1986 Honda CMX250C Manual

The 1986 Honda CMX250C, also known as the Honda Rebel 250, is a cruiser-style motorcycle featuring a 234cc air-cooled parallel-twin engine, 5-speed transmission, electric start, front disc brake, rear drum brake, and a low seat height ideal for beginner riders. Below are key sections for safety, features, maintenance, operation, specifications, and troubleshooting.

1. Features at a Glance 2. Pre-Ride Inspection 3. Basic Operation 4. Specifications 5. Controls and Instrumentation 6. Maintenance Schedule 7. Engine and Transmission 8. Brakes and Suspension 9. Electrical System 10. Safety Information 11. Troubleshooting

Features at a Glance

Key components: 234cc parallel-twin engine, 5-speed transmission, cruiser styling, low seat height, electric start, front disc brake.

Feature	Description
Engine Type	234cc air-cooled 4-stroke parallel twin
Transmission	5-speed constant mesh
Starting System	Electric start with kick starter backup
Front Brake	Hydraulic disc brake
Rear Brake	Mechanical drum brake
Seat Height	27.2 inches (low profile)
Fuel Capacity	2.6 gallons
Weight	306 lbs (dry weight)
Frame Type	Steel double-cradle
Suspension	Telescopic front fork, dual rear shocks

Pre-Ride Inspection

Always perform safety check before riding.

Check fuel level: Ensure adequate fuel for planned ride.
Inspect tires: Check pressure and condition for wear/damage.
Test brakes: Verify front and rear brake operation.
Check lights: Test headlight, brake light, turn signals.
Verify controls: Ensure throttle, clutch, and brakes operate smoothly.

WARNING! Never ride with faulty brakes or tires. Always wear proper protective gear.

Basic Operation

Starting and riding procedures.

Starting: Turn ignition key ON, ensure neutral light illuminated, pull clutch lever, press start button.
Shifting: Use clutch lever to shift gears (1-N-2-3-4-5 pattern).
Braking: Apply both front and rear brakes simultaneously for maximum stopping power.
Parking: Use side stand on firm, level surface.

CAUTION! Allow engine to warm up before riding. Always use both brakes for stopping.

Specifications

Engine: 234cc air-cooled 4-stroke parallel twin
Bore x Stroke: 53.0mm x 53.0mm
Compression Ratio: 9.2:1
Fuel System: 22mm constant velocity carburetor
Ignition: CDI electronic ignition
Transmission: 5-speed constant mesh
Final Drive: O-ring chain
Front Tire: 3.00-18
Rear Tire: 130/90-15
Wheelbase: 57.5 inches
Fuel Capacity: 2.6 gallons

Controls and Instrumentation

Handlebar controls and dashboard functions.

Right Handlebar: Front brake lever, engine stop switch, start button, throttle grip.

Left Handlebar: Clutch lever, turn signal switch, headlight dimmer switch, horn button.

Instrument Panel: Speedometer, odometer, trip meter, neutral indicator, turn signal indicators, high beam indicator.

Ignition Switch: OFF/ON positions with steering lock capability.

Maintenance Schedule

Regular maintenance intervals for optimal performance.

Service Item	Every 600 mi	Every 4000 mi	Every 8000 mi
Engine Oil Change	✓	✓	✓
Oil Filter		✓	✓
Air Filter		Inspect	Replace
Spark Plugs		Inspect	Replace
Chain Adjustment	✓	✓	✓
Brake Fluid	Inspect	Replace	Replace
Tire Pressure	✓	✓	✓

Engine and Transmission

Engine maintenance and transmission operation.

Oil Change: Use SAE 10W-40 motorcycle oil, capacity 1.7 quarts with filter change.
Valve Clearance: Check every 4000 miles, intake 0.002-0.003 in, exhaust 0.003-0.004 in.
Carburetor: Adjust idle speed to 1200-1400 rpm.
Clutch: Adjust free play at lever to 10-20mm.

Tip: Always use motorcycle-specific oil, never automotive oil.

Brakes and Suspension

Brake system maintenance and suspension adjustment.

Front Brake: Check fluid level in reservoir, replace fluid every 2 years.
Rear Brake: Adjust free play at pedal to 20-30mm.
Front Suspension: Check fork oil level, replace every 2 years or 8000 miles.
Rear Suspension: Adjust preload to match load and riding conditions.

WARNING! Never use petroleum-based cleaners on brake components.

Electrical System

Battery, charging system, and lighting.

Battery: 12V 8Ah, maintain fluid level, keep terminals clean and tight.

Charging System: Three-phase alternator, output 14V 15A at 5000 rpm.

Fuses: Main fuse 15A, headlight fuse 10A, located under left side cover.

CAUTION! Disconnect battery negative terminal first when servicing electrical system.

Safety Information

Always wear DOT-approved helmet, eye protection, gloves, jacket, long pants, and sturdy footwear. Never ride under influence of alcohol or drugs. Obey all traffic laws. Complete motorcycle safety course recommended.

Troubleshooting

Symptom	Possible Cause	Corrective Action
Engine won't start	Fuel, spark, battery	Check fuel level, spark plug condition, battery charge.
Poor acceleration	Clutch, carburetor	Adjust clutch free play, clean carburetor jets.
Brakes feel spongy	Air in lines, worn pads	Bleed brake system, inspect brake pads.
Battery not charging	Stator, regulator	Test stator output, check regulator/rectifier.
Chain noise	Loose, dry chain	Adjust chain tension, clean and lubricate.

Service: Contact authorized Honda dealer for complex repairs.

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