Yamaha V-Max

The Yamaha V-Max is a motorcycle manufactured by Yamaha, which is known for its powerful V4 engine, shaft drive, and distinctive styling.












History

John Reed, an English designer who lived in California was contracted by Yamaha to design the ultimate custom bike. He designed a muscle cruiser based on the Venture engine.[1]

Upon its release in 1985, the V-Max garnered instant critical acclaim and earned the title "Bike of the Year" from Cycle Guide.[2] Sold both in Japan and abroad, the V-Max has been on the market with only minor modifications since the 1985 model year, making it one of the best-selling Japanese motorcycles of all time.[citation needed] The V-Max was noted for its quick acceleration, but was also criticized for its poor cornering ability and soft suspension.[3][4][5]

The Honda X-4 was created in response to its overwhelming success, but was in production for only six years, proving unable to shake the V-Max's popularity and exceptional reliability.[citation needed]
Valves and cylinder inside a cutaway V-Max engine.

Until 2007, the original V-Max was offered for sale through the Star Motorcycles division of Yamaha Motorcycles. Apart from a minor freshening to the bike's specifications in 1993, when the bike gained a larger-diameter fork to minimize high-speed wobbling and drift, four-piston brake calipers, and other handling and safety related upgrades, the 2007 V-Max was almost the same as the original 1985 version.[6]
[edit] Specifications

Overall, the V-Max was 2,300 mm (91 in) long, 795 mm (31.3 in) wide, and 1,160 mm (46 in) high. The engine was a tuned version of the double overhead camshaft, four valve per cylinder, liquid-cooled V-4 from the Yamaha Venture. Along with other modifications to the engine, the compression ratio was raised to 10.5:1, and the V-Boost system was added.
V-Boost

V-Boost is a patented System from Yamaha which opens butterfly valves between the manifolds of the 1st and 2nd and between the 3rd and 4th cylinder starting from 5750 rpm. The valves are opened gradually to match the rising rotational speed signal provided by the ignition system. The valves are at the full open position at 8000 rpm. There is a small black box that reads the rotational speed and sends a computed signal to a servo motor. The servo pulls a wire to open the butterfly valves. The V-Boost System adds 10 percent to the top power rating of the base engine.

VMAX
Yamaha VMAX Yamaha 1700 VMax.jpg
Manufacturer Yamaha
Production since 2009
Predecessor Yamaha V-Max
Successor none
Class power cruiser
Engine 1,679 cc (102 cu in) liquid-cooled DOHC V-4
Power 197.4 hp (147 kW) @ 9000rpm at crank
Torque 123 ft·lbf (17.0 kg·m) @ 6500rpm
Transmission 5-speed, slipper clutch
Frame type cast aluminum
Suspension adjustable front and rear
Brakes Front: radial mount 6-piston calipers, dual wave-type 12.6" (320 mm) discs, brembo master cylinder
Rear: single piston caliper, wave-type 11.7" (298mm) disc, Brembo master cylinder
Wheelbase 66.9 in (1699.3 mm)
Dimensions L 94.3 in (2395.2 mm)
W 32.3 in (820.4 mm)
Seat height 30.5 in (774.7 mm)
Weight (dry), 683 lb (309.8 kg) (wet)
Fuel capacity 4.0 US gallon (15.1 litres, 3.3 Imperial gallons)

In 2005, at the 39th Tokyo Motor Show, Yamaha displayed an all-new V-Max concept bike. It featured a new chassis, upgraded components all around, and state-of-the-art braking components.[8]

On 4 June 2008, Yamaha officially released a completely redesigned 2009 VMAX in North America and Europe. The features of the VMAX include an all aluminium frame with its 1,679 cc (102 cu in) liquid cooled V4 DOHC engine used as a stressed member of the chassis, an electroluminescent instrument readout, Yamaha Chip Controlled Intake (YCC-I), fully adjustable suspension, anti-lock brakes, slipper clutch, a fuel tank beneath the seat, and a distinctive key.[9]

On 20th September 2009, VMAX was also launched in India with a price tag of 20 lakh rupees($50,000).[10]
[edit] YCC-I/YCC-T

Instead of the V-Boost on the original carburated V-Max, the fuel injected VMAX uses YCC-I and YCC-T. Yamaha Chip Controlled Intake (YCC-I) is a new addition to the VMAX. The airhorns inside the airbox are lifted by a servo activated at 6650 rpm to open up the airway underneath. This shortens the length of the intake system from 150mm to 52mm. This system had its first appearance in the Yamaha stable with the 2006 YZF-R1. The MV Agusta F4 Tamburini was the first bike with such a system. Massimo Tamburini invented this idea. It is called Torque Shift System (TSS) on the Agustas.

Yamaha Chip Controlled Throttle (YCC-T) is also a new addition. The throttle cables are connected to a throttle position sensor and a new computer called G.E.N.I.C.H. that operates the butterfly valves, the EXUP valve in the exhaust and the other components involved, such as the igniter unit, and the YCC-I lifter unit. The YCC-T computes all the input of the sensors and calculates the best throttle position, ignition advance, EXUP valve and injection time in milliseconds.