The 85 F has a fibreglass belly pan as standard, the G/H don't.
The G/H belly pans kick out at the bottom towards the front wheel. The F just runs straight down.
The F mid section fairing has 3 bolts that hold it to the nose cone section, G/H have 2. The F also has 3 slots cut into it next to the Suzuki badge.
The nose cones are the same bar the 3/2 holes.