Get a full page advertising listing for your motorcycle business
Click Here!
NORTON ATLAS. PIIA 750CC. DESERT SLED HYBRID. UK 1968.
The 1968 P11A was the second version of the 750cc Norton Atlas-powered scrambler with a Matchless G85CS Reynolds 531 frame made for US cross-country racing. To suit it for street cruising as well, the P11A has a roomier seat than the original 1967 P11 and pillion footrests, while the upswept silencers have detachable baffles. The 1968 machine also carries the Norton Villiers ‘green blob’ logo on top of the fuel tank.
Development
The Mark 1 Atlas was launched as the 750SS in the early 1960’s. Designer Bert Hopwood’s 497cc Dominator engine was bored out to 745cc to appeal to American market and initially was only produced for export. The styling was also aimed at the US market with high-rise handlebars, small 2.5-gallon petrol tank and valanced chrome mudguards and chain guard. The look was completed with a heavy-duty WM3-18 rear wheel and a Lucas Competition magneto was supplied as standard.[1]
The engine had lower compression than the Dominator (at 7.6:1) and was fitted with a single 376 Amal monobloc carb giving 55bhp at 6500rpm. However the design also produced excessive vibration at high revs, so the compression ratio was reduced. The Atlas shared many cycle parts with the last of the Domminator twins and had Norton’s four-speed gearbox and heavy-duty clutch. Electrics were 6-Volt and it had Roadholder forks, adjustable Girling rear shocks and a slimline Featherbed frame.[1]
In 1964 the Atlas was upgraded to 12-Volt electrics, gained an extra carburettor and wider yokes. A UK version was launched with flat bars and twin instruments. The Atlas continued to be built until 1968 but by then the Norton Commando had taken over.[1]
[edit] Specials and Hybrids
Specialist tuners such as Dunstall produced Atlas based racers and the Metisse, and the factory-built Atlas-powered AMC-Norton hybrids even included an Atlas based off-road scrambler.[2] Over seven thousand Atlas hybrids were produced at Plumstead between late 1963 and late 1968 using Atlas engines and the featherbed frame. Most of these machines had complicated designations of numbers and letters instead of names
Posted by ronsaunders47 on 2011-02-01 09:38:48
Tagged: , MOTORCYCLES , MOTORBIKES , CLASSICS , NORTON , ATLAS , P11A , 750cc , DESERT SLED
Advertise your bike business at Bikes n Customs
#bikesncustoms
THE RUDGE MOTORCYCLE. UK.
Rudge Whitworth Cycles was a British bicycle and motorcycle manufacturer that resulted from the merger of two bicycle manufacturers in 1894, one of which descended from the original bicycle company founded by Daniel Rudge. Rudge motorcycles were produced from 1911 to 1946. The firm was known for its innovations in engine and transmission design, and its racing successes. Their sales motto was "Rudge it, do not trudge it." The company also produced the first detachable wire wheel in 1907,[1] and was known for its knockoff wheels on sports cars well into the 1960s.
This model is probably the Rudge Ulster sports version. Had a great track record on the Isle of Man and Ulster TT.
1930s Isle of Man TT victories
Rudge bikes finished first, second and third at the 1930 Junior TT using prototype radial 350 cc 4-valve engines. They also took first and second in the Senior TT. The road bike engines were changed to dry sump lubrication. The JAP 250 and the parallel four-valve 350 cc ended production in this year.
In 1931 Rudge released its first 250 cc and 350 cc road machines with the radial-valve layout. TT Replicas were available in 350 cc and 500 cc. The parallel-valve 500 cc was also available in Special and Ulster models, the Ulster now having a 100 mph guarantee. First and second were taken in the 1931 Lightweight TT, and in 1932, second and third.
A radial-head 500 cc was produced for 1932 only. A 250 cc TT Replica was built, and the road bikes were fitted with proper oil bath primary chains, and a stand that could be operated “with just one finger”.
