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1972 - 1973 Z1 900 Candy Orange & Candy Yellow (Jaffa & Lemon)
Frame: Z1F-00001 to Z1F-19999
Engine: Z1E-00001 to Z1E-19999
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First 5000 frame numbers considered 1972 model(worth more money) 
raised section where engine number is stamped is shorter than later model 

28mm carbs 
17mm drain in bottom of float bowl 
Single disc 
Black engine 
Speedometer in  MPH 
Mufflers have no stampings on them 
Chain oil tank under left hand sidecover


1974 Z1A 900 Candy Brown/Orange & Candy Green/Yellow (Red Tiger & Yellow Tiger)
Frame: Z1F-20001 to Z1F-47499
Engine: Z1E-20001 to Z1E-47497
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28mm carbs 
Single disc 
Silver engine 
Lines on tail piece go straight back 
Speedometer in  MPH or KM/H
Chain oil tank under left hand sidecover


1975 Z1B 900 Candy Super Red & Candy Super Blue 
Frame: Z1F-47500 to Z1F-85648
Engine: Z1E-47500 to Z1F-85847
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28mm carbs 
Single disc 
Silver engine 

KM/H Speedo
Brake light in tachometer 
Lines on tail piece  curve upwards 
No oil tank

1976 Z900A4 Diamond Dark Green & Diamond Brown
Frame: Z1F-085701 to Z1F-117060
Engine: Z1E-086001 to Z1F-138846                                                          Click Here to Shop This Model
1976 KZ900A4 American Import Diamond Dark Green & Diamond Brown
Frame: Z1F-500001 to Z1F-510340
Engine: Z1E-086001 to Z1F-138846

Z900A4
26mm carbs 
Twin disc 
Silver engine 

KM/H Speedo
No reflectors on forks 
No reflectors on rear shocks 
New Frame (thicker tubing), 
Tailpiece-Ducktail different shape 
New fuel tank(seam on outside of tank) ,speedo & tacho, seat 
New seat lock type ,sidecovers 
Square tailight 
New airbox and instrument panel
KZ900 Differences (american)
Single Disc
KZ Side cover badges
MPH Speedo

1977 Z1000A1 Diamond Wine Red & Diamond Sky Blue
Frame: KZT00A-000001 to KZT00A-027500
Engine: KZT00AE-000001 to KZT00AE-042500
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1978 Z1000A2 Luminous Red & Luminous Green
Frame: KZT00A-027501 to KZT00A-038427
Engine: KZT00AE-042501 to KZT00AE-081565
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1978 Z1R D1 Metallic Stardust Silver
Frame: KZT00D-000001 to KZT00D-017500
Engine: KZT00DE-000001 to KZT00DE-017500
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1980 Z1R D3 Ebony (Black)
Frame: KZT00D-017801 on
Engine: KZT00DE-017616 on
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