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{{Infobox Motorcycle
{{DISPLAYTITLE:{{PAGENAME}}: review, history, specs}}
{{Motorcycle
|name            = Kawasaki Z1
|name            = Kawasaki Z1
|image           =  
|photo           = Z1.jpg
|aka              = Z1, Z900, KZ900
|aka              = Z1, Z900, KZ900, Z1A, Z1B
|manufacturer    = [[Kawasaki]]
|manufacturer    = Kawasaki
|parent_company  =  
|parent_company  =  
|production      = 73-75
|production      = 1973 - 1975
|model_year      =  
|model_year      =  
|predecessor      =  
|predecessor      =  
|successor        = [[Kawasaki KZ900A]]
|successor        = [[Kawasaki KZ900A]]
|class            =  
|class            = Superbike
|engine          = 903cc [[air-cooled]] [[DOHC]] [[inline-four]]  
|engine          = 903cc [[air-cooled]] [[DOHC]] [[inline-four]] 2 valves per cylinder
|bore_stroke      = 66 x 66mm
|bore_stroke      = 66 x 66mm
|compression      = 8.5:1
|compression      = 8.5:1
|top_speed        = 130mph
|top_speed        = 130mph
|power            = 82 HP @8,500 rpm
|power            = 81.94 HP (61.1 KW) @ 8500RPM
|torque          =  
|torque          = 53.84 ft/lbs (73.0 Nm) @ 7000RPM
|fuel_system = 4x [[Mikuni]] VM 28mm [[carburetors]]
|fuel_system = 4x [[Mikuni]] VM 28mm [[carburetors]]
|ignition        =  
|ignition        =  
|spark_plug      = {{sparkplug|B8ES}} 73-75
|spark_plug      = {{sparkplug|NGK B8ES}} 73-75
|battery          = {{battery|12N14-3A}} 73-75
|battery          = {{battery|YUASA 12N14-3A}} 73-75
|transmission    = 5-Speed Return Shift
|transmission    = 5-Speed Return Shift
|final_drive= {{chain|630x92}}
|front_sprocket= 15T
|rear_sprocket= 35T
|frame            = tubular steel, [[double cradle]]
|frame            = tubular steel, [[double cradle]]
|suspension      = Front: [[telescopic forks]] <br /> Rear: [[swingarm]] / twin shocks
|suspension      =Front: 36mm Telescopic forks <br>
|brakes          =  
Rear: Dual shock, 5-way preload adjustment
|brakes          =Front: Single 296mm disc 2 [[piston]] [[caliper]] <br>Rear: 200mm drum
|front_tire      = {{tire|3.25-19}} 73-75
|front_tire      = {{tire|3.25-19}} 73-75
|rear_tire    = {{tire|4.00-18}} 73-75
|rear_tire    = {{tire|4.00-18}} 73-75
|rake_trail      =  
|rake_trail      =  
|wheelbase        =  
|wheelbase        = 1498.6 mm / 59.0 in
|length          =  
|length          =  
|width            =  
|width            =  
|height          =  
|height          =  
|seat_height      =  
|seat_height      = 812.8 mm / 32.0 in.
|dry_weight      =  
|dry_weight      = 230 kg / 507 lbs
|wet_weight      =  
|wet_weight      = 247.6 lbs / 546 lbs
|fuel_capacity    =  
|fuel_capacity    = 18 Liters / 4.7 gal
|oil_capacity    =  
|oil_capacity    =  
|oil_filter      = K&N KN-401
|recommended_oil= K-tech 10W-40
|fuel_consumption = 45 mpg (average)
|fuel_consumption = 45 mpg (average)
|turning_radius  =  
|turning_radius  =  
|related          = [[Kawasaki KZ900A]] <br />[[Kawasaki KZ1000A]]
|related          = [[Kawasaki KZ900A]] <br />[[Kawasaki KZ1000A]]<br />[[Kawasaki Police Motorcycles]]
|competition      = [[Honda CB750K]] <br />[[Triumph Trident]] <br />[[Suzuki GT750]]
|competition      = [[Honda CB750K]] <br />[[Triumph Trident]] <br />[[Suzuki GT750]]
}}
}}
The '''[[Kawasaki]] Z1''' was a Air cooled, four stroke, transverse four cylinder, DOHC, 2 valves per cylinder [[superbike]] [[motorcycle]] produced by [[Kawasaki]] from 1973 to 1975. Max [[torque]] was 53.84 ft/lbs (73.0 Nm) @ 7000 RPM. Claimed [[horsepower]] was 81.94 HP (61.1 KW) @ 8500 RPM. 


