1975 Kawasaki Z1 900 Z1B value – Specs & Current price guide
1975 Kawasaki Z1 900 Z1B Frame & Engine Numbers
Frame Numbers (VIN Range):
Z1F-47500 to Z1F-85700
Engine Numbers:
Z1E 047500 to Z1E 085850
For buyers and sellers verifying authenticity, this is the correct official serial number range for the 1975 Z1 900 VIN
The 1975 Kawasaki Z1B 900 began production in May 1974 and ended production June 1975 with the introduction of the KZ900.
This serial number range is important when verifying that a Kawasaki Z-1 motorcycle retains its original matching frame and engine numbers, which can significantly impact its collector value, resale price, and overall market worth. On genuine factory-produced motorcycles, engine numbers are typically within approximately 250 units of the corresponding frame serial number.
Frame Numbers (VIN Range):
Z1F-47500 to Z1F-85700
Engine Numbers:
Z1E 047500 to Z1E 085850
For buyers and sellers verifying authenticity, this is the correct official serial number range for the 1975 Z1 900 VIN
The 1975 Kawasaki Z1B 900 began production in May 1974 and ended production June 1975 with the introduction of the KZ900.
This serial number range is important when verifying that a Kawasaki Z-1 motorcycle retains its original matching frame and engine numbers, which can significantly impact its collector value, resale price, and overall market worth. On genuine factory-produced motorcycles, engine numbers are typically within approximately 250 units of the corresponding frame serial number.
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All 1975 Kawasaki Z1 engine number stamps share the same factory style and format, making originality and correct font characteristics important when verifying authenticity.
The Z1B was produced with two variations of frame identification stickers. One version used the same style label as the earlier Z1A model, while the second featured a slightly larger, bolder font. Although the visual appearance differed, the printed information on both frame stickers was identical.
The Z1B was produced with two variations of frame identification stickers. One version used the same style label as the earlier Z1A model, while the second featured a slightly larger, bolder font. Although the visual appearance differed, the printed information on both frame stickers was identical.
The 1975 Kawasaki Z1-B was offered in two color options:
Candytone Super Red or Candytone Sky Blue, both featuring black, gold, and white striping accents.
Candytone Super Red or Candytone Sky Blue, both featuring black, gold, and white striping accents.
For 1975, the Kawasaki Z1B featured larger side cover emblems, distinguishing it from earlier models
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On the 1975 Z1B, round clips were used to secure the side cover emblems, whereas the earlier Z1 model used rectangular clips. This detail helps collectors and buyers verify authenticity.
A first for the 1975 model featured an updated petcock, which was no longer painted black and prominently added the word “FUEL”. This change helps distinguish it from earlier Z-1 models.
The 1975 exhaust is marked KHI 900Z1 / 750 Z2 DGM13236S, a detail that helps collectors confirm the correct year exhaust.
The rear brake lining included a wear indicator with a decal showing the usable range, providing an easy way for owners to monitor drum brake wear.
The speedometer displays numbers in 10 mph increments, whereas the earlier Z1 and Z1A models used 20 mph increments. This distinctive detail helps collectors and buyers identify authentic Z1B instruments.
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
Choke Lever has a black cap with CHOKE & arrow highlighted in white
All Z1B carbs were marked 217 0
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The seat featured yellow exposed seat foam padding, a detail that distinguishes it from earlier Z1 and Z1A models
It did not use the drive chain oil lubrication system thanks to its new O-ring chain. However, the left side cover still features the hole for the drive chain oil tank dipstick, which this tank was never installed on the Z1B
The tail section document tray shows Safety checks and no longer the wiring diagram
Z1B has a Label Found on the bottom of the seat pan
Front and Rear Turn signal lenses have the raised letters K32714
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: 511 pounds Dry (no oil or gas).
Overall length 86.6", width 34.1", height 46.1"
Wheelbase 58.7" Ground Clearance 6.5"
Minimum Turning Radius 98.5"
Braking Distance 36ft @31mph
Engine Oil: SAE 10W40, 4.2 Qt capacity
Spark Plugs: NGK B-8ES
Fuel Tank Capacity: 4.2 gallons
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.
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: 511 pounds Dry (no oil or gas).
Overall length 86.6", width 34.1", height 46.1"
Wheelbase 58.7" Ground Clearance 6.5"
Minimum Turning Radius 98.5"
Braking Distance 36ft @31mph
Engine Oil: SAE 10W40, 4.2 Qt capacity
Spark Plugs: NGK B-8ES
Fuel Tank Capacity: 4.2 gallons
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.
COMMON MYTH ABOUT THE Z1
MYTH: They did not make many Z1 900's?
FACT: Kawasaki made 85,700, up to June 1975. Thats 85,700 Z1 900's, not including the 1976 KZ900.
If you think thats not a lot, Imagine finding $87,500 dollars in a bag on the side of the road. No matter how rich you are would you say "85,700 well that not much." and throw it back.
If you still think that’s not a lot, watch a Cowboys, Giants or Packers home game, picture every single person there including the players rode there on a Z1. Even then, Kawasaki still produced more Z1s than any NFL stadium parking lot could hold.
MYTH: They did not make many Z1 900's?
FACT: Kawasaki made 85,700, up to June 1975. Thats 85,700 Z1 900's, not including the 1976 KZ900.
If you think thats not a lot, Imagine finding $87,500 dollars in a bag on the side of the road. No matter how rich you are would you say "85,700 well that not much." and throw it back.
If you still think that’s not a lot, watch a Cowboys, Giants or Packers home game, picture every single person there including the players rode there on a Z1. Even then, Kawasaki still produced more Z1s than any NFL stadium parking lot could hold.
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/