The 1987 Kawasaki KX125 is a high-performance motocross motorcycle featuring a liquid-cooled 2-stroke 125cc engine, 6-speed transmission, Uni-Trak rear suspension system, and advanced chassis design for competitive racing. Below are key sections covering specifications, maintenance procedures, troubleshooting, and operational guidelines.
Technical specifications for the 1987 Kawasaki KX125 motocross motorcycle.
| Component | Specification |
|---|---|
| Engine Type | Liquid-cooled 2-stroke single cylinder |
| Displacement | 124cc |
| Bore x Stroke | 54.0 x 54.4mm |
| Compression Ratio | 8.4:1 |
| Carburetor | Keihin PE34 |
| Transmission | 6-speed constant mesh |
| Final Drive | 520 chain |
| Suspension Front | Air-adjustable telescopic fork |
| Suspension Rear | Uni-Trak system with adjustable preload |
| Brakes Front | Single disc |
| Brakes Rear | Single drum |
| Fuel Capacity | 2.1 gallons (8 liters) |
| Dry Weight | 194 lbs (88 kg) |
Detailed information about the 2-stroke engine components and maintenance procedures.
WARNING! Always use proper 2-stroke oil mixture to prevent engine damage.
Frame and suspension components with adjustment procedures.
CAUTION! Check suspension settings before each ride for optimal performance.
Recommended maintenance intervals for optimal performance.
Common issues and solutions for the KX125.
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| Hard starting | Fouled spark plug, improper fuel mixture | Replace spark plug, check fuel/oil ratio |
| Poor performance | Clogged air filter, carburetor issues | Clean air filter, adjust carburetor jets |
| Overheating | Low coolant, radiator blockage | Check coolant level, clean radiator fins |
| Transmission issues | Worn clutch, improper oil level | Inspect clutch plates, change transmission oil |
| Brake problems | Worn pads, air in lines | Replace brake pads, bleed brake system |
Keihin PE34 carburetor settings and adjustment procedures.
Tip: Adjust jetting based on altitude and temperature conditions.
CDI ignition and lighting system components.
Front disc and rear drum brake maintenance.
WARNING! Test brakes before each ride and replace worn components immediately.
Important safety information for operation and maintenance.
CAUTION! This is a competition vehicle - not designed for street use.
Limited warranty coverage and dealer network information.
Kawasaki Motors Corp., U.S.A. provides a 30-day limited warranty for competition use. Warranty covers manufacturing defects in materials and workmanship. Normal maintenance items, wear items, and damage from racing are not covered. For warranty claims, contact your authorized Kawasaki dealer with proof of purchase.