Aermacchi Chimera 175

data sheet:
Years built: 1956-1961
Bikes produced:
Price in 1956: 248.000 italian Lira
Vehicle Ident. # (VIN): 100001 an up
Spark Plug:
Gas Capacity:
Transmission:
Carburetor: Dell'Orto UB 22 BS 2
Electrical System: 6V/45W, LiMa Magneti Marelli, Battery 6V 7Ah
Saddle Height:

Engine

Model designation letter: 9.25 CV at 6500 1/min
Type: 4-Cycle OHV, Single Cylinder
Bore: 60
Stroke: 61
Piston displacement: 172.4 cc
Compression ratio: 7:1
Lubrication system:
Starter system: kick start, left side

Dimensions and Weight

Overall length:
Handlebar width:
Ground clearance:
Wheelbase: 1360 mm
Seats: two persons
Front suspension:
Rear suspension: central monoschock
Fuel tank:
Transmission: 4-Speed
Front fork:
Weight:122 kg

Transmission System:

Clutch: Wet
Gear ratios:
Gearshift pattern:

Wheels and Brakes

Front wheel tire: 2.50 x 17 R
Rear wheel tire: 2.75 x 17 S
Front brake:
Rear brake:
Rims (Front & Rear):
Tire pressure (Front):
Tire pressure (Rear):

The Chimera was the first production bike with the aircooled, horizontal single-cylinder four-stroke engine which Aermacchi is most famous for.The engine later was available as 250cc as well and it was the basis for the 350cc engine which continued until 1974 as well.

The Chimera was designed by Mario Revelli de Beaumont and constructed by Alfredo Bianchi as technical leader. It was presented on December 1st in 1956 at the Milan motorcycle show. They engine had 175cc and produced 10hp at about 6800 rpm.
The bike had a futuristic airstream look and was equipped with monoshock suspension. In their opinion the Chimera was the ideal motorcycle and the name "Chimera" represents that as it translates to "dream".

The Chimera however was not a success as people didn't like the look of the plastic panelling. The Chimera was also available as a 250cc version. However, the Chimera was very important as it marks the beginning of "The Aermacchi engine".


AERMACCHI WORLD Peet, Belgium AERMACCHI-WORLD Peet, Belgium AERMACCHI-WORLD
AERMACCHI-WORLD Chimera 175 AERMACCHI WORLD AERMACCHI WORLD

Do you have further information? E-Mail: webmaster@aermacchi-world.de
Thanks to Jos for the picture of his bike!

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