The '''Kawasaki Z1''' is a high performance [[superbike]] [[motorcycle]] produced by [[Kawasaki]] from 1973 to 1975. 


==Intro==
==Intro==


[[Kawasaki]]'s earlier two and three-cylinder bikes such as the [[Kawasaki H1|H1]], and [[Kawasaki H2|H2]] had bestowed Kawasaki with a high performance image.  But these bikes had known problems: excessive fuel consumption, noise, vibration, and less than perfect handling.  Their sparse comfort relegated them to the role of street racer.  Kawasaki engineers had outlined these limitations of their two-stroke triples as early as 1967.  This led to the beginning stages of planning a four-stroke super cruiser in the mold of the 1000cc Vincent, that could be ridden in any situation, and would be "THE" bike all experienced riders lusted after.   
[[Kawasaki]]'s earlier two and three-cylinder bikes such as the [[Kawasaki H1|H1]], and [[Kawasaki H2|H2]] had bestowed Kawasaki with a high performance image.  But these bikes had known problems: excessive fuel consumption, noise, vibration, and less than perfect handling.  Their sparse comfort relegated them to the role of street racer.  Kawasaki engineers had outlined these limitations of their two-stroke triples as early as 1967.  This led to the beginning stages of planning a four-stroke super cruiser in the mold of the [[Vincent Black Shadow|1000cc Vincent]], that could be ridden in any situation, and would be "THE" bike all experienced riders lusted after.   


==New York Steak==
==New York Steak==
Line 52: Line 60:
==Reception==
==Reception==
The Z1 became the "King of the Road" and an industry leader; as the first production motorcycle to bring such high performance and prestige to the general public.  ''[[Cycle magazine|Cycle Magazine]]'' recorded a standing quarter mile time of 12.83 seconds @ 101.7 mph.
The Z1 became the "King of the Road" and an industry leader; as the first production motorcycle to bring such high performance and prestige to the general public.  ''[[Cycle magazine|Cycle Magazine]]'' recorded a standing quarter mile time of 12.83 seconds @ 101.7 mph.
== Impact on the industry ==
All other manufacturers had to change their mindset to keep up with popularity of this motorcycle. By the end of the decade all Japanese manufacturers had developed machines to rival the Z1 which were almost direct clones of its engine configuration and integral body panels.
These bike wars directly lead to the demise of the flagging BrItish motorcycle industry.The American motorcycle industry (mainly Harley-Davidson) was also on its last legs and was only saved by radical restructuring and inventive financing.
== Design changes ==
The basic design of the Z1 remained relatively unchanged until the early 1980s with the exception of increased engine displacement (1015cc). This model is also the basis for the motorcycle used by most police forces across the United States to this day.
== Discontinuation ==
Only recently (2005) did Kawasaki announce that it would discontinue production of the police model, 25 years after the production on the consumer model and 32 years after its introduction.
==Engine==
A 63.5mm [[bore]] x 63.5mm [[stroke]] result in a [[displacement]] of just 903.0 cubic centimeters. 
==Drive==
The bike has a 5 Speed transmission. 
==Chassis==
It came with a 3.25-19 front [[tire]] and a 4.00-18 rear tire. Stopping was achieved via Single disc in the front and a Drum in the rear. The front suspension was a  Telescopic forks while the rear was equipped with a Dual shocks. 


