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Posted
You like tricky, eh mate?

Here's 'tricky'.

 

attachment.php?attachmentid=82846&stc=1&d=1395066431

 

:cool10:1971 Kawasaki Square Four 2 Stroke Prototype

the tank and instruments told me it was kawasaky after i got over thinking it was a gt750 derivitive lol so a bit triky

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Posted

1971-1972 Yamaha GL750

 

http://hooniverse.com/wp-content/uploads/2011/06/GL_750.jpghttp://hooniverse.com/wp-content/uploads/2011/06/GL_750_2.jpghttp://www2.yamaha-motor.fr/actu/IMG/jpg/ym50_doc-08-gl750.jpg

Posted

1962 Prototype Junak M14 Iskra

 

 

technical characteristics according to the documentation

engine designed: four-stroke , OHV OHC , twin-cylinder, in-line , spark ignition, air cooled,

Displacement: 350 cm ³

Bore: 62 mm Stroke: 58 mm

compression ratio: 8,5:1 - 9:1

Max Power: 21 hp / 6,000 rpm. / min - 26 KM/7000 rev. / min.

maximum torque of 32 Nm at 3200 to 4200 rpm. / min.

clutch: cztero tarczowe, wet, spring center

Transmission: four-

powertrain weight around 47 kg

brakes: mechanical drum, pełnopiastowe

Front suspension: swingarm pushed with hydraulic telescopic shock absorbers

Rear Suspension: Trailing arm with hydraulic telescopic shock absorbers

weight: 140 kg

Baku capacity: 13 l

Maximum speed: 140 km / h (design)

Posted
it is a Triumph but it is using the Rocket 3 motor. The Triumph motors were straight up and the Rocket 3 motors had the forward cant. Must be about a 74 or 75. Love the use of the original tank.

 

It is a 1975 Triumph Quadrant four, 1000cc. A factory prototype. http://www.venturerider.org/forum/showthread.php?t=83997&page=13

 

Try to keep up, Paul.

Just kidding. It was solved yesterday morning.

:whistling::backinmyday:

Posted
1962 or 63 Norton Electra 400 cc a baby Atlas.

 

By Golly! You are correct!

http://www.nortonownersclub.org/models/light-twins/lightweight-images/0093.jpghttp://www.nationalmotorcyclemuseum.co.uk/museum/exhibits/bikes/fullsize/norton-electra.jpghttp://www.ridermagazine.com/wp-content/uploads/2013/03/web-Retro-1-Norton.jpg

Originally for export only when launched in 1963, the Electra was Norton’s first motorcycle to offer electric starting and carry flashing indicators as original equipment. A revvy overhead valve short-stroke twin developed from the earlier 250cc Jubilee and 350cc Navigator, the 383cc Electra has a Lucas starter motor sited behind the cylinders and driving the crankshaft by chain. Despite its modernity, the Electra was not a success: its shortcomings included unreliable starting, engine vibration and heavy fuel consumption. Norton, whose entire production was moved to Associated Motor Cycle’s London plant in 1963, dropped the model after two years.

Posted
just to keep it going :detective::whistling:

Honda NR500 V4 racer, circa 1983.

 

http://images.motorcycle-usa.com/PhotoGallerys/xlarge/Honda_NR500_1983.jpghttp://image.sportrider.com/f/30653226/146_0910_12_z+honda_collection_hall+1983_NR500.jpg

Posted
my gess is a sunbeam

 

If that is your best guess, I suppose you want a hint, because Sunbeam is incorrect.

 

OK, BIG hint: __________ is known for designing very light weight mountain bicycles.

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