1532832_1

Kelly Leak 1974 HD Aeromachi Bike Specs

Engine and drivetrain 
    • Engine: 89cc, two-stroke, single-cylinder, air-cooled
    • Horsepower: 8 HP
    • Transmission: 4-speed manual, foot-shifted
    • Clutch: Manual
    • Drivetrain: Rear-wheel drive (RWD)
    • Lubrication: Metered oil injection 

Chassis and suspension 
    • Frame: Steel backbone frame
    • Front suspension: Telescopic front fork
  • Rear suspension: Swing arm with dual coil springs
  • Brakes: Drum brakes on front and rear wheels
  • Wheels: 17-inch chrome wire wheels in the front and 16-inch in the rear (on some models) 
Dimensions and features 
    • Bore and stroke:
      48 mm×50 mm 48 mm cross 50 mm
      48 mm×50 mm

    • Compression ratio: 9.22:1
    • Lights: Headlight and taillight
    • Instrumentation: Speedometer
    • Other features: Turn signals and folding handlebars with full-size grips 

 

Builder
Thomas Syjndergaard
Paint
Gordon Orliff
Screenshot 2025-10-31 at 2.38.16 AM
Screenshot 2025-10-31 at 2.36.53 AM
The specific Kelly Leak Z90 Harley-Davidson Aermacchi is likely a restored or modified replica, as the original bikes are rare and the one from The Bad News Bears was a prop. While the exact fate of the movie prop is unknown, Harley-Davidson made the Z90 in the mid-1970s through its partnership with Italian manufacturer Aermacchi.
Screenshot 2025-10-31 at 2.38.41 AM
  • The original bike: The Z90 was a small-displacement motorcycle produced by Harley-Davidson between 1973 and 1975, as part of a series of bikes made in collaboration with Aermacchi in Italy.
  • The movie prop: The Z90 is best known as the bike ridden by the character Kelly Leak in the 1976 film The Bad News Bears. It's unlikely this specific prop exists today as a complete, original vehicle, but it's possible a restored or modified version could be mistaken for the original.
  • The fate of movie props: While the exact fate of the prop bike is unknown, it's common for movie props to be sold, modified, or lost over time. It's possible that the original bike was sold and modified by an individual or that it was lost or destroyed
Screenshot 2025-05-19 at 11.26.52 AM
Screenshot 2025-05-19 at 10.52.00 AM
Screenshot 2025-10-31 at 2.38.41 AM