2007 Yamaha Phazer Mountain Lite

Mountain Performance

Jul. 01, 2006 By


2007 Phazer Mountain Lite

Genesis 80FI™
The Phazer Mountain Lite uses a new 2-cylinder 500cc engine for its performance. The engine package is based on the YZ250F™ engine. It’s actually two of them engineered together to become a new snowmobile engine. The Genesis 80FI is fuel injected, with a 5-valve head and makes its peak power at over 11,000 rpm.

Lightweight, counterbalanced crankshaft
The Genesis 80FI engine’s crankshaft is designed to be light weight, responsive and durable. The lightweight, counterbalanced crankshaft delivers super-crisp throttle response and quick acceleration. It also helps mitigate the vibration inherent in a 2-cylinder engine.

Advanced fuel injection
The Genesis 80FI uses a new, advanced fuel injection system to control fuel flow to the engine. Consumers will enjoy the engine’s spot-on performance and throttle response as a result of the advanced electronic fuel injection system.

2-into-1 rear exhaust
The exhaust from the Genesis 80FI is routed out the rear of the sled, similar to the Genesis 120™ and Genesis 150FI™ engine packages. The rear exiting exhaust design serves three purposes. First, it keeps the exhaust heat out of the engine bay to allow a super-compact design. Second, it allows the engine to breathe more efficiently and through a cooled exhaust pipe. Finally, it helps to balance the overall sled package, giving the Phazer its amazingly nimble handling.

14x144x2-inch Camoplast Maverick track
The Phazer Mountain Lite uses a new 14-inch wide Camoplast Maverick track with 2-inch lugs. The new track design is lighter for improved performance and handling. It also allows the tunnel to be narrower to improve the sled’s ergonomics.

In order to generate consistently-strong engine performance, all Genesis 80FI sleds feature a small radiator on the right hand side of the engine cab. The use of a small radiator improves the sled’s cooling system function, which means greater engine durability. It also enhances the sled’s handling by relocating the mass of a rear heat exchanger up to the central portion of the sled.


Ultra light, ultra rigid FX™ chassis
The Phazer Mountain Lite is built on a new platform, the FX chassis. It features lightweight, rigid CF die cast member and chromoly tube construction. The FX chassis was engineered specifically to house the Genesis 80FI engine and incorporates that engine package in its overall balance dynamic. The FX chassis is also the backbone for the new sport rider-forward position positioning on the Phazer Mountain Lite.

Sport rider-forward position
The Phazer Mountain Lite takes many of its cues from other off-road motorsports, including its sport rider-forward positioning. It has a tall, narrow seat and tall, forward handlebars like the popular YZ™ dirtbike. It puts the rider in a pure sport posture, ready for anything without being overly aggressive. The sport rider-forward position position also locates the mass of the rider right at the balance point for the sled, retaining its incredible balance.

Adjustable-width double wishbone front suspension
The FX chassis uses an all-new adjustable-width front suspension package to accommodate its unique weight distribution and handling needs. Because of the Phazer Mountain Lite’s naked front end design, the A-arms need to be longer than even the second generation design found on the Apex™ and Vector™-class models. There are also new spindles and a new sway bar for the chassis. Riders can adjust the ski stance from 37.6 to 39.6 inches.

Mountain skis
The saddleless plastic mountain ski is wider than a trail ski with a deep keel for excellent powder-handling characteristics. The unique arched fin design of the ski aids in powder handling and also deflects snow away from the sled and the driver.

Integrated chaincase with magnesium cover
The FX chassis has the chaincase cast right into the frame member, and has a magnesium cover plate that forms the seal to keep the oil in. This trick piece of technology is a highlight of the goal to simplify the sled and eliminate weight. Riders will appreciate the reduced overall weight on the Phazer Mountain Lite and its amazingly nimble handling as a result.

CF die cast construction
Yamaha’s Controlled Flow casting technique is used for many of the structural pieces on the chassis. The CF process draws the molten metal into the mold under a vacuum, minimizing the formation of air bubbles in the material. As a result, pieces can be made much thinner and still deliver the strength characteristics of a conventionally cast, thicker piece. Yamaha started using the CF process on the 2003 RX-1™.



ProMountain™ 144 rear suspension
The Phazer Mountain Lite uses a second generation ProMountain rear suspension. The FX chassis uses a narrow track and the skidframe is accordingly narrower. The suspension offers a number of unique features, in addition to the narrowness. The carrier wheels on the rear upper cross shaft are oversized to improve their efficiency and reduce friction. The rear mount is built with a cantilever system to allow the track tension to remain consistent through the compression travel. The rear arm has coupling blocks. The front lower shock mount is on a cam to increase the shock rate through its travel.

Tall, narrow YZ-style seat
The tall, narrow seat is an integral element in the sport rider-forward position position on the Phazer Mountain Lite. It helps put the rider in the best possible location for aggressive or casual riding. The narrowness of the seat enhances the sled’s overall lightweight feel on the trail.

Standard electric start and push button Electric Shift reverse
Yamaha’s electric starter system allows consumers to fire up their Phazer Mountain Lite with a turn of the key. The engine’s decompression system lightens the load required to turn the engine over, resulting in a smaller, lighter battery. Yamaha's new Electric Shift reverse system lets users to shift the sled into, and out of, reverse with the touch of a button on the digital gauge.

Digital gauge
The new digital gauge displays key information at a glance. Vehicle speed is displayed on a large LCD readout either in miles or kilometers per hour. In addition, the rider can select either tachometer, odometer or tripmeter data to appear on secondary readout. The gauge also displays system warning lights, fuel level and warmer intensity. The right hand side of the gauge has the push button for the Electric Shift reverse system.

Hand and thumb warmers
The hand and thumb warmers on the Phazer Mountain Lite use a new kind of control from the other Yamaha models. Instead of dual controllers, the Phazer Mountain Lite’s warmers use a single rocker button on the left side control pod. It operates like a volume wheel, cycling all the way up, then starting over at low for each warmer.

Wide runningboards with traction
The Phazer Mountain Lite is all about fun and handling. As a result, the runningboards are nice and wide and loaded with traction. Riders will be able to put their feet anywhere on the runningboards and have more confidence in their traction. This allows the rider to move around and really enjoy the full fun of a lightweight sled.


Type / Displacement / ccFour-stroke, 499cc
Bore & Stroke / mm77.0 x 53.6mm
Intake Design3 Valves
IgnitionDigital T.C.I. with Throttle Position Sensor
CarburetionFuel Injection, 43mm Throttle Bodies
ExhaustRear Exhaust
Clutch / Transmission YPZ, Variable Ratio, Electronic Shift
Disc. Brake Type 2-Piston Hydraulic w/Lightweight Rotor


Front SuspensionIndependent, Double Wishbone
Front ShocksGas Cell Hydraulic
Front Travel / in.8.5"
Ski TypeLightweight Plastic, Saddleless Design
Carbide Ski RunnersStandard
Stabilizer BarStandard, Linear Ratio
Rear SuspensionPro Mountain™ Dual Angle
Rear ShocksGas Cell Hydraulic
Rear Travel / in.15.5"

Overall Length / in.125.8"
Overall Width / in.46"
Overall Height / in.46.9"
Track/Width x Length x Height / in.14" x 144" x 2.0" Camoplast Maverick
Estimated Dry Weight514 lbs.
Ski Stance (ctr. to ctr.) in.37.6-39.6"
Fuel Capacity / Gal.8.1
Fuel TypeRegular Unleaded
Oil Capacity / Qts.N/A
Engine Oil TypeYamalube 4, 0w-30, Cold Weather Formula

Electric StartStandard
Hand & Thumb Warmers10 Position, Adjustable, Seperate
Windshield Height Tall
Mirrors N/A
Seating Capacity One
Backrest N/A
Rear Carrier Rack N/A
Tow HitchN/A
Tunnel ProtectorsN/A
Headlight Watts, Type60/55W Halogen x 2
High Beam IndicatorStandard
Oil & Temp LightStandard
Fuel Gauge TypeElectric (LCD), Low Fuel Warning Light
SpeedometerStandard (LCD, Digital)
OdometerStandard (LCD)
Tripmeter Standard (LCD)
TachometerStandard (LCD)
DC OutletOptional
Warranty 1 Year (Limited Factory Warranty)

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