Target Audience:
Enthusiasts, DIY mechanics, professional motorcycle technicians.
Value Proposition:
Provides professional-level repair and maintenance guidance, saving owners time and money compared to dealership service.
Illustrations:
Clear and detailed illustrations and diagrams for each procedure.
Specifications:
Complete technical specifications, including torque values, fluid types, and clearances.
Accessibility:
Instant download and digital format for immediate access and ease of use.
Covered Years:
1987, 1988, 1989, 1990, 1991, 1992, 1993
Model Variants Covered:
All TZR125 variants within the specified production years.
Estimated Page Count:
Refer to manual for exact count (typically 200-400 pages for comprehensive workshop manuals).
Type:
Workshop Repair Service Manual
Engine:
Complete engine disassembly, assembly, tuning, and troubleshooting.
Transmission:
Gearbox inspection, repair, and clutch service.
Fuel System:
Carburetor overhaul, fuel tank and pump maintenance.
Cooling System:
Radiator, fan, thermostat, and coolant flow diagnostics.
Electrical System:
Wiring diagrams, ignition system, charging system, lighting, and starter motor.
Brakes:
Brake caliper overhaul, disc inspection, hydraulic system bleeding, and pad replacement.
Suspension:
Front fork service, rear shock absorber maintenance, and linkage lubrication.
Chassis:
Frame inspection, steering head bearing service, and swingarm maintenance.
Bodywork:
Fairing removal/installation, seat service, and panel alignment.
Routine Maintenance:
Oil changes, filter replacements, chain adjustment, spark plug checks.
Troubleshooting:
Diagnostic procedures for common starting, running, and electrical issues.
Rebuilds:
Detailed instructions for engine and transmission rebuilds.
Adjustments:
Carburetor synchronization, valve clearance adjustments (if applicable for 2-stroke), brake lever adjustments.
Installation:
Guidance on installing specific components and accessories.
Depth:
Comprehensive, from basic maintenance to complete engine rebuilds and advanced diagnostics.
Engine Type:
Liquid-cooled, 2-stroke, reed valve induction
Displacement:
124 cc (approx.)
Bore X Stroke:
Refer to manual for exact specifications (e.g., 56.5 mm x 47.4 mm).
Compression Ratio:
Refer to manual for exact specifications.
Horsepower Output:
Refer to manual for specific year/market output (typically in the 20-30 HP range).
Torque Output:
Refer to manual for specific year/market torque figures.
Carburetor Type:
Mikuni VM series (specific model varies by year/market, e.g., VM26SS).
Fuel Type:
Unleaded gasoline
Oil Mixing:
Pre-mix or Autolube system (check manual for specific model designation).
Overall Length:
Refer to manual for specific year.
Overall Width:
Refer to manual for specific year.
Overall Height:
Refer to manual for specific year.
Dry Weight:
Refer to manual for specific year (typically around 120-130 kg).
Wet Weight:
Refer to manual for specific year.
Oil Change Interval:
Refer to manual for recommended intervals (typically every 3,000-5,000 km or annually).
Spark Plug Replacement:
Refer to manual for recommended intervals (e.g., every 6,000-10,000 km).
Chain Lubrication Adjustment:
Recommended every 500-1000 km or after riding in wet conditions.
Engine Oil Type:
Refer to manual; typically a high-quality 2-stroke motorcycle oil for autolube or pre-mix.
Coolant Type:
Ethylene glycol-based coolant (refer to manual for specific mixture ratio).
Brake Fluid Type:
DOT 3 or DOT 4 (refer to manual for exact specification).
Common Wear Items:
Piston rings, clutch plates, reed valves, fork seals, and electrical connections.
Carburetor Performance:
Can be sensitive to altitude and temperature; requires proper tuning.
2-Stroke Engine Care:
Proper oil/fuel mixture and avoiding prolonged idling are crucial for longevity.
Manufacturer:
Yamaha Motor Corporation, a global leader in motorcycles and musical instruments.
Tzr Lineage:
Part of Yamaha's TZR series, known for its sporty 2-stroke performance and racing-inspired styling.
Manufacturing Era:
The late 1980s and early 1990s were a peak time for innovative 125cc 2-stroke sportbikes.