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THE CLASSIC TRITON

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

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Norton Motorcycle DSCN2766mods

Norton Motorcycle DSCN2766mods

Posted by Andrew Wright2009 on 2013-05-10 19:29:50

Tagged: , Norton , Motorcycle , Motorbike , Bike , Cars , Automobiles , Classic , Historic , Colne , Valley , Railway , Castle , Hedingham , Essex , England , UK

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Norton

Norton

Canon 350D with 18-55mm lens

Posted by zxious on 2009-09-14 21:06:52

Tagged: , Norton

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BC2013 226

BC2013  226

Norton Rotary

Posted by teamheronsuzuki on 2013-07-08 16:08:52

Tagged: , Norton , Rotary

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Vincent-HRD 1000 Rapide

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

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marks norton commando

marks norton commando

back lawn rotorua 1990s

Posted by southernspares on 2009-05-08 09:48:22

Tagged: , norton , commando

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Norton

Norton

Circuit de Gueux en Champagne

Posted by dprezat on 2009-09-28 15:43:41

Tagged: , Norton , Classic , Motos , Collection , Motorbikes , Motorcycles , Circuit de Gueux , Reims , Week end de l’excellence , Sony Alpha 700

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Norton Manx motorcycle racer Schwanenstadt GP (c) 2013 Берни Эггерян :: rumoto images – All rights reserved 5074 bw

Norton Manx motorcycle racer Schwanenstadt GP (c) 2013 Берни Эггерян :: rumoto images - All rights reserved 5074 bw

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Norton Manx racer GP Schwanenstadt Austria (c) 2013 Берни Эггерян :: rumoto images 5074 bw

Posted by Bernard Egger :: rumoto images on 2013-04-15 19:28:53

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