==1973 Z1==
==1973 Z1==
[[Image:1973-kawasaki-z1.jpg|left|thumb|1973 Kawasaki Z1 900]]
<gallery mode='packed-hover'>
File:1973-kawasaki-z1.jpg|left|thumb|1973 Kawasaki Z1 900
File:1973-Kawasaki-Z1-Candy-Brown-5427-0.jpg|left|thumb|1973 Kawasaki Z1 in Candy Brown
File:1973-Kawasaki-Z1-Candy-Brown-5427-1.jpg|left|thumb|1973 Kawasaki Z1 in Candy Brown
File:1973-Kawasaki-Z1-Candy-Brown-5427-2.jpg|left|thumb|1973 Kawasaki Z1 in Candy Brown


[[Image:1973-Kawasaki-Z1-Candy-Brown-5427-0.jpg|left|thumb|1973 Kawasaki Z1 in Candy Brown]][[Image:1973-Kawasaki-Z1-Candy-Brown-5427-1.jpg|left|thumb|1973 Kawasaki Z1 in Candy Brown]][[Image:1973-Kawasaki-Z1-Candy-Brown-5427-2.jpg|left|thumb|1973 Kawasaki Z1 in Candy Brown]]
</gallery>
<br style="clear: left"/>


*Color  
*Color  
**Fuel Tank: Candy Yellow, Candy Brown
**Fuel Tank: Candy Yellow/Green, Candy Orange/Brown (UK & Europe); Candy Orange/Brown (US)
**Front Fender: Chrome  
**Front Fender: Chrome  
*Engine No.: Z1E000001-  
*Engine No.: Z1E000001-  
*Frame No.: ZIF-000001-  
*Frame No.: Z1F-000001-  
*Parts Catalog No.: 99997-603, (E) 99997-608S
*Parts Catalog No.: 99997-603, (E) 99997-608S
*Owner's Manual No. : 99997-800
*Owner's Manual No. : 99997-800
Line 71: Line 105:


==1974 Z1A==
==1974 Z1A==
[[Image:1974-kawasaki-z1a.jpg|left|thumb|1974 Kawasaki Z1A 900]]
<gallery mode='packed-hover'>
[[Image:1974-Kawasaki-Z1A-Maroon-0.jpg|left|thumb|1974 Kawasaki Z1A in Maroon]]
File:1974-kawasaki-z1a.jpg|left|thumb|1974 Kawasaki Z1A 900
[[Image:1974-Kawasaki-Z1A-900-Brown-0.jpg|left|thumb|1974 Kawasaki Z1A in Brown]]
File:1974-Kawasaki-Z1A-Maroon-0.jpg|left|thumb|1974 Kawasaki Z1A in Maroon
[[Image:1974-Kawasaki-Z1A-900-Brown-1.jpg|left|thumb|1974 Kawasaki Z1A in Brown]]
File:1974-Kawasaki-Z1A-900-Brown-0.jpg|left|thumb|1974 Kawasaki Z1A in Brown
<br style="clear: left"/>
File:1974-Kawasaki-Z1A-900-Brown-1.jpg|left|thumb|1974 Kawasaki Z1A in Brown
</gallery>
 
 
*Color
*Color
**Fuel Tank: Candy Orange
**Fuel Tank: Candy Tone Brown/Orange, Candy Tone Yellow/Green
**Front Fender: Candy Yellow
**Front Fender: Chrome
*Engine No.: Z1E020001-
*Engine No.: Z1E020001-
*Frame No.: Z1F-020001-
*Frame No.: Z1F-020001-
Line 85: Line 122:
*Shop Manual No.: 99997-700
*Shop Manual No.: 99997-700


