| V-max is a category of its own. The mighty
V4 has made it to motorcycles cult heaven. The men behind this
monument on two wheels recall the making of V-max.
Debut
in Las Vegas in 1984
 |
| Mr.
Araki is General Manager of Yamaha motorcycle operations in
Japan. In 1984 he was project leader of V-max. |
Mr. Araki remembers: "V-max had
its first debut at the US dealer meeting at Las Vegas in October 1984.
The bike was targeted for the 1985 season, to be sold in US first. Its
key word was as simple as effective: American Hotrod. Its sensational
appearance was very different from other typical American models at
that time. So the bike became the highlight of the dealer show."
With 145 HP and a V4 1200 cc engine, the
machine had the potential for the most powerful acceleration ever seen
before on a road legal production machine. Soon after the US
introduction also European journalists and customers pushed for
introduction of V-max.
Mr. Araki:
"We were a little overwhelmed by this strong positive
reaction both from US and Europe."
Concept: strongest V4 motorcycle
Many motorsports fans enjoy the powerful
acceleration of large displacement V8 engines. Also drag races had
been actually recognized as a professional competition when Yamaha
started a project to build a motorcycle with an image of a V8 hotrod.
This was the start of the development of V-max. The concept for the
development for the model was very simple and clear- to build the
strongest bike with V4 engine.
Says Mr. Araki: "There was one
impressive scene I saw, when I visited the USA to study the market. It
was a ' Bridge Race'. Each time two bikes lined up and set off. They
simply competed for acceleration speed for 400 meter. Young people
were crazily enjoying the Zero 4 race (400- meter race). (Of course
it was not an official name of the race but Yamaha R&D staff
nicknamed it). They were using a bridge over the Mississippi
River. They started from one end of the bridge, and the finish line
was the opposite side. It was a simple rule. First concept I imagined
from this impressive race was 'To make a bike, which is strong at
straight lines and really fast.' It was the birth of the 'V-max'
concept."
A month in isolation
|
| 1984: an early
rendering sketch from GKDI design in Santa Monica |
With holding this impression in his mind, Mr.
Araki crammed himself in a room of GKDI design company in Santa
Monica, California, a external Yamaha design office. For nearly one
month with his colleague, Mr. Ashihara (engine design) and Mr. Kurachi
(body design) they worked to put this image on paper. Ed Burke, senior
product planner from Yamaha US supported the team in concept work and
research . After intensive studies, they created a 1:1 rendering
sketch. As soon as they completed the sketch, they flew back to Japan
with it to present it internally.
 |
| Mr.
Ashihara was responsible for V-max engine design |
Mr. Ashihara: "We have been
designing an engine for the Venture Royal at that time, but it was
prioritized to have its power in low and mid range. It honestly had
potential, but we had to sacrifice its horsepower for better
practicability. We had to clear the emission standards and all in all
we faced a lower power output than we desired. That made us a bit
frustrated and we were excited to brow off our frustration with V-max.
However, honestly speaking, it was unexplainably tough to improve the
only 90 HP engine of the Venture to 145 HP of V-max."
First plan: turbo charger
|
| Cutaway drawing
1986: the V-boost intake in blue and exhaust in red. Fuel tank
under the seat and aircleaner under"tank-cover". |
Mr. Ashihara continues: "Not only
we had to increase peak power from 7000 rpm to 8500 rpm, but also we
had to review overall features from different aspects such as
compression ratio, intake and outlet air induction rate. We also
considered using a turbo to increase the horsepower. But there was not
enough space for it. Then, we figured out the V-boost. This new
technology 'V-boost' gave unexpected high horsepower.
When the performance increased, of course, we had to improve the unit
drive and its durability. There were many things to solve as we
progressed further."
|