.5
Starter jet 30
Float height 22.3mm ± 1.0mm (0.88in ± 0.04in)
Fuel level
FJ1100 3.0 ± 1.0mm (0.12in ± 0.04in)
FJ1200 2.5 - 3.5mm (0.098 - 0.138 in)
42,5