Segment:
Competition Motocross (MX) / Off-Road Motorcycles.
Competitors:
Honda CR85R/CR125R, Yamaha YZ85/YZ125, Suzuki RM85/RM125, KTM 85 SX/125 SX.
Vehicle Focus:
High-performance, lightweight, two-stroke off-road racing motorcycles designed for youth and amateur competition.
Utility:
To empower owners and mechanics with the knowledge to maintain, repair, and optimize the performance of their Kawasaki KX85 and KX100 motorcycles.
Primary Coverage:
Full service, repair, maintenance, rebuild, refurbishment, restoration.
Estimated Pages:
Estimated 300-500+ pages (typical for comprehensive service manuals).
Type:
Full Service Repair Manual
Language:
English (Assumed, standard for most aftermarket manuals).
Format:
Likely Digital (PDF) based on typical online sales, but could be printed.
Engine:
Complete engine disassembly, assembly, tuning, top-end, bottom-end, lubrication, cooling (if applicable), fuel delivery.
Transmission:
Clutch, gearbox, shift mechanism, lubrication.
Chassis:
Frame, subframe, suspension (forks, shock absorber), steering, wheels, tires, braking system (front and rear), chain drive, footpegs, controls.
Electrical:
Ignition system, lighting, wiring diagrams, component testing, troubleshooting.
Fuel System:
Carburetor (type and model specific), fuel lines, fuel tank.
Maintenance:
Regular servicing, oil changes, filter replacements, spark plug service, chain adjustment, brake bleeding, air filter cleaning/replacement.
Repair:
Component replacement (e.g., pistons, rings, valves, bearings, seals, cables, brake pads, levers), common wear item repair.
Troubleshooting:
Diagnostic procedures for common problems, identification of faulty components.
Rebuilds:
Complete engine rebuild, transmission overhaul, suspension fork rebuild.
Depth:
Comprehensive, covering everything from basic routine maintenance to complete engine and chassis overhauls. Includes detailed diagrams and specifications.
Digital Format:
PDF (likely), potentially with searchable text and high-resolution images.
Image Resolution:
High resolution for diagrams and illustrations, ensuring clarity.
Binding:
N/A (if PDF); If printed, typically spiral-bound for lay-flat use in a workshop.
Paper Quality:
N/A (if PDF); If printed, usually on durable, glossy or semi-gloss paper.
Type:
Two-stroke, liquid-cooled, single-cylinder.
Kx100 Displacement:
99 cc
Bore Stroke Kx85:
48.5 mm x 45.8 mm
Bore Stroke Kx100:
52.5 mm x 45.8 mm
Horsepower Kx85 Approx:
~23-25 HP (at crankshaft, estimate for model year)
Horsepower Kx100 Approx:
~27-29 HP (at crankshaft, estimate for model year)
Torque Kx85 Approx:
~11-12 lb-ft (estimate for model year)
Torque Kx100 Approx:
~13-14 lb-ft (estimate for model year)
Carburetor Kx85:
Keihin PWK28 (typical specification)
Carburetor Kx100:
Keihin PWK35 (typical specification)
Fuel Type:
Unleaded gasoline, minimum 91 octane recommended for optimal performance.
Two Stroke Oil Mix:
Specified ratio (e.g., 50:1 or 40:1) with high-quality, JASO FD certified two-stroke premix oil.
Type:
6-speed constant mesh, return shift.
Options:
N/A (Performance motocross bikes typically have a single transmission configuration).
Clutch:
Wet, multi-disc, manual operation.
Gear Ratios:
Specific gear ratios for each speed would be detailed in the manual.
Final Drive:
Chain drive.
Length Kx85:
~1770 mm (approx. 69.7 in)
Length Kx100:
~1835 mm (approx. 72.2 in)
Width Overall:
~730 mm (approx. 28.7 in)
Height Seat Kx85:
~1045 mm (approx. 41.1 in)
Height Seat Kx100:
~1075 mm (approx. 42.3 in)
Ground Clearance:
Varies, typically over 300mm (approx. 12 in).
Wheelbase Kx85:
~1220 mm (approx. 48.0 in)
Wheelbase Kx100:
~1255 mm (approx. 49.4 in)
Curb Weight Kx85:
~70 kg (approx. 154 lbs) (without fuel)
Curb Weight Kx100:
~73 kg (approx. 161 lbs) (without fuel)
Fuel Tank Capacity:
~5.0 Liters (approx. 1.3 US gal)
Safety Certification:
Designed for closed-course competition. Not street legal. Safety features are performance-oriented.
Braking System:
Hydraulic disc brakes front and rear for powerful and controlled stopping.
Suspension Tuning:
Adjustable suspension components (rebound, compression) allow for tuning to rider preference and track conditions, enhancing control.
Chassis Design:
Rigid perimeter frame for stability and rider feedback.
Ergonomics:
Designed for optimal rider positioning and control during aggressive riding.
Oil Change:
Every 10-15 hours of riding, or annually. Detailed checks recommended more frequently.
Air Filter Cleaning:
After every few rides, or more frequently in dusty conditions. Critical for two-stroke engine longevity.
Spark Plug Inspection:
Every 5-10 hours of riding. Replace as needed.
Chain Tension:
Check and adjust before every ride, or as needed based on wear.
Engine Oil Type:
Dedicated two-stroke engine oil (JASO FD certified recommended). Capacity is very small and specific to the injection system.
Transmission Oil Type:
SAE 10W-30 API SE, SF, SG or SH engine oil (refer to manual for precise API rating and type).
Transmission Oil Capacity:
Approximately 0.65 Liters (refer to manual for exact capacity and fill level check procedure).
Coolant Type:
Permanent type anti-freeze coolant, mixed 50/50 with distilled water.
Common Wear Items:
Clutch plates, piston rings, top-end bearings, wheel bearings, steering stem bearings, chain and sprockets, brake pads, fork seals.
Carburetor Tuning:
Sensitivity to jetting changes based on altitude, temperature, and modifications. Requires proper tuning for optimal performance and engine health.
Two Stroke Maintenance:
Requires diligent adherence to oil mixing, air filter cleaning, and spark plug maintenance to prevent premature engine wear and seizure.
Kawasaki Motocross:
Kawasaki has a long and storied history in motocross racing, with legendary models like the KX series achieving numerous championship titles.
Kx Lineage:
The KX85 and KX100 are direct descendants of Kawasaki's successful larger displacement KX motocross bikes, scaled down for youth riders and smaller classes.
Manufacturing Location:
Typically manufactured in Japan.
Motocross Titles:
The KX85 and KX100 platforms have historically been highly competitive and successful in amateur and professional motocross racing classes, contributing to Kawasaki's overall racing prestige.
Industry Reviews:
Consistently praised for their powerful engines, agile handling, and robust construction in industry reviews and rider feedback.
Performance Standards:
Meets or exceeds the performance standards expected for competitive motocross machinery in its class.
