|
Classic Bikes
Custom Bikes
Individual
Racing Bikes AJP
AJS
Aprilia
Ariel
Avinton / Wakan
Bajaj
Benelli
Beta
Bimota
BMW
Brough Superior
BRP Cam-Am
BSA
Buell / EBR
Bultaco
Cagiva
Campagna
CCM
CF Moto
Combat Motors
Derbi
Deus
Ducati
Excelsior
GASGAS
Ghezzi Brian
Gilera
GIMA
Harley Davidson
Hero
Highland
Honda
Horex
Husaberg
Husqvarna
Hyosung
Indian
Jawa
Kawasaki
KTM
KYMCO
Laverda
Lazareth
Magni
Maico
Mash
Matchless
Mondial
Moto Guzzi
Moto Morini
MV Agusta
MZ / MuZ
NCR
Norton
NSU
Paton
Peugeot
Piaggio
Revival Cycles
Roland Sands
Royal Enfield
Sachs
Sherco
Sunbeam
Suzuki
SWM
SYM
Triumph
TVS
Ural
Velocette
Vespa
Victory
Vincent
VOR
Voxan
Vyrus
Walt Siegl
Walz
Wrenchmonkees
Wunderlich
XTR / Radical
Yamaha
Zero
Video
Technical
Complete Manufacturer List
|
Yamaha 125 & 250 V-Four cylinder 1968
Yamaha 125 & 250 V-Four cylinder 1968 The Honda six-cylinder made its debut at Monza in September,
1964. The motorcycle had been designed to make life difficult for the Yamaha 250
RD 56. So it was all off for Yamaha until the 1966 season. Despite
the engine's remarkable power, Read never managed to get the most out of it
because of serious problems involving maneuverability and weight. He was the
eternal second in 1966. In 1967 Read and Yamaha had their first wins, and so did
teammate Bill Ivy. The four-cylinder Yamaha was the fastest 250 that had ever
appeared on a track, but it was not yet the most competitive vehicle in its
class. Then the FIM decided to limit 125-cc. and 250-cc. engines to two cylinders, and Yamaha made the first of several withdrawals from racing. At the time the four-cylinder 250 was the most advanced racing motorcycle around. That year's model weighed some twenty pounds less than the prototype that had debuted at Monza and had a little more horsepower. It could go extremely fast for a 250. In a clocked leg of the Tourist Trophy it had run at some 150 m.p.h., which meant that it could go even faster in other conditions. This made it competitive with some of the finest 500-cc. motorcycles. In 1967 Yamaha developed a 125-cc. model from the
four-cylinder 250. The 125 was designed to replace the two-cylinder RA 97, which
had won several Grand Prix races in 1966 but had failed to take the world title. Despite the superiority of the four-cylinder 125, the Yamaha people were fully aware of the threat of the five-cylinder Honda 125's return, and they had heard talk about a six-cylinder version. The Yamaha technicians worked hard on the engine and managed to get another 7 h.p. out of it. Read and Ivy had a pair of two-wheelers that could deliver really exceptional acceleration and speed for their size. The 125 became a bone of contention within the Yamaha team. Read had never managed to ride the 250 to victory over Hail-wood's six-cylinder Honda, and Ivy kidded him about it. Read won in the 250 class in 1968 and decided to go after the title earmarked for Ivy as well. Phil Read succeeded, winning the championship with the four-cylinder Yamaha. He was dismissed from the team at the end of the season Motorcycle: Yamaha 125-250 Four-cylinder
|
|
Any corrections or more information on these motorcycles will be kindly appreciated. |