1988 Suzuki Quadrunner 250 Manual

The 1988 Suzuki Quadrunner 250 is a reliable four-wheel ATV featuring a 246cc four-stroke single-cylinder engine, automatic transmission with high/low range, shaft drive, front and rear suspension, dual hydraulic drum brakes, electric start with backup recoil, full instrumentation, and rugged off-road capabilities. Below are key sections for safety, features, operation, maintenance, and troubleshooting.

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

Features at a Glance

Key components: 246cc four-stroke engine, automatic transmission with high/low range, shaft drive system, full instrumentation, electric start with recoil backup.

Feature	Description
Engine	246cc four-stroke, air-cooled single cylinder
Transmission	Automatic CVT with high/low range selection
Drive System	Shaft drive to rear wheels
Starting System	Electric start with manual recoil backup
Brakes	Dual hydraulic drum brakes front and rear
Suspension	Front telescopic forks, rear swingarm
Instrumentation	Speedometer, odometer, fuel gauge, neutral indicator
Fuel Capacity	3.2 gallons (12 liters)
Load Capacity	330 lbs (150 kg) including rider
Tires	Front: 22x11-8, Rear: 22x12-8

Safety Information

Always wear proper safety gear and follow operating guidelines.

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 single rider only.
Avoid paved surfaces - not designed for street use.
Keep hands and feet away from moving parts during operation.

WARNING! ATV can be hazardous to operate. Never allow children under 16 to operate. Always complete safety training course.

Controls and Instruments

Familiarize yourself with all controls before operation.

Handlebar Controls: Throttle lever, brake lever, ignition switch, light switch, choke, starter button.

Instrument Panel: Speedometer, odometer, trip meter, fuel gauge, neutral indicator, high beam indicator. Transmission: Forward/Neutral/Reverse with high/low range selector.

Specifications

Engine Type: 246cc, 4-stroke, air-cooled, SOHC
Bore x Stroke: 72.0 x 60.4mm
Compression Ratio: 9.2:1
Fuel System: Mikuni VM24SS carburetor
Ignition System: CDI electronic ignition
Transmission: Automatic CVT with high/low range
Final Drive: Shaft drive
Suspension Front: Telescopic forks, 5.9" travel
Suspension Rear: Swingarm, 5.9" travel
Brakes: Hydraulic drum front and rear
Dimensions (LxWxH): 76.8" x 42.5" x 43.3"
Dry Weight: 386 lbs (175 kg)

Operation Instructions

Starting and operating procedures for normal conditions.

Pre-ride inspection: Check tires, controls, lights, oil level, fuel.
Starting: Turn fuel valve ON, set choke for cold starts, shift to neutral, pull brake lever, press starter button.
Warm-up: Allow engine to warm for 2-3 minutes before riding.
Riding: Select appropriate range (high/low), accelerate smoothly, use both brakes for stopping.
Shutdown: Shift to neutral, turn off ignition, turn fuel valve OFF.

CAUTION! Always use both brakes together. Avoid sudden acceleration or braking.

Maintenance Schedule

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 inspection	✓	✓	✓
Drive shaft oil			✓
Wheel bearing check		✓	✓
CVT belt inspection		✓	✓

Basic Maintenance Procedures

Essential maintenance tasks for proper ATV care.

Engine oil change: Warm engine, drain oil, replace filter, refill with 10W-40.
Air filter service: Remove foam element, clean in solvent, re-oil with filter oil.
Spark plug: Clean and gap to 0.024-0.028 inches, replace if worn.
Tire pressure: Maintain 3.5 psi front, 3.5 psi rear for normal riding.
Brake adjustment: Check lever travel, adjust if excessive play exists.

Tip: Always use genuine Suzuki parts for optimal performance.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, compression	Check fuel valve, choke position, spark plug, battery charge.
Poor performance	Dirty air filter, carburetor	Clean air filter, check carburetor settings, fuel quality.
Transmission slipping	Worn CVT belt	Inspect CVT belt for wear, replace if cracked or glazed.
Electrical issues	Battery, connections	Check battery voltage, clean terminals, test charging system.
Brakes weak	Air in lines, worn pads	Bleed brake system, inspect brake pads for wear.

Reset: Disconnect battery for 30 seconds to reset electrical system if needed.

Storage Guidelines

Proper storage procedures for seasonal or long-term storage.

Fuel system: Add fuel stabilizer, run engine for 5 minutes, or drain completely.
Battery: Remove and store on trickle charger, or disconnect negative terminal.
Tires: Inflate to proper pressure, elevate off ground if possible.
Cleaning: Wash thoroughly, apply protectant to plastic and rubber components.
Cover: Use breathable cover to protect from dust and moisture.

CAUTION! Store in cool, dry place away from direct sunlight and moisture.

Warranty Information

1988 Suzuki Quadrunner 250 limited warranty: 12 months from date of purchase, covers defects in materials and workmanship. Warranty does not cover normal wear items, improper maintenance, accidents, or modifications. Contact authorized Suzuki dealer for warranty claims. Keep original purchase receipt for warranty validation.