1988 Yamaha Terrapro Owners Manual

The 1988 Yamaha Terrapro is a rugged all-terrain vehicle designed for off-road use and utility applications. This 4-wheel ATV features a reliable 2-stroke engine, full-time 4WD system, rugged suspension, and versatile cargo capabilities. Below are key sections for safety, features, operation, maintenance, specifications, and troubleshooting.

1. Features at a Glance 2. Safety Information 3. Controls and Instruments 4. Specifications 5. Operation Procedures 6. Maintenance Schedule 7. Basic Maintenance 8. Storage Procedures 9. Troubleshooting 10. Warranty Information

Features at a Glance

Key components: 2-stroke air-cooled engine, Full-time 4WD system, Front and rear cargo racks, Electric start with backup pull start, Front and rear suspension, Dual hydraulic disc brakes.

Feature	Description
Engine Type	2-stroke, air-cooled, single cylinder
Drive System	Full-time 4WD with differential lock
Starting System	Electric start with auxiliary pull starter
Suspension	Independent front, swingarm rear
Brakes	Hydraulic disc front and rear
Cargo Capacity	Front: 30 lbs, Rear: 66 lbs
Fuel Capacity	3.2 gallons
Towing Capacity	Up to 400 lbs
Transmission	5-speed with reverse
Instrumentation	Speedometer, odometer, fuel gauge, warning lights

Safety Information

Always wear proper safety equipment and follow safe operating procedures.

Always wear DOT-approved helmet, eye protection, gloves, and protective clothing.
Never operate under the influence of alcohol or drugs.
Do not carry passengers - designed for operator only.
Avoid paved surfaces - not designed for road use.
Keep hands and feet away from moving parts.

WARNING! ATV operation requires skill and training. Always complete safety training course before operation.

Controls and Instruments

Familiarize yourself with all controls before operation.

Control	Function
Throttle Lever	Right handlebar - controls engine speed
Brake Lever	Left handlebar - front brake control
Brake Pedal	Right foot - rear brake control
Shift Lever	Left foot - 5-speed transmission with reverse
4WD Lever	Left handlebar - engages 4WD system
Diff Lock	Right handlebar - locks front differential
Choke Lever	Left handlebar - cold starting aid
Light Switch	Headlight and taillight control
Start Button	Electric starter activation
Kill Switch	Emergency engine shut-off

Specifications

Engine: 2-stroke, air-cooled, 246cc
Bore x Stroke: 68.0mm x 68.0mm
Compression Ratio: 6.6:1
Carburetor: Mikuni VM26SS
Ignition System: CDI
Transmission: 5-speed with reverse
Final Drive: Shaft drive
Suspension Travel: Front: 5.1 in, Rear: 5.9 in
Ground Clearance: 6.7 inches
Dry Weight: 462 lbs
Tires: Front: 22x11-8, Rear: 22x11-10
Fuel: Regular unleaded gasoline mixed with 2-stroke oil

Operation Procedures

Follow proper starting and operating procedures for optimal performance.

Pre-ride Inspection: Check tires, controls, lights, oil level, and fuel.
Cold Starting: Pull choke, shift to neutral, press start button.
Warm Starting: No choke needed, shift to neutral, press start.
Shifting: Always come to complete stop before shifting into reverse.
4WD Operation: Engage 4WD lever for slippery conditions.
Diff Lock: Use only when stuck or in extreme conditions.

CAUTION! Always allow engine to warm up before riding. Never operate without proper oil mixture.

Maintenance Schedule

Service Item	Initial	Every 3 mo	Every 6 mo	Every Year
Engine Oil	✓		✓
Gear Oil	✓		✓
Spark Plug			✓
Air Filter		✓
Brake Fluid			✓
Brake Pads		✓
Tire Pressure	✓	✓
Drive Shaft				✓
Wheel Bearings				✓

Basic Maintenance

Regular maintenance ensures long service life and reliable operation.

Oil Change: Use Yamaha 2-stroke oil at 20:1 ratio for break-in, 30:1 thereafter.
Air Filter: Clean with compressed air, replace if damaged.
Spark Plug: NGK B8ES, gap 0.024-0.028 inches.
Tire Pressure: Front: 3.6 psi, Rear: 3.6 psi (adjust for load/terrain).
Brake Adjustment: Check fluid level, pad wear, and lever free play.
Chain Adjustment: Maintain 0.8-1.2 inches of free play.

WARNING! Always perform maintenance in well-ventilated area. Use proper tools and safety equipment.

Storage Procedures

Proper storage prevents damage and ensures easy restarting.

Drain fuel tank and carburetor or add fuel stabilizer.
Change engine oil and filter.
Clean entire vehicle thoroughly.
Inflate tires to recommended pressure.
Remove spark plug and add teaspoon of oil to cylinder.
Store in dry, covered location with tires off ground.
Disconnect battery if equipped.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	No fuel, bad spark, flooded	Check fuel, spark plug, use choke properly
Poor performance	Clogged filter, bad plug	Clean air filter, replace spark plug
Hard shifting	Low oil, worn clutch	Check oil level, adjust clutch
4WD not engaging	Cable adjustment	Adjust 4WD engagement cable
Brakes dragging	Contaminated fluid	Bleed brakes, replace fluid
Electrical issues	Bad battery, loose wires	Check battery, inspect wiring

Service: Contact authorized Yamaha dealer for major repairs.

Warranty Information

Limited warranty coverage for 6 months from date of purchase. Coverage includes manufacturing defects in materials and workmanship. Normal wear items, abuse, modifications, and improper maintenance are not covered. Keep original sales receipt for warranty claims.

For warranty service, contact authorized Yamaha dealer with proof of purchase.