Segment:
Dual-sport / Off-road motorcycle
Target Audience:
Enthusiasts, mechanics, owners seeking to maintain and repair their KLX250R
Key Competitors:
Honda CRF250, Yamaha WR250R, Suzuki DR-Z250
Vehicle Focus:
Robust off-road capability with street-legal features (depending on exact trim/market)
Manual Value Proposition:
Essential guide for DIY maintenance and repair, saving costs and ensuring proper upkeep
Engine Mechanical:
Top end (cylinder, piston, valves), bottom end (crankshaft, connecting rod, bearings), timing system, lubrication system, cooling system (radiator, hoses, fan)
Fuel System:
Carburetor (Mikuni VM34SS likely), fuel tank, fuel lines, fuel pump (if applicable), fuel filter
Ignition System:
CDI ignition, spark plug, ignition coil, stator, wiring
Transmission Drivetrain:
Clutch operation, gear shifting mechanism, gear ratios, final drive (chain and sprockets), gearbox disassembly and assembly
Suspension:
Front forks (spring rate, damping, oil level, seals), rear shock absorber (pre-load, damping, linkage system), wheel bearings
Brakes:
Front and rear disc brakes, brake caliper overhaul, master cylinder, brake lines, brake fluid specifications, bleeding procedures
Electrical System:
Wiring diagrams, battery, charging system (stator, rectifier/regulator), lighting (headlight, taillight, turn signals), horn, fuses, switches
Chassis Frame:
Frame inspection, steering head bearings, swingarm bearings, footpegs, handlebars
Bodywork Trim:
Seat, fuel tank, fenders, side panels, graphics
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug service, air filter cleaning, brake checks
Engine Overhaul:
Top end rebuild (piston, rings, cylinder honing), bottom end rebuild (crankshaft, bearings), valve adjustment, timing chain replacement
Carburetor Service:
Disassembly, cleaning, adjustment, jetting information
Suspension Service:
Fork seal replacement, fork oil change, shock absorber service, linkage lubrication
Brake System Maintenance:
Brake pad replacement, caliper overhaul, master cylinder service, brake fluid flush and bleed
Electrical Troubleshooting:
Diagnostic procedures for starting, charging, lighting, and ignition systems, wiring harness repair
Wheel Tire Service:
Tire mounting and balancing, spoke tensioning, wheel bearing replacement
Depth:
Comprehensive: Covers routine maintenance to complete engine and chassis teardown and rebuild
Diagnostics:
Detailed troubleshooting guides with symptom-based diagnosis
Specifications:
Includes all critical torque values, clearances, fluid types, and capacities
Length:
Approx. 2,180 mm (verify with manual)
Width:
Approx. 815 mm (verify with manual)
Height:
Approx. 1,250 mm (verify with manual)
Wheelbase:
Approx. 1,425 mm (verify with manual)
Dry Weight:
Approx. 117 kg (verify with manual)
Curb Weight:
Approx. 127 kg (fully fueled, verify with manual)
Fuel Tank Capacity:
12 Liters (verify with manual)
Front Suspension Travel:
270 mm (typical for R model)
Rear Suspension Travel:
280 mm (typical for R model)
Front Tire Size:
80/100-21 51P (verify with manual)
Rear Tire Size:
110/100-18 64P (verify with manual)
Wheelbase Type:
Spoked wheels
Engine Oil Change:
Every 3,000 km or 6 months (typical for this era, verify with manual)
Air Filter Cleaning:
Every 1,000 km or 6 months (more frequently in dusty conditions)
Chain Adjustment Lubrication:
Every 500 km or as needed based on slack
Valve Clearance Check:
Every 6,000 km or 12 months (typical, verify with manual)
Engine Oil Type:
SAE 10W-40 API SE or SF (verify with manual for specific grade and specification)
Coolant Type:
Ethylene glycol-based antifreeze (50/50 mix with distilled water)
Brake Fluid Type:
DOT 3 or DOT 4 (verify with manual for specific type)
Fork Oil Type:
Specific viscosity and amount detailed in manual (e.g., SAE 10W)
Carburetor Performance:
Older Mikuni carburetors can sometimes experience wear in throttle shafts or diaphragm issues, leading to inconsistent idle or throttle response. Proper cleaning and adjustment are key.
Suspension Seals:
Fork seals and dust wipers can degrade over time, leading to oil leaks. Regular inspection and replacement are recommended.
Cam Chain Tensioner:
While generally robust, the cam chain tensioner mechanism can sometimes require adjustment or replacement on high-mileage examples to prevent rattling.
Electrical Connectors:
Corrosion or loose connections in the electrical harness can lead to intermittent issues with lighting or ignition.