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1975 Kawasaki Z1-B

1975 Z1B FRAME NUMBERS:  Z1F-47500 To Z1F-85700
1975 Z1B ​ENGINE NUMBERS: Z1E 047500 To Z1E 085850

Production Began May 1974
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All Z1B engine number stamps look the same.
The Z1B had two variations of frame stickers:
One label the same style as the Z1A, another featuring a slightly larger, bolder font.
The information on both were identical.
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​2 Color options: Candytone Super Red or Candytone Sky Blue. Both w/black, gold & white strips​
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Side cover emblems were larger for 1975
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Round clips were used to hold emblems on the Z1B side covers, Z1 used rectangular

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Petcock was changed, noticeably adding the word FUEL and no longer painted black.

Exhaust Marked KHI 900Z1/750 Z2 DGM13236S
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Rear brake lining had a wear indicator with a decal showing Usable Range
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Speedometer displays numbers in 10mph increments.
(Z1 & Z1A has 20mph increments)
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Carburetors were the redesigned Mikuni VM28SC 217 series 
Choke Lever has a black cap with CHOKE & arrow highlighted in white
​All Z1B carbs were marked 217 0
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Z1B has Yellow Seat foam padding
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The drive chain oil lubrication system was not needed with the new O-Ring chain, however the left side cover still has the hole for the drive chain oil tank dipstick that was never installed on the Z1B.
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The tail section document tray shows Safety checks and no longer the wiring diagram
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Z1B has a Label Found on the bottom of the seat pan
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Front and Rear Turn signal lenses have the raised letters K32714
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The black plastic chain guard was redesigned for the Z1B to allow for the wider o-chain

Front Fork Top Yolk (visible on the underside) has a golf ball style dimpled surface in the casting

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Ever wonder how long it took for a Z1 to go from the factory production line to sold off the showroom floor?
Here's a perfect example. Z1F-78308 was made in March 1975. 4 months later it was purchased new at the dealership July 18, 1975

On average, 3 to 4 months from production date to Kawasaki dealership showrooms, to consumer.
Not bad considering 1975 logistics, it was crated and shipped from Tokyo to California via container ship, transported by delivery truck to a dealership, assembled, tested, paperwork processed, etc.

Z1 Specs: 903cc Engine, 82hp. Top speed over 125mph. 1/4 mile: 12 seconds.
Weight 506 lbs. *Approximately 540 lbs gassed up and ready to go


The 1975 900 had a $2150 suggested retail price. On occasion, prices were slightly higher at dealerships in the eastern states compared to the west coast since they factor in transportation costs.

1973 Z-1 INFO
1974 Z1A INFO
SELL YOUR Z-1

​​If you have an estate to liquidate or non Kawasaki motorcycles here are websites that might be able to help you. https://www.weekendestatesales.com/  https://www.wantedoldmotorcycles.com/

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  • Home
  • Kawasaki Z1 900 Info
  • VIN Identification
  • Z1 Frame / Engine Number Location
  • 1973 Z1 900
  • 1974 Z1-A
  • 1975 Z1-B
  • 1976 KZ900
  • 1977 - 1980 KZ1000
  • Kawasaki H1 500
  • Kawasaki H2 750
  • Date Codes
  • S3 / KH400
  • How the Z1 Was Made
  • Replacement Frame Info
  • Contact Form
  • Kawasaki Z1 900 value guide
  • Sell Your Kawasaki
  • 1972 1973 S2 350
  • Z1 Buyers Guide
  • Z1 Genuine Parts
  • KZ1000 Z1R