1986 Moto 4 Manual

The 1986 Moto 4 is a rugged ATV featuring a 229cc four-stroke engine, automatic clutch with 5-speed transmission, shaft drive system, front and rear suspension, electric start with backup recoil, front and rear racks, full floorboards, and dual headlights. Designed for utility and recreational use with a 400-pound load capacity. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

Features at a Glance

Key components: 229cc 4-stroke engine, automatic clutch with 5-speed transmission, shaft drive, front and rear suspension, electric start with backup recoil.

Feature	Description
Engine	229cc air-cooled 4-stroke single cylinder
Transmission	5-speed with automatic clutch
Drive System	Shaft drive
Suspension	Front: Independent double wishbone; Rear: Swingarm
Starting System	Electric start with backup recoil
Brakes	Front and rear drum brakes
Load Capacity	400 pounds total (rider + cargo)
Fuel Capacity	3.2 gallons
Tires	Front: 22x7-10; Rear: 22x10-10
Lighting	Dual headlights, taillight, brake light

Pre-Ride Inspection

Always perform pre-ride inspection before operating.

1. Check fuel level: Ensure adequate fuel for planned ride.
2. Inspect tires: Check pressure and condition for damage.
3. Test brakes: Verify front and rear brake operation.
4. Check controls: Ensure throttle, clutch, and steering move freely.
5. Verify lights: Test headlights, taillight, and brake light.
6. Check oil level: Verify engine oil is at proper level.

WARNING! Never operate without proper inspection. Failure to inspect may result in accident or injury.

Starting Procedure

Follow proper starting sequence for safe operation.

1. Park on level surface: Engage parking brake.
2. Check neutral: Ensure transmission is in neutral.
3. Turn fuel valve: Open fuel petcock to ON position.
4. Electric start: Turn key to ON, pull brake lever, press start button.
5. Recoil start (backup): Pull choke, pull starter cord firmly.
6. Warm up: Allow engine to warm up for 1-2 minutes before riding.

CAUTION! Always start in neutral with brake applied. Keep hands and feet clear of moving parts.

Specifications

• Engine: 229cc 4-stroke, air-cooled, SOHC
• Bore x Stroke: 70.0mm x 59.5mm
• Compression Ratio: 9.2:1
• Fuel System: Carburetor
• Transmission: 5-speed with automatic clutch
• Final Drive: Shaft
• Suspension Travel: Front: 5.1 in; Rear: 5.9 in
• Brakes: Front and rear drum
• Dimensions: L: 74.8 in, W: 42.5 in, H: 43.3 in
• Ground Clearance: 7.1 inches
• Dry Weight: 386 pounds

Controls and Operation

Main controls: Handlebar controls, foot controls, instrument panel.

Handlebar: Throttle, front brake lever, ignition switch, light switch, choke, start button.

Foot controls: Gear shift lever, rear brake pedal.

Instrument panel: Speedometer, odometer, neutral indicator, high beam indicator.

Operation: Start in neutral, select gear with shift lever, use automatic clutch for smooth engagement. Use both brakes for controlled stopping.

Maintenance Schedule

Regular maintenance ensures optimal performance and longevity.

1. After first 20 hours: Change engine oil and filter
2. Every 100 hours: Change engine oil, check valve clearance
3. Every 200 hours: Change final drive oil, clean air filter
4. Monthly: Check tire pressure, brake adjustment, chain tension
5. Seasonally: Grease fittings, check battery condition
6. Annually: Full inspection, replace spark plug

Tip: Keep maintenance records for reference and resale value.

Towing and Hauling

Maximum load capacity: 400 pounds total (rider + cargo).

1. Distribute weight evenly on front and rear racks.
2. Secure all cargo with straps or bungee cords.
3. Do not exceed maximum load capacity.
4. Reduce speed when carrying heavy loads.
5. Allow longer stopping distance with heavy loads.

WARNING! Overloading may cause loss of control and accident. Never exceed rated capacity.

Storage Guidelines

Proper storage prevents damage during periods of non-use.

1. Add fuel stabilizer to full fuel tank.
2. Change engine oil and filter.
3. Clean entire vehicle thoroughly.
4. Inflate tires to recommended pressure.
5. Disconnect battery or use battery tender.
6. Store in dry, covered location.

CAUTION! Never store with fuel in carburetor. Drain or run until empty.

Safety Information

Always wear helmet, eye protection, gloves, and protective clothing. Never operate on public roads. Avoid paved surfaces. Ride only in designated areas. Never carry passengers. Complete safety training before operation.

Regulatory Information

Manufactured to meet applicable safety standards. For off-road use only. Not for highway use. EPA certified. Copyright © 1986 Yamaha Motor Corporation. For support, contact authorized Yamaha dealer or Yamaha Customer Relations.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, compression	Check fuel level, spark plug, compression; verify choke operation.
Poor performance	Air filter, carburetor	Clean air filter; check carburetor settings; verify fuel flow.
Electrical issues	Battery, connections	Check battery charge; clean terminals; verify fuse condition.
Brake problems	Adjustment, wear	Adjust brake cables; inspect brake shoes for wear.
Transmission issues	Oil level, linkage	Check transmission oil; inspect shift linkage for damage.

Service: Contact authorized Yamaha dealer for professional service.

Parts: Use genuine Yamaha parts for optimal performance and safety.