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Ossa Motocycle 
From Wikipedia, the free encyclopedia
Ossa Motocycles
 Ossa was a motorcycle manufacturer based in Catalonia, Spain which was active from 1924 to 1982. Founded by Manuel Giró, an industrialist from Barcelona. Ossa was best known for lightweight two-stroke-engined bikes used in observed trials, motocross and enduro. The company was known originally as Orpheo Sincronic Sociedad Anónima (O.S.S.A.) and was later renamed Maquinaria Cinematográfica, S.A.. In 2010, the Ossa brand was reborn when the trademark was purchased and a new company began producing motorcycles . 
Ossa Motocycles

The original Ossa company got its start in 1924 making movie projectors for its home market in Spain. After World War II, Ossa, like several other manufacturers from BSA to Harley-Davidson to Yamaha, began producing two-stroke engined motorcycles, with their first mass produced model being introduced in 1949. Ossa reached its highest production levels in the motorcycle boom of the 1960s, exporting large numbers of exports to other European countries, but also significantly, to North American markets. In the United States and Canada, off-road motorcycling - and particularly the newly imported sport of motocross to which the light-weight and powerful Ossa was well suited - enjoyed a surging popularity.
The Ossa firm was a strong supporter of all forms of motorcycle sport including: road racing, motocross, enduro and observed trials. Their first success came at the 1967 24 Hours of Montjuichon the streets of Barcelona. Against all the major Spanish factories, Ossa motorcycles finished a surprising first and second.[4] Inspired by this success, the factory decided to compete abroad in order to make inroads into the international market. They achieved some success in the AMA Grand National Championship, with rider Dick Mann helping them develop a 250cc dirt trackbike on which he won the 1969 Santa Fe Grand National short track event, held on a quarter-mile dirt track oval. They also achieved early success in Grand Prix road racing, competing with an innovative monocoque-framed bike designed by Giró's son, Eduardo and ridden by Santiago Herrero. Herrero won four 250 cc Grands Prix with Ossa before he died while competing at the 1970 Isle of Man TT. The loss of their star rider affected the Ossa team so much that they withdrew from road racing altogether.However, Ossa redirected their competitive efforts into the sport of Observed Trials in Europe and the United States alongside such other famous Spanish makes as Bultaco and Montesa. Ossa hired British rider Mick Andrews to help design and ride their trials bike, and they went on to capture the 1971 and 1972 European Trials Championship, the forerunner to the FIM World Championship. Andrews won the grueling Scottish Six Days Trial three consecutive years between 1970 and 1972 for the Ossa factory.
In addition to their suitability for racing, in terms of power-to-weight, Ossa motorcycles soon gained a reputation for reliability on and off the track. Despite this growing enthusiasm for the beautifully crafted and rugged bikes themselves, the firm suffered from a disorganized and sparse dealer network in the important American market. Ironically, the motorcycle boom that created a new market and allowed the European makes to reap great financial rewards, was also the seed of their own demise, and that of the numerous smaller firms, such as Ossa. With so many choices of make for both buyers and dealers, sales and service networks were not sustainable, and attempts to improve manufacturing by investing in new factories back home put Ossa, like virtually every other European firm, deep into the red.
In the declining years of the Franco Era, in 1975, the Spanish government steadily converted Spain's economic structure into one more closely resembling a free-market economy. The arrival of cheaper Japanese motorcycles into the local economy as well as a crippling employee strike in 1977 spurred the downfall of the Ossa company. In 1979, the company merged with Bultaco but this wasn't enough to stave off financial problems. By 1982, the Ossa factory was closed. Nonetheless, as a Vintage make, the Ossa still enjoys a significant following among home hobbyists and amateur racers.

Ossa-based bikes
A 1972 Yankee 500 Z with a 500 cc Ossa engine
Ossa SPQ, OSSA Seurat Piron Queyrel. Produced in France in the 1970s, the SPQ was an air-cooled 250 cc road racing motorcycle with a light frame and an OSSA engine. The SPQ excelled in French hillclimbing and criterium races in the decade, but was no match for the Yamaha TD2 in circuit competition.
Yankee 500, a large off-road motorcycle produced in Schenectady, New York by the Yankee Motor Company. The Yankee, also known as "Ossa Yankee", had a 500 cc air-cooled Ossa twin-cylinder two-stroke engine, designed by Eduard Giró.Ossa BYRA 1000, a 977 cc four-cylinder two-stroke air-cooled road racing motorcycle built in Barcelona by engineer Fernando Batlló. The motor was based on two Yankee engines. This bike took part in the 24 hours of Montjuich races in 1972 and 1973. Only one was built as a road racing prototype and another as a street bike. This bike survives at the Bassella Motorcycle Museum, Alt Urgell.

Models
Ossa motorcycle Street
Ossita 50
Ossa 125 C2
Ossa 150 Comercial
Ossa 160 T
Ossa 175 Sport
Ossa  230 Wildfire
Ossa Sport 250
Ossa 250 T
Ossa 250 TE
Ossa 250 79
Ossa 250 F3
Ossa 500 (Street), with a 500 Yankee motor
Off-road
Dick Mann Replica/DMR (Flat track)
ST1 (Flat track)
Desert (Motocross/Trail)
Explorer (Trials)
Gripper (Trials)
Mick Andrews Replica (Trials)
Ossa  250 Enduro (Enduro)
Ossa  Mountaineer (Enduro)
Ossa  Phantom (Motocross)
Ossa  Pioneer (Enduro)
Ossa  Plonker (Trials)
Ossa  Super Pioneer (Enduro)
Ossa  Six Day Replica (Enduro)
Ossa  Stiletto MX (Motocross)
Ossa  500 Yankee Z

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