Silk 700
 Silk 700 S. |
|
| Manufacturer | Silk |
| Production period | 1975 to 1979 |
| class | motorcycle |
| design type | Naked bike |
| Motor data | |
| Two-cylinder two- stroke engine with cross-flow flushing and thermosiphon cooling | |
| Displacement (cm³) | 653 cc |
| Power (kW / PS ) | 54 horsepower at 6000 min -1 (Mk II 1977) |
| Top speed ( km / h) | 170 km / h |
| transmission | 4 courses |
| drive | Chain |
| Brakes | Disc / drum |
| Wheelbase (mm) | 142 cm |
| Empty weight (kg) | 160 kg |
The Silk 700 was a motorcycle made by Silk Engineering, based in Darley Abbey, Derbyshire , England , with a two-cylinder two - stroke engine . The motorcycle engine designed for cross-flow purging was one of the last to have a multi-cylinder nose piston . 138 units were made between 1975 and 1979 before Silk ceased production.
History and technology
Silk Engineering was founded by George Silk and Maurice Patey in the late 1960s to manufacture spare parts for Scott motorcycles. In 1971, George Silk presented a racing machine with a Scott engine in a frame and with a telescopic fork from Spondon Engineering for the Isle of Man TT races . In 1972, Silk presented a street version to the public, but it was not produced until 1975. The first 20 Silk 700 had Scott engines, the Mk I (also known as Silk 700 S), which was built from October 1975 onwards, had an engine developed by Silk independently with electronic ignition, four crankshaft bearings and primary drive between the cylinders. It developed 45 hp (34 kW) at 6000 rpm and delivered its maximum torque of 45 lb ft (61 N m) at 3000 rpm. The aluminum housing of the engine was partially black anodized. The loss of lubrication worked with an oil pump which metered in over speed and throttle position, oil from a separate tank supported in the main bearings. The gasoline consumption was given as 7 liters / 100 km and the oil consumption as 0.12 liters / 100 km.
In contrast to two-stroke engines, which had been equipped with the well-known reverse scavenging system since the 1930s , the Silk engines (bore / stroke 76 × 72 mm) were a "rebirth" of the water-cooled Scott engines with cross-flow scavenging and nose pistons , which were introduced in 1911 Scott Model 3 3/4 had been used. The Silk 700 S with 34 mm Mikuni gasifier has been in their time with Japanese two-stroke motorcycle inter alia with the Suzuki GT750 compared and fell in particular by a low-torque curve (maximum torque of 61 Nm at 3000 min -1 ) and a "very good handling ”. Low production figures led to a sharp rise in prices to 3000 pounds . So the Silk was not competitive compared to Japanese two-stroke engines.
Silk 700 S.
Silk 700 S.
literature
- Roger Hicks: The International Encyclopedia Motorcycles. Motorbuch Verlag Stuttgart, 1st edition 2006, ISBN 978-3-613-02660-5 .
- Andrew Kemp, Mirco De Cet: Classic British Bikes . Abbeydale Press, 1997, ISBN 1-86147-005-3 .
Web links
Individual evidence
- ↑ a b c Oldtimer Markt 10/2000 ( Memento of the original dated August 12, 2015 in the Internet Archive ) Info: The archive link was inserted automatically and has not yet been checked. Please check the original and archive link according to the instructions and then remove this notice.
- ^ Hicks, p. 447.
- ↑ Andrew Kemp, Mirco De Cet, p. 178.
- ↑ http://ridermagazine.com/2013/03/07/retrospective-silk-700s-1975-1979/ Article on the UK website ridermagazine.com
- ↑ Hicks, p. 448
- ↑ http://www.scottownersclub.org/silk_files/V09N10P016.pdf
- ↑ scottownersclub.org Silk 700 (accessed July 19, 2015)
- ^ Andrew Kemp, Mirco De Cet, p. 179.
- ↑ Roland Brown: Motorcycles of the World. Motorbuch Verlag Stuttgart, 2nd edition 1999, ISBN 3-613-01830-6 , p. 227.
