Carb Settings and Notes for '77 Yamaha XS750D Triple
49 States
Mikuni Type BS34 (First Gen)
Carb ID 1J7 01
Main Jet - 145
Idle Jet - 17.5 (VM22/210)
Fuel Passage Plug - No
Jet Needle - 4H11-3
Needle Jet - Y2
Float Height - 26.5mm +- 1mm
Air Screw - 2.25 Turn
Carb Settings and Notes for '78-'79 Yamaha XS750E/F
49 States
Mikuni Type BS34 (Second Gen)
Carb ID 2F3 00
Main Jet - 130
Idle Jet - 42.5 (Bleed type)
Fuel Passage Plug - Yes
Jet Needle - 5XH6-3
Needle Jet - Y0
Float Height - 25.7mm +- 1mm
Air Screw - 2.25 Turn
Carb Settings and Notes for '78-'79 Yamaha XS750SE/SF Specials
49 States
Mikuni Type BS34 (Second Gen)
Carb ID 2G2 00
Main Jet - 130
Idle Jet - 42.5 (Bleed type)
Fuel Passage Plug - Yes
Jet Needle - 5XH6-3
Needle Jet - Y0
Float Height - 25.7mm +- 1mm
Air Screw - 2.25 Turn
Carb Settings and Notes for '80-'81 Yamaha XS850
49 States
Hitachi Type HSC34
Carb ID 3J2, 3J3, and 4H1
Main Jet - 142
Idle Jet - 40
Fuel Passage Plug - Yes
Jet Needle - Y01
Needle Jet - 2.6
Float Height - 12.5mm +- 1mm
Air Screw - 2.0 Turn