For 1974 Kawasaki changed the colors and markings, and the engine dropped the black paint to simply be an aluminum color. In mid 1974 there was a slight [[carburetor]] change to improve cold running.  At the end of 1974 Kawasaki had produced over 80,000 units of the Z1 and [[Kawasaki Z2|Z2]].
Major changes for this model were the silver engine finish, redesigned tank
and tailpiece markings and a stop lamp failure light in the tachometer. The
idiot light cover was also changed, the warning lights were now placed in a
different order. In mid 1974 there was a slight [[carburetor]] change to improve cold running.  At the end of 1974 Kawasaki had produced over 80,000 units of the Z1 and [[Kawasaki Z2|Z2]]. The best gets better.


==1975 Z1B==
==1975 Z1B==
[[Image:1975-kawasaki-z1b.jpg|left|thumb|1975 Kawasaki Z1B 900]][[Image:1975-Kawasaki-Z1-Brown-0.jpg|left|thumb|1975 Kawasaki Z1 900 in Brown]][[Image:1975-Kawasaki-Z1-Brown-1.jpg|left|thumb|1975 Kawasaki Z1 900 in Brown]][[Image:1975-Kawasaki-Z1-Brown-2.jpg|left|thumb|1975 Kawasaki Z1 900 in Brown]][[Image:1975-Kawasaki-Z1-Brown-3.jpg|left|thumb|1975 Kawasaki Z1 900 in Brown]][[Image:1975-Kawasaki-Z1-Blue-7762-0.jpg|left|thumb|1975 Kawasaki Z1 in Blue]][[Image:1975-Kawasaki-Z1-Blue-7762-1.jpg|left|thumb|1975 Kawasaki Z1 in Blue]][[Image:1975-Kawasaki-Z1-Blue-7762-2.jpg|left|thumb|1975 Kawasaki Z1 in Blue]][[Image:1975-Kawasaki-Z1-Blue-7762-3.jpg|left|thumb|1975 Kawasaki Z1 in Blue]]
<gallery mode="packed-hover">
<br style="clear: left"/>
Image:1975-kawasaki-z1b.jpg|1975 Kawasaki Z1B 900
Image:1975-Kawasaki-Z1-Brown-0.jpg|1975 Kawasaki Z1 900 in Brown
Image:1975-Kawasaki-Z1-Brown-1.jpg|l1975 Kawasaki Z1 900 in Brown
Image:1975-Kawasaki-Z1-Brown-2.jpg|1975 Kawasaki Z1 900 in Brown
Image:1975-Kawasaki-Z1-Brown-3.jpg|l1975 Kawasaki Z1 900 in Brown
Image:1975-Kawasaki-Z1-Blue-7762-0.jpg|1975 Kawasaki Z1 in Blue
Image:1975-Kawasaki-Z1-Blue-7762-1.jpg|1975 Kawasaki Z1 in Blue
Image:1975-Kawasaki-Z1-Blue-7762-2.jpg|1975 Kawasaki Z1 in Blue
Image:1975-Kawasaki-Z1-Blue-7762-3.jpg|1975 Kawasaki Z1 in Blue
</gallery>


*Color
*Color
Line 96: Line 145:
*Engine No.: Z1E047500-
*Engine No.: Z1E047500-
*Frame No.: Z1F-047500-
*Frame No.: Z1F-047500-
*Parts Catalogue No.: 99997-627-50S, (E) 99997-627-51S
*Parts Catalog No.: 99997-627-50S, (E) 99997-627-51S
*Owner's Manual No.: 99997-832
*Owner's Manual No.: 99997-832
*Shop Manual No.: 99997-700
*Shop Manual No.: 99997-700
*Major Changes: Color and marking. Special chain provided with sealed-in grease. Automatic chain oiler discontinued.
*Major Changes: Color and marking. Special chain provided with sealed-in grease. Automatic chain oiler discontinued.


Kawasaki dropped the automatic chain oiler in favor of an o-ring chain.  The front forks received revised dampers and softer springs.  To improve low speed running there was a new automatic ignition advance.  Unlike on the trend with the H1 these changes didn't drop performance.
 
 
Kawasaki dropped the automatic chain oiler in favor of an o-ring chain.  The paintwork and markings were changed including larger side panel badges.  The switchgear was slightly cosmetically changed and the Speedo was now in 10-mph increments. The fuel tap was changed from black to silver and the carbs were modified to improve performance.  The front forks received revised dampers and softer springs.  To improve low speed running there was a new automatic ignition advance.  Unlike on the trend with the [[Kawasaki H1|H1]] these changes didn't drop performance.


==1976 Z1==
==1976 Z1==
Line 107: Line 158:




==Specifications==
{|  class="wikitable"
|-
!Make Model
|Kawasaki Z1-A
|-
!Year
|1974
|-
!Engine Type
|Four stroke, transverse four cylinder, DOHC, 2 valve per cylinder.
|-
!Displacement
|903 cc / 55.1 cu-in
|-
!Bore X Stroke
|66 x 66 mm
|-
!Cooling System
|Air cooled
|-
!Compression
|8.5:1
|-
!Lubrication
|Wet sump, trachoid pump
|-
!Air Filtration
|Treated synthetic fiber
|-
!Induction
|4 x 28mm Mikuni VM28SC
|-
!Ignition
|Battery and coil
|-
!Starting
|Electric & kick
|-
!Max Power
|82 hp / 59.8 kW @ 8500 rpm
|-
!Max Torque
|73.5 Nm / 54.3 lb-ft @ 7000 rpm
|-
!Clutch
|Wet, multi-plate
|-
!Transmission
|5 Speed
|-
!Final Drive
|Chain
|-
!Primary Drive
|Straight cut gears
|-
!Gear Ratio
|1st 12.79:1 2nd 8.84:1 3rd 6.74:1 4th 5.58:1 5th 4.92:1
|-
!Frame
|Double tubular steel cradle
|-
!Front Suspension
|36mm Telescopic forks
|-
!Rear Suspension
|Dual shock, 5-way preload adjustment
|-
!Front Brakes
|Single 296mm disc 2 piston caliper
|-
!Rear Brakes
|200mm drum
|-
!Front Tire
|3.25 H19
|-
!Rear Tire
|4.00 S18
|-
!Rake
|27º
|-
!Trail
|3.75 in.
|-
!Dimensions
|Length 2209.8 mm / 87.0 in.
|-
!Wheelbase
|1498.6 mm / 59.0 in
|-
!Handlebar Width
|818 mm / 32.2 in.
|-
!Seat Height
|812.8 mm / 32.0 in.
|-
!Ground Clearance
|170 mm / 6.75 in.
|-
!Dry Weight
|230 kg / 507 lbs
|-
!Wet Weight
|247.6 lbs / 546 lbs
|-
!Fuel Capacity
|18 Liters / 4.7 gal
|-
!Consumption Average
|48 mpg
|-
!Braking Distance 30 Mph - 0
|29.00 ft.
|-
!Braking Distance 60 Mph - 0
|126.00 ft.
|-
!Acceleration 0-30 Mph
|2.7 sec
|-
!Acceleration 0-60 Mph
|4.8 sec
|-
!Standing ¼ Mile
|12.3 sec / 112 mph
|-
!Top Speed
|135 mph
|}
==In Media==
* [https://motopixel.org/pixel/foxes#kawasaki-z1 Foxes]
== External Links ==
* http://www.motoretroillustrated.com/archive_kawasaski_z1.htm


{{motorcycle-stub}}
{{motorcycle-stub}}
{{Kawasaki}}
{{Kawasaki}}


[[Category:Kawasaki motorcycles]]
[[Category:Kawasaki motorcycles|Z1]]
[[Category:1970s motorcycles]]
[[Category:1970s motorcycles]]
[[Category:Road motorcycles]]
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