🏷️ Basic Information

Make:

Suzuki

Model:

RV125

Year:

1972

Type:

Motorcycle

Generation:

N/A (Early Model)

Chassis Code:

Likely 'RV125A' or similar, specific factory documentation required for definitive chassis code.

Engine Code:

Likely 'T125' series engine, specific factory documentation required for definitive engine code.

👋 Introduction

Target Audience:

Mechanics and DIY enthusiasts seeking to maintain, repair, or restore the 1972 Suzuki RV125.

Value Proposition:

Provides essential, factory-accurate information crucial for preserving the functionality and historical integrity of the vintage Suzuki RV125, which was a capable trail/dual-purpose machine of its era.

Manual Accessibility:

Easy-to-read format with sequential steps, designed for practical application in a workshop environment.

Completeness:

Comprehensive coverage of all mechanical and electrical systems, essential for thorough repairs and maintenance.

📋 Manual Details

Systems Covered:

Engine, Transmission, Fuel System, Ignition System, Electrical System, Frame, Suspension (Front and Rear), Brakes (Front and Rear), Wheels and Tires, Controls, Bodywork, Lubrication, Troubleshooting.

Estimated Page Count:

Estimated 150-250 pages (typical for a factory service manual of this era).

Manual Type:

Factory Service Repair Manual

Language:

English

Format:

Digital (likely PDF), Print (if available)

📖 Manual Coverage

Engine:

Detailed disassembly, assembly, inspection, and repair of the 125cc two-stroke engine. Includes cylinder head, piston, rings, connecting rod, crankshaft, bearings, seals, cooling system (air-cooled), and all associated internal components.

Transmission:

Complete coverage of the gearbox, clutch assembly (likely wet multi-plate), shift drum and forks, bearings, and gear selection mechanism. Includes removal, inspection, and reassembly procedures.

Fuel System:

Carburetor (likely Mikuni or similar) disassembly, cleaning, adjustment, and rebuilding. Fuel tank, fuel lines, and petcock inspection and maintenance.

Ignition System:

Points ignition system details, including breaker point gap adjustment, timing procedures, coil testing, spark plug specifications, and wiring diagrams for the ignition circuit.

Electrical System:

Wiring diagrams for all circuits (lighting, horn, ignition, charging). Generator/alternator and rectifier/regulator inspection and testing, battery specifications, and component testing procedures.

Frame And Suspension:

Frame inspection for damage, front fork (telescopic) disassembly, seal replacement, oil levels, and spring specifications. Rear suspension (likely twin shock absorbers) inspection, mounting, and adjustment procedures.

Brakes:

Front and rear brake system details. Likely drum brakes for this era. Includes brake shoe inspection, adjustment, linkage maintenance, and cable routing.

Wheels And Tires:

Wheel bearing inspection and lubrication, spoke tension adjustment (if applicable), tire pressure recommendations, and wheel removal/installation.

Controls And Bodywork:

Handlebar assembly, throttle and clutch control cable adjustment, brake lever and pedal adjustments, seat removal, fender