Posted by ronsaunders47 on 2011-07-10 12:44:40
Tagged: , MOTORCYCLES , MOTORBIKES , CLASSICS , RUDGE , ULSTER , RACING , TT
Advertise your bike business at Bikes n Customs
#bikesncustoms
Drag Star Trike Motorbikes – 2002
Drag Star Trike Motorbikes – 2002
Posted by imagetaker! on 2008-08-26 09:05:11
Tagged: , Motorcycles , Motorbikes , Trikes , Drag Star Trike , UK Bikes , Bike Show , Baildon , Woodbottom Club , England , Car Photographs , Motorbike Images , Cool Transport Photos , Motor Vehicles , pete barker , imagetaker1 , Transport , Peter Barker , Photographer , Bike Images , Rides , Motorbike Photography , Car pictures , flickr bike photos , Old Bikes , Bike Shows , Motorcycles UK , British Classic Cars , Trike Bikes , Trike , Three Wheelers , Trike Motorbikes , Trike Motorcycles , Motorbike Trikes , Motorcycle Images , transport images , transport photos , Transport Pictures , Transport Photography , Car Photos , Motorcar Images , Wheels , Drag Star Trike Bikes – 2002 , Motorbikes of 2002 , Bike Photographs , Motorbike Photos , Trike Collections , Photos of Motorbikes , Photographs of Motorbikes , Pictures of Motorbikes , Images of Motorcycles , Images of Motorbikes , Motorcycle Pictures , Motorbike Pictures , Picture of Motorcycles , Photographs of Motorcycles , Pictures of Motor Cars , Drag Star Trike Motorbikes – 2002 , Motorcycle Fotos , Motorbike Fotos , Car Images , imagetaker! , Bikes Trikes , OldTimers , PETE-B , Car Photography , Classic Vehicles , Classic Motors , Automobiles , Blast from the Past , Image Capture
Advertise your bike business at Bikes n Customs
#bikesncustoms
Norton
Vincennes
Posted by dprezat on 2012-11-04 18:16:00
Tagged: , Norton , Triton , Classic , Moto , Collection , Motorbikes , Motorcycles , Biker , Vincennes , Sony Alpha 700
Advertise your bike business at Bikes n Customs
#bikesncustoms
Suzuki-Heron 500, ex-Philippe Coulon & Suzuki-Life 500, ex-Phil Read
Posted by Cédric JANODET on 2012-07-04 21:04:55
Tagged: , heron , life , coulon , read , biker’s , classics , spa , francorchamps , stavelot , malmedy , blanchimont , belgique , belgium , moto , motorcycles , motorbikes , motorrad , anciennes , oldies , fast , freddie , spencer , honda , kawasaki , yamaha , suzuki , norton , ajs , bsa , triumph , seeley , yoshimura , martin , corki , gg , godier , genoud , bakker , bimota , benelli , laverda , guzzi , ducati , vincent , dholda , endurance , schwantz , lawson , roberts , lavado , baker , saarinen , bmw
Advertise your bike business at Bikes n Customs
#bikesncustoms
THE CLASSIC TRITON
The Triton was a modified Café racer motorcycle of the 1960s-1970s. The name derives from a contraction of Triumph and Norton; the two brands of motorcycle combined.
The intention was to combine the best elements of each to give a superior bike to either. The usual practice was to take the Triumph parallel twin engine and use it to replace the engine on a Norton Featherbed framed motorcycle that was regarded as the best handling motorcycle of the day. The Triumph Bonnevilles engine that already had twin carburettors was a popular engine choice. This engine, as well as other Triumph twin-cylinder engines, gave good performance and reliability and could be easily tuned for greater power by the addition of high-profile camshafts, high compression pistons and twin carburettors or fuel injectors amongst the more common power contributing modifications. There was also a Weslake 8 valve head available for the Triumph.
The Norton 650 and 750 vertical twin engines had a reliability problem. At about 7000 rpm the piston exceeds the engineering limit for piston speed, so over-revvers soon destroyed their engines. The BSA 650 had a bronze bush main bearing on the right hand side, doubling as the crank oil feed, with a lack of effective crankshaft end play control, that all had difficulty staying together when thrashed, even though the rest of the design was possibly better than the Triumph. The Triumph vertical twin used a ball on the timing side, and a roller on the other, with the oil feeding through a separate bronze bush in the outer right hand engine side cover. The Triumph was the pick of the bunch.
Triton Peter Ritzen.jpg
Whereas the Norton 650SS 646.44 cc had a bore and stroke of 68 x 89 mm giving 49 bhp (37 kW) @ 6,800 rpm, the Triumph T120 Bonneville 649.31 cc had a bore and stroke of 71 x 82 mm giving 46 bhp (34 kW) @ 6,500 rpm. However the mean piston speed of the Norton was 3,971 ft/min (dangerously close to the then accepted limit of 4,000 ft/min). The Triumph, with its shorter stroke, had a mean piston speed of only 3,497 ft/min, had much less vibration and was much stronger and reliable. Road tests showed that the Norton had a higher top speed due to its 3 bhp (2.2 kW) advantage. In spite of this, the Triumph was the much preferred engine. The Norton featherbed was the preferred frame. Hence the Triton.
If the Triton used a pre-unit Triumph motor, then the AMC gearbox used in Nortons after 1960 was better than the equivalent Triumph gearbox. There was also the Quaife five speed.
A common choice for the modern day Triton is to use a Triumph unit construction twin in a featherbed frame.
Several motorcycle dealers made equipment for Triton conversions, some would do the complete job for customers while others sold complete Tritons. The most important part required are the engine mounting plates and several different designs exist that can affect the engine placement and therefore the handling. The lower the engine is mounted the better the handling achieved from the Norton frame.
The Tribsa, an alternative to the Triton, was a Triumph engine in a BSA frame but other frame and engine combinations were also made.
Vincent V-twin motors have been fitted into featherbed frames making a hybrid called a Norvin.
Posted by ronsaunders47 on 2010-11-21 10:55:35
Tagged: , MOTORCYCLES , MOTORBIKES , TRITON , CLASSICS , BRITISH , NORTON , TRIUMPH , CAFE RACER , FEATHERBED
Advertise your bike business at Bikes n Customs
#bikesncustoms
Vincent-HRD 1000 Rapide
Posted by Cédric JANODET on 2012-07-04 21:31:42
Tagged: , vincent , hrd , rapide , biker’s , classics , spa , francorchamps , stavelot , malmedy , blanchimont , belgique , belgium , moto , motorcycles , motorbikes , motorrad , anciennes , oldies , fast , freddie , spencer , honda , kawasaki , yamaha , suzuki , norton , ajs , bsa , triumph , seeley , yoshimura , martin , corki , gg , godier , genoud , bakker , bimota , benelli , laverda , guzzi , ducati , dholda , endurance , schwantz , lawson , roberts , lavado , baker , saarinen , bmw
Advertise your bike business at Bikes n Customs
#bikesncustoms
Talmag Trophy Trial (motorcycle), Hants, Jan 2015
Some photos from the 2015 Talmag Trophy Trial held at Hungry Hill near Aldershot on Sunday 25 January 2015. (Talmag stands for Territorial Army (London) Motor-cycling Club.)
The event attracts mainly older, British-made bikes, both solo and sidecar.
Posted by roger.w800 on 2015-01-27 17:47:37
Tagged: , bike , bikes , motorbike , motorbikes , motorcycle , motorcycles , motorcycling , bikers , riders , motorbike trial , motorcycle trial , Aldershot , Hampshire , Hungry Hill , solo motorcycle , Enfield , Calthorpe , Panther , rider , passenger , trials bike , trials bikes , Triumph , BSA , Ariel , Royal Enfield , Ossa , Yamaha , Suzuki , Matchless , AJS , AMC , sidecar , British bike , classic bike , vintage bike , motorcycle sport , off road
Advertise your bike business at Bikes n Customs
#bikesncustoms
Recent Comments