Moto Guzzi S series
| Moto Guzzi | |
|---|---|
 Moto Guzzi S (1934) |
|
| S series | |
| Manufacturer | Moto Guzzi |
| Sales description | S / GTS |
| Production period | 1934 to 1940 |
| class | motorcycle |
| Motor data | |
| 1-cylinder 4-stroke | |
| Displacement (cm³) | 498.4 cc |
| Power (kW / PS ) | 9.7 kW |
| Top speed ( km / h) | 105 km / h |
| transmission | 4-speed |
| drive | Chain |
| Brakes | drums |
| Wheelbase (mm) | 1400 |
| Empty weight (kg) | 147 |
| Previous model |
Moto Guzzi Sport 15 Moto Guzzi GT 16 |
The Moto Guzzi S-series is a series of motorcycles that the Italian company Moto Guzzi produced from 1934 to 1940.
history
In 1934 the S and GTS models with counter-steered motors appeared as alternatives to the sportier V and GTV models. The S has a rigid frame, while the GTS has rear suspension. The two models were intended for customers who couldn't get used to the V-series overhead engines. These motorcycles were also used as official machines by the “Milizia della Strada”.
In 1940, as the war progressed, the production of civil motorcycles was stopped. After the war, Moto Guzzi no longer built counter-steered engines.
technology
Engine and drive
The S series. 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 helical four-speed gearbox can be operated with a shift lever on the right side of the tank. A foot switch with a rocker switch on the right side of the engine was also available on request. 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 and without an air filter. The chrome-plated exhaust pipe is pulled back on the left side of the machine and ends in a cigar-shaped silencer.
Frame and chassis
The S series has a double loop pipe / sheet metal frame. While the S model has a rigid rear suspension, the frame of the GTS is equipped with a tail boom and a rear swing arm with cantilever suspension, the friction dampers of which are supported on the tail boom. The front wheel sits in a parallelogram fork with a barrel spring .
Tanks
The fuel tank has a volume of 12 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 chrome-plated copper pipes.
Wheels and brakes
The 19 ″ wheels are wire-spoke wheels and have half-hub drum brakes . The rear brake is operated via a foot lever on the left side of the engine and a linkage, the front with a cable from the handlebars. The foot brake lever can be operated with the heel.
Materials
The engine / gearbox housing is made of aluminum, the cylinder and cylinder head are made of gray cast iron . The frame, the rear swing arm, 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 are painted in dark red. The tanks are chrome-plated and partially painted. 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 | S / GTS |
| Construction period | 1934-1940 |
| Displacement | 498.4 cc |
| Bore × stroke | 88 mm × 82 mm |
| compression | 4.6: 1 |
| power | 13.2 PS (9.7 kW) |
| at speed | 4000 rpm. |
| transmission | 4-speed |
| wheelbase | 1400 mm |
| Empty weight | 147 kg |
| Front / rear tires | 3.25 ″ × 19 ″ / 3.50 ″ × 19 ″ |
| Top speed | 105 km / h |
| Fuel consumption | approx. 3.4 l / 100 km |
Individual evidence
- ↑ a b c d e f g h i Mario Colombo: Moto Guzzi . 2nd Edition. Motorbuch Verlag, Stuttgart 1990. ISBN 3-613-01274-X
