1987 Yamaha Phazer Snowmobile Manual

The 1987 Yamaha Phazer is a lightweight, high-performance snowmobile featuring a 485cc two-stroke engine, Phazer I and Phazer II models, reverse capability, slide rail suspension, and advanced handling characteristics. This manual covers operation, maintenance, troubleshooting, and specifications for the 1987 model year. Below are key sections for safety, features, operation, maintenance, and technical specifications.

Features at a Glance

Key components: 485cc two-stroke engine, slide rail suspension, reverse gear, oil injection system, and lightweight chassis design.

Safety Precautions

Always wear proper safety gear and inspect snowmobile before operation.

1. Wear helmet, eye protection, and appropriate clothing
2. Check throttle and brake operation before riding
3. Inspect track and suspension components
4. Verify proper lighting and electrical functions
5. Ensure fuel and oil levels are adequate

WARNING! Never operate under influence of alcohol or drugs. Ride only in designated areas.

Controls and Operation

Familiarize yourself with all controls before operation.

1. Starting: Turn key to ON, set choke, press starter button or pull cord
2. Throttle: Right handlebar lever - squeeze to accelerate
3. Brake: Left handlebar lever - squeeze to engage brake
4. Reverse: Engage only when completely stopped
5. Emergency Stop: Pull tether cord to kill engine immediately

CAUTION! Allow engine to warm up before riding. Always use tether cord.

Specifications

• Engine Type: 485cc two-stroke, fan-cooled
• Bore x Stroke: 72mm x 59.6mm
• Compression Ratio: 7.2:1
• Carburetion: Dual VM34SS Mikuni
• Ignition: CDI electronic ignition
• Starting: Electric and manual pull start
• Fuel Capacity: 10.6 US gallons
• Oil Capacity: 3.2 quarts
• Track Length: 121 inches
• Track Width: 15 inches
• Overall Length: 104.5 inches
• Overall Width: 36 inches

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

Engine System

The 485cc two-stroke engine requires proper fuel mixture and regular maintenance.

1. Spark Plugs: NGK BR9ES, gap 0.024-0.028 inches
2. Compression: Minimum 100 psi, equal in both cylinders
3. Cooling: Ensure cooling fins are clean and unobstructed
4. Oil Injection: Use Yamalube 2-stroke oil or equivalent
5. Carburetor Adjustment: Pilot screw 1-1/4 turns out

Tip: Always use fresh fuel and proper oil mixture for optimal performance.

Fuel System

Dual Mikuni carburetors provide precise fuel delivery.

1. Fuel Type: Regular unleaded gasoline (87 octane)
2. Fuel Filter: Replace annually or every 1,000 miles
3. Carburetor Cleaning: Remove and clean every 2,000 miles
4. Fuel Lines: Inspect for cracks or deterioration
5. Fuel Tank: Keep at least 1/4 full to prevent condensation

WARNING! No smoking near fuel. Work in well-ventilated area.

Electrical System

12-volt electrical system with CDI ignition.

1. Battery: 12V 18Ah, maintain proper charge
2. Spark Plugs: Replace every 500 miles or as needed
3. Headlight: 45/45W halogen, adjust aim as needed
4. Voltage Regulator: Check if lights flicker or dim
5. Starter: Engage only when engine is not running

Suspension and Steering

Slide rail suspension provides excellent handling in various conditions.

1. Front Suspension: Double A-arm with springs
2. Rear Suspension: Slide rail with torsion springs
3. Steering: Direct linkage, check for play regularly
4. Ski Alignment: Toe-in 1/8 to 1/4 inch
5. Shock Absorbers: Check for leaks and proper damping

Track and Drive System

15-inch wide track with CVT transmission.

1. Track Tension: 1/2 to 3/4 inch deflection
2. Drive Belt: Yamaha belt 8DN-17641-00-00
3. Chain Case Oil: SAE 80W-90 gear oil
4. Drive Sprockets: Inspect for wear every 1,000 miles
5. Idler Wheels: Check bearings and replace if noisy

Troubleshooting

Service: Contact authorized Yamaha dealer for major repairs

Parts: Use genuine Yamaha parts for best performance