Moto Guzzi normals
| Moto Guzzi | |
|---|---|
 Moto Guzzi Normale (1921-1924) |
|
| Normal | |
| Manufacturer | Moto Guzzi |
| Sales description | Normal |
| Production period | 1921 to 1924 |
| class | motorcycle |
| Motor data | |
| 1-cylinder 4-stroke | |
| Displacement (cm³) | 498.4 cc |
| Power (kW / PS ) | 5.9-6.3 kW |
| Top speed ( km / h) | 85 km / h |
| transmission | 3-speed |
| drive | Chain |
| Brakes | Drum (rear only) |
| Wheelbase (mm) | 1380 |
| Dimensions (L × W × H, mm): | 2100 × 870 × 920 |
| Empty weight (kg) | 130 |
| Previous model | Prototype GP |
| successor | Moto Guzzi Sport |
The Moto Guzzi Normale is the first production motorcycle from the Italian manufacturer Moto Guzzi . It was built from 1921 to 1924.
history
In 1920 Carlo Guzzi built a motorcycle with the financial support of his comrade Giorgio Parodi , which had a single-cylinder four-stroke engine with a horizontal cylinder installed in the tubular frame. Its four (!) Valves were controlled by an overhead camshaft . This prototype , painted in dark gray-green , was called GP (Guzzi & Parodi).
Based on this machine, the normal type was presented to the public in the following year . The cylinder head of this first series-production machine was designed more simply for reasons of cost: It only had two valves, which were controlled by a camshaft below .
In 1923, the further developed Sport was added to this first model . In 1924 the production of the normals ended.
technology
Engine and drive
The normal has an air-cooled single - cylinder four-stroke engine with a horizontal cylinder. On the left stump of the double-bearing crankshaft there is a smooth flywheel that runs outside the housing. A spur gear attached behind it drives the basket of the multi-plate oil bath clutch mounted on the transmission input shaft. The three-speed gearbox is operated with a gear lever on the right side of the tank. The transmission is connected to the rear wheel by a machine chain.
The hanging exhaust valve is controlled by the camshaft below via a bumper and a rocker arm , the vertical intake valve is controlled directly ( counter control ). To switch off the engine, the bumper is pushed forward using a valve lifter so that the exhaust valve opens. The magneto is driven by a spur gear on the right side of the engine. The ignition timing is adjusted manually.
The mixture is prepared by a flat-flow carburetor with a round slide, 36 mm passage and without an air filter. The nickel-plated exhaust pipe is pulled back on the left side of the machine.
Frame and chassis
The normal has a double-loop tubular / sheet metal frame with an unsprung mount for the rear wheel. The front wheel sits in a parallelogram fork with a barrel spring .
Tanks
The petrol tank, designed as a plug-in tank, has a volume of 10 liters, the oil tank underneath has a volume of 2.5 liters. The oil tank is connected to the cylinder head and the oil pump in the engine's dry sump by nickel-plated copper pipes.
Wheels and brakes
The 26 ″ wheels are wire-spoke wheels. The rear has half-hub drum brakes . It is operated via a foot lever on the left side of the engine and a linkage or via a cable from the handlebar.
Materials
The engine / gearbox housing is made of aluminum, the cylinder and cylinder head are made of gray cast iron . The frame, the front fork, the tank and the mudguards, on the other hand, are made of sheet steel.
Painting, surface treatment and emblems
The sheet steel parts of the normal are painted in olive green. Tanks and mudguards have gold-colored lines. On the tank sides of the machines there are gold-colored Moto Guzzi emblems as decals. The gray cast iron parts of the engine are burnished.
Technical specifications
| Type | Normal |
| Construction period | 1921-1924 |
| Displacement | 498.4 cc |
| Bore × stroke | 88 mm × 82 mm |
| compression | 4.0: 1 |
| power | 8.0-8.5 PS (5.9-6.3 kW) |
| at speed | 3400 rpm. |
| transmission | 3-speed |
| wheelbase | 1380 mm |
| Dimensions (L × W × H) | 2100 mm × 870 mm × 920 mm |
| Empty weight | 130 kg |
| Front / rear tires | 3.00 ″ × 26 ″ / 3.00 ″ × 26 ″ |
| Top speed | 85 km / h |
| Fuel consumption | approx. 3.5 l / 100 km |
Individual evidence
- ↑ a b c d e f g h i j Mario Colombo: Moto Guzzi . 2nd Edition. Motorbuch Verlag, Stuttgart 1990. ISBN 3-613-01274-X
