Years built: | 1973, 1974 (model years) |
Bikes produced: | ??? |
Price in 1973: | |
Vehicle Ident. # (VIN): | 6A |
Spark Plug: | HD No. 5-6, 14mm |
Gas Capacity: | 3.4 US Gallons |
Transmission: | 5-speed |
Carburetor: | Dell'Orto VHB 30AS |
Electrical System: | 12 Volt |
Saddle Height: | 31.5 inches |
Engine
Model designation letter: | SS-350 |
Type: | 4 Cycle OHV, Single Cylinder horizontal, 344 Cubic Centimeters |
Bore: | 2.913 inches |
Stroke: | 3.150 inches |
Piston displacement: | 21 Cubic Inches |
Compression ratio: | 9.3:1 |
Power Output: | 27 BHP @ 7000 RPM |
Lubrication system: | |
Starter system: | Primary kick and electric start |
Overall length: | 86.6 inches |
Handlebar width: | |
Ground clearance: | 7.5 inches |
Weight: | 355 lb |
Wheelbase: | 56.1 inches |
Saddle Height: | 31.5 inches |
Seats: | 2 persons |
Front suspension: | telescopic, oil damped |
Rear suspension: | twin shocks |
Fuel tank: | 3.4 Gallons Capacity including Reserve; Reserve is 1.6 quarts |
Transmission: | 2.6 quarts (2.86 liters) |
Front fork: | 30mm diameter - 54mm length (fork tubes) |
Transmission System
Clutch: | 5-Speed |
Gear ratios: | |
Gearshift pattern: | left side, 1 down - 4 up |
Wheels and Brakes
Front wheel tire: | 3.25 x 19 |
Rear wheel tire: | 3.50 x 18 |
Front brake: | Drum, internal expanding, double leading shoe type |
Rear brake: | Drum, internal expanding, single leading shoe type |
Rims: | 1.85 x |
Tire pressure (Front): | 18 PSI |
Tire pressure (Rear): | 22 PSI (solo); 28 (with passenger) |
I took out the 1973/1974 SS-350 Sprints on an own page, as there where several changes, which made the bike look different from earlier SS-350 Sprints which also have the same model designation and VIN. This is also the only production Aermacchi ever equipped with an electric start motor which easily started the 344cc engine but was as easily destroyed by engine backfire. The bike was fitted with a 12V 18Ah battery. Because of the new (frame) design and the electric start motor a the bike was a few kilogramms heavier than earlier Sprints. Between the 1973 and 1974 models they made only slight modifications like changing the decals on the gas tank. Late ' 74 models also had a new clutch system. The 1974 SS-350 is the last year of the Aermacchi 4-Stroke Bikes and the end of an era. After that, there were only 2-Stroke bikes available from Aermacchi. |
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