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1976 Kawasaki KZ900B

1994 Harley-Davidson FLHTCU

1996 Harley-Davidson FXSTS

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Carburetor Settings | Carb Basics (pdf) | Tuning Tips | KZ900 Factory Tune Up Specs | KZ900 Parts Manual

Classic Kawasaki
Mikuni Carburetors Settings

28mm VM28SC  Z1 & early Z1-A
 Main Jet  112.5
 Air Jet  1.0
 Needle Jet  P-8
 Jet Needle  5J9-3 - last number is the clip position where 1 is at the top of the needle (leanest) and 5 is at the bottom (richest)
 Throttle valve (slide)  2.5mm cutaway
 Pilot Jet  20.0
 Air Screw setting  1 1/2 turns out
   
 28mm (VM28SC) Late Z1-A & all Z1-B
 Main Jet  112.5
 Air Jet  1.0
 Needle Jet  O-8
 Jet Needle  5J9-2 (last number is the clip position)
 Throttle valve (slide)  1.5mm cutaway
 Pilot Jet  17.5
 Air Screw setting  1 1/4 turns out
   
 26mm (VM26SS) KZ900A4 & A5
 Main Jet  115
 Air Jet  1.0
 Needle Jet  O-6
 Jet Needle  5DL31-3 (last number is the clip position)
 Throttle valve (slide)  1.5mm cutaway
 Pilot Jet  17.5
 Air Screw setting  1 3/8 turns out
   
 29mm smoothbores  Z1 / KZ900 / KZ1000
 Main Jet  120
 Air Jet  0.9
 Needle Jet  O-6
 Jet Needle  5DL31-3
 Throttle valve (slide)  1.5mm cutaway
 Pilot Jet  17.5 or 20.0 (or 25 in the later versions)
 Air Screw setting  1 1/2 turns out
   
 29mm smoothbores  CB750
 Main Jet  115
 Air Jet  0.9
 Needle Jet  O-6
 Jet Needle  5DL31-3 (last number is the clip position)
 Throttle valve (slide)  1.5mm cutaway
 Pilot Jet  17.5 or 20.0 (or 25 in the later versions)
 Air Screw setting  1 1/2 turns out
   
 29mm smoothbores  KZ650
 Main Jet  105
 Air Jet  0.9
 Needle Jet  O-4
 Jet Needle  5DL31-3
 Throttle valve (slide)  1.5mm cutaway
 Pilot Jet  15
 Air Screw setting  1 1/2 turns out
   
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