MOUNTAIN

NEW! MOUNTAIN SRX 700

Let's start at the top, with the new Mountain SRX 700. The first thing you'll notice when you set your eyes on this sled is the new hood shape, painted in the stunning blue color of Team Yamaha racers. Backing up that competitive look is equally powerful performance under the hood. Tucked deep and low in the lightweight ProAction System chassis is a high-tech, three-cylinder 696 cc engine with new engineering, attached to triple exhaust pipes tuned to maximize horsepower.

Compact and lightweight, the Yamaha powerplant has a new crankcase, crankshaft, cylinders, pistons and heads. Engineering features include triple TM33 flat-slide carbs, case reed induction and triple exhaust ports. Yamaha engineers report the new engine delivers the highest horsepower in its class, offering deep-powder riders the ultimate in Yamaha performance for the '97-'98 riding season.

ELECTRONIC POWER VALVES

Triple pipes account for a good share of the big HP advance in the new SRX. Another is Yamaha's ability to design and build the trickest, highest-tech features in the sport. On the SRX, that includes a computer-controlled exhaust power valve system, with technology borrowed from gran prix motorcycle racing.

Competitive power valve designs are activated by exhaust pressure or cylinder pressure. Yamaha's new system is electronically controlled. A computer monitors engine RPM, then feeds the information to a servo motor. The motor in turn adjusts the exhaust valves for optimum timing and maximum horsepower across the entire powerband.

Yamaha engineers also made the power valve system self cleaning, preventing carbon buildup and valve sticking problems sometimes experienced with competitive systems.

Another SRX exclusive is a new air management system designed to control air flow from intake to muffler for maximum performance. There's an advanced air flow design within the crankcase engineered to optimize scavenging efficiency and horsepower, and large-diameter triple exhaust pipes are shaped for efficient exhaust flow and maximum power.

ADDITIONAL FEATURES

If all this premium, high-tech engineering isn't enough to grab the attention of performance-minded mountain riders, the following list of additional features on the new Mountain SRX 700 certainly will:

• The 136-inch Mountain Master Track has a 1.5-inch high profile for superior traction and flotation.
• New! Plastic skis are light in weight and enhance sidehilling.
• New! Large-diameter speedometer and tachometer are easy to read.
• New! Large, 34 mm crankshaft and new roller bearing design provide extra durability for the high-output 700 engine.
• New! Large-capacity heat exchangers help optimize cooling.
• New! 15-plate drive chain is designed to handle the power of the SRX engine.
• New! Powder metal forged pistons, brand new technology from Formula I automobile racing, enhance performance and durability.
• New! Plastic suspension wheels are lightweight and efficient.
• New! Thermostat in cooling system allows engine maintain a consistent temperature.
• New! Large-capacity coils in Digital C.D. ignition provide strong, consistent ignition spark.
• New! Engine torque rod maintains clutch center-to-center distance for optimal performance.
• New! Liquid-heated carburetors to maintain throttle response and fuel economy.
• Lightweight, ProAction System chassis with all-aluminum frame and one-piece, die-cast aluminum bulkhead subframe has up to twice the torsional rigidity of competitive designs for premium handling.
• Advanced independent Front Suspension uses long, tapered trailing arms for superior strength. Spindles feature large, wide splines to maintain ski alignment better than competitive designs. Rebuildable, aluminum-body KYB gas shocks have adjustable spring preload. Needle bearings minimize friction. Link-type stabilizer bar enhances handling.
• ProAction Plus X long-travel rear suspension is consistently rated #1 for the plushest ride in snowmobiling. Rebuildable, aluminum-bodied KYB gas shocks have 1 1.5 inches of true, useable travel. Bearings or bushings at key pivot points reduce friction for quick, efficient action. A 3-position rear shock mount allows changing effective spring rate without changing springs.
• Advanced hydraulic brake features a high-quality Nissin master cylinder with "dog-leg" lever requiring one or two-finger effort. Rotor has interpassage ventilation for low brake temps and consistent braking. Separate mechanical parking brake.
• Two-position bracket allows rear suspension to be adjusted for greater chassis clearance in deep snow.
• Mid-height windshield, full instrumentation, industry-exclusive adjustable hand and thumb warmers and a 12 gallon fuel tank.

MOUNTAIN MAX 700

After a season of taking riders to the top, this deep-snow performer is back. The Mountain Max 700 features the lightest three cylinder engine on the market. In fact, it's also lighter than some twin-cylinder powerplants. With a 698 cc displacement, it has triple exhaust ports, and a single, tuned exhaust pipe to maximize power while it minimizes weight.

New for 98 on the Mountain Max 700 are plastic skis, engineered to be lightweight and enhance sidehilling. Other deep-snow features include:

• 136-inch Mountain Master Track with 1.5-inch high profile.
• ProAction Plus long-travel rear suspension with 11.5 inches of travel and spring preload adjusters.
• 3-position rear shock mount that allows changing effective spring rates without changing springs.
• Two-position bracket that allows greater chassis clearance for those who ride in extreme snow depths.
• 38.5-inch ski stance for enhanced handling and sidehilling in deep snow.
• Adjustable hand and thumb warmers and a 12 gallon fuel tank.
• Heat Red paint, new graphics, new two-color seat design.

MOUNTAIN MAX 600

The Mountain Max 600 is designed for deep-snow 600 riders who want to put the high mark on the mountain with all the latest Yamaha technology. It's a proven powder sled with its own list of high-tech features:

• 136-inch Mountain Master Track with 1.5-inch high profile.
• New! Plastic skis are lightweight and designed to enhance sidehilling.
• Compact, high-output 598cc twin-cylinder engine with triple exhaust ports and ceramic composite cylinder plating, set low in its lightweight, yet strong and rugged ProAction System chassis.
• Unique SMART Carb system that automatically adjusts fuel flow to the optimum settings for changes in air temperature and elevation, requires no battery and is lighter and less complex than EFI.
• ProAction Plus long-travel rear suspension with 11.5 inches of travel.
• Ventilated hydraulic brake, 38.5-inch ski stance and a 12 gal. fuel tank.
• Heat Red paint, new graphics, new two-color seat design.

PHAZER MOUNTAIN LITE

Riders who want a lightweight, agile mountain sled that floats in deep snow should head straight for the Phazer Mountain Lite. Its unique design, powerful engine and long track have been riding in the deep stuff for years. Here's what you'll find on the Phazer Mountain Lite:

• Proven 485 cc fan-cooled twin-cylinder engine.
• Plastic ski skins, plastic belly pan protector.
• 136-inch Mountain Master Track that handles deep powder and hard-packed trails.
• Smooth, efficient YVX Clutch System.
• Adjustable rear-suspension mounts for additional chassis clearance.
• Speedometer, tachometer, odometer, trip meter, fuel gauge, oil gauge, hand and thumb warmers and an 8.2 gallon fuel tank.
• Heat Red color and new graphics.

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