Power steering first for Yamaha Grizzly ATV

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August 31, 2006 In a first for the ATV market, Yamaha has introduced an electric power steering system on its new Grizzly 700 EPS. The Grizzly’s power steering system varies with both vehicle speed and engine speed (RPM), so that the rider benefits from more assistance when needed at low speeds and tight corners and less when on the move. Powering the Grizzly 700 EPS is the proven fuel injected, four-stroke forward-inclined single cylinder and liquid-cooled engine now with a ceramic composite coated, all-aluminium cylinder and a swept volume of 686cc, a reverse-facing air intake, electronic fuel injection, straight intake tracts and four valves per cylinder. The Grizzly comes in several variants including a duck hunting version complete with rifle carrier and a box to keep the ducks in (pictured). Another great photo gallery with this story.

It also features a high-efficiency radiator mounted high in the chassis to protect against mud and debris.

To assist with braking, the engine features Yamaha’s Engine Brake Control, which helps to slow the ATV when descending steep downhills. Like the Grizzly 660 4x4, the Grizzly 700 4x4 EPS transfers power from its engine to the wheels through Yamaha’s Ultramatic V-Belt transmission featuring high and low range, reverse, plus parking brake.

By pressing a button on the handlebar, the rider can also select two or four wheel drive operation. In four wheel drive mode, the Grizzly 700 can use the differential lock to deliver the torque equally to all wheels for maximum traction. The straight layout design of the drive shafts reduces vibration and minimises torque fluctuations in the drive line.

The rear braking system and gear case have been redesigned in conjunction with the new independent rear suspension. Smaller and more compact, the gear case is extremely rugged and efficient. The dual front and rear hydraulic discs provide maximum stopping power for the new Grizzly

A sturdy double-cradle frame is crafted from tubular steel while double wishbone suspension features front and rear. The independent suspension system features five-way adjustable pre-load and offers generous wheel travel. The setup offers smooth action, high stability and excellent rider comfort.

The combination of the new chassis and suspension provides the Grizzly 700 EPS with a massive amount of ground clearance. Plus the riding position sits 25mm higher than that of the Grizzly 660 4x4, enhancing the rider’s ability to scan the horizon. The new vertically positioned automotive-style instrument panel suits the riding position with new features to ensure that the rider has all the key information.

Engine

New, Raptor-based four-valve combustion chamber design produces a potent combination of low-rev torque, right-now throttle response and high horsepower.

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