CB500/550 Carb Specs

Model YearCB500: 71-73CB550K 74-76CB550F 75-77CB550K3 #8211; 77CB550K3 #8211; 78CB500K3 #8211; 77
Carb setup #627B022A069AX46APD46C?
Keihin Carb Type111PDPDPD
Slow Jet#40#40#38#38#42#42
Main Jet#100#100#98#90#90#90
Jet Needle and Taper#2.52.515 #8211; 2°30', 4 grooves2.495-3°00', 2 groovesE2349F, 3rd groove?E2350F, 2nd groove
Needle Jet Air Bleeds?0.9 x 2 (1,2,3,4,5)0.7 x 2 (1,2,3,4,5)???
Air Screw Opening1 +/- 1/81-1/2 +/- 3/8 taper 121-1/2 +/- 1/2 taper 18NANANA
Pilot Screw Opening21 1/21 1/2
Air Jet#150??#130?#120
Slow Air Jet#150?#150
Float Height (metric)22mm22mm22mm14.5mm12.5mm14.5mm
Float Height (english) 0.89in 0.89in 0.89in 0.57in0.49in 0.57in