1988 FLHTC Service Manual

The 1988 FLHTC (Electra Glide Classic) is a touring motorcycle featuring a 1340cc V-Twin Evolution engine, 5-speed transmission, full fairing with lowers, tour pack, AM/FM/cassette stereo, CB radio, cruise control, and comprehensive touring amenities. This service manual covers maintenance procedures, specifications, troubleshooting, and repair guidelines for the complete motorcycle system.

General Information

Overview of 1988 FLHTC features and service requirements.

Maintenance Schedule

Recommended service intervals for optimal performance.

1. Oil Change: Every 2,500 miles or 3 months
2. Primary Chain Adjustment: Every 5,000 miles
3. Spark Plugs: Replace every 10,000 miles
4. Brake Fluid: Change annually
5. Air Filter: Clean every 5,000 miles, replace as needed
6. Drive Belt: Inspect every 5,000 miles, adjust tension

WARNING! Always use Harley-Davidson recommended fluids and parts. Wear protective equipment during maintenance.

Engine Service

Evolution 1340cc engine maintenance and repair procedures.

1. Compression Test: Check cylinder compression (120-150 psi)
2. Valve Adjustment: Set intake and exhaust clearances
3. Timing: Set ignition timing with timing light
4. Carburetor: Adjust idle mixture and speed
5. Oil System: Change oil and filter, check for leaks

CAUTION! Engine must be cool before servicing. Use proper torque specifications.

Transmission

• Type: 5-speed constant mesh
• Oil Capacity: 1 quart (HD Formula+ recommended)
• Shift Mechanism: Foot shift with hand clutch
• Primary Drive: Chain with automatic tensioner
• Clutch: Multi-plate wet clutch
• Final Drive: Belt drive system

Electrical System

12-volt electrical system with charging, starting, and accessory circuits.

Components: Battery (12V 28AH), Alternator (32 amp), Starter motor, Voltage regulator, Ignition system (breakerless electronic), Lighting, Instruments, Stereo/CB system.

Testing: Use multimeter for voltage checks. Battery should show 12.6V static, 13.5-14.5V running. Check all fuses and connections for corrosion.

Fuel System

CV carburetor with electric choke operation and maintenance.

1. Fuel Tank Capacity: 5 gallons
2. Carburetor: Keihin CV 40mm
3. Fuel Filter: Replace every 10,000 miles
4. Fuel Lines: Inspect for cracks and leaks
5. Choke: Electric choke operation check

Tip: Always use fresh gasoline and stabilizer for storage.

Brakes

Hydraulic disc brake system service procedures.

1. Brake Pads: Inspect thickness, replace if under 1/8"
2. Brake Fluid: DOT 4, change every 2 years
3. Brake Lines: Inspect for wear and damage
4. Calipers: Clean and lubricate sliding pins
5. Master Cylinder: Check fluid level and operation

WARNING! Test brakes after service. Never reuse brake fluid.

Suspension

Front fork and rear shock maintenance and adjustment.

Front Fork: Oil change every 20,000 miles, seal replacement as needed. Rear Shocks: Air pressure adjustment (0-30 psi), preload settings. Steering Head Bearings: Check for play, adjust torque.

Troubleshooting

Reset: Disconnect battery for 30 minutes to reset electronic modules.

Specifications

• Engine: 1340cc (81.8 cu in) V-Twin
• Bore x Stroke: 3.498" x 4.250"
• Compression: 8.5:1
• Fuel Capacity: 5.0 gallons
• Oil Capacity: 3.0 quarts (with filter)
• Transmission Oil: 1.0 quart
• Primary Chaincase: 1.0 quart
• Battery: 12V 28AH
• Tire Sizes: Front: MT90B16, Rear: MU85B16

Wiring Diagrams

Complete electrical schematics for main harness, lighting, ignition, and accessory systems. Color-coded wiring with connector locations and pin assignments. Includes stereo/CB wiring and cruise control circuits.

Service: Contact authorized Harley-Davidson dealer for technical support and genuine parts.