The 1987 Yamaha Moto 4 350 is a four-wheel ATV featuring a 348cc four-stroke engine, automatic centrifugal clutch, shaft drive system, electric start with backup recoil, front and rear suspension, dual hydraulic drum brakes, reverse gear, and utility rack. This manual covers safety, operation, maintenance, specifications, and troubleshooting for proper ownership and care of your Yamaha Moto 4 350.
Key components: 348cc air-cooled four-stroke engine, automatic transmission with reverse, shaft drive, front and rear racks, full suspension system.
| Feature | Description |
|---|---|
| Engine | 348cc 4-stroke SOHC single cylinder |
| Transmission | Automatic centrifugal clutch with reverse |
| Drive System | Shaft drive |
| Starting System | Electric start with backup recoil |
| Brakes | Dual hydraulic drum brakes front and rear |
| Suspension | Independent front, swingarm rear |
| Fuel Capacity | 3.7 gallons (14 liters) |
| Load Capacity | 330 lbs (150 kg) including rider |
| Tires | AT22 x 11-8 front, AT22 x 10-10 rear |
| Dimensions | 76.8" L x 42.5" W x 43.3" H |
Always wear approved helmet, eye protection, gloves, long sleeves, long pants, and over-the-ankle boots.
WARNING! This ATV can be hazardous to operate. Always follow safety guidelines and receive proper training.
Handlebar controls: Throttle, brake levers, ignition switch, light switch, choke, starter button.
Instrument Panel: Speedometer, odometer, trip meter, neutral indicator, reverse indicator, high beam indicator.
Handlebar: Right side - throttle control, front brake lever; Left side - rear brake lever, light switch, choke knob. Center - ignition switch, starter button. Foot controls: Gear selector (F-N-R), brake pedal.
Starting procedure: Turn fuel valve ON, set choke for cold starts, turn ignition ON, shift to neutral, press starter button.
CAUTION! Allow engine to warm up before riding. Avoid sudden throttle movements.
Regular maintenance ensures optimal performance and longevity.
| Service Item | Every 100 mi | Every 500 mi | Every 1000 mi |
|---|---|---|---|
| Engine oil change | ✓ | ✓ | ✓ |
| Oil filter | ✓ | ✓ | |
| Air filter cleaning | ✓ | ✓ | ✓ |
| Spark plug | ✓ | ✓ | |
| Brake fluid | ✓ | ✓ | |
| Drive shaft lubrication | ✓ | ✓ | |
| Wheel bearing check | ✓ | ||
| Suspension inspection | ✓ | ✓ | ✓ |
Engine oil change: Warm engine, drain plug underneath, refill with SAE 10W-30, capacity 2.1 quarts.
Tip: Always use genuine Yamaha parts for optimal performance.
For long-term storage: Clean thoroughly, change oil, stabilize fuel, remove battery, store in dry location.
CAUTION! Do not store with fuel in carburetor; drain or use stabilizer. Keep battery charged during storage.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Engine won't start | Fuel, spark, compression | Check fuel valve, choke, spark plug, battery charge |
| Poor performance | Dirty air filter, carburetor | Clean air filter, check carburetor settings |
| Electrical issues | Battery, connections | Check battery voltage, clean connections |
| Brake problems | Fluid, adjustment | Check brake fluid level, adjust brake levers |
| Transmission issues | Linkage, fluid | Check shift linkage, transmission fluid level |
Service: Contact authorized Yamaha dealer for complex repairs.
Limited warranty: 6 months from date of purchase. Covers defects in materials and workmanship. Does not cover normal wear, improper maintenance, or accident damage. Keep purchase receipt for warranty claims. For warranty service, contact authorized Yamaha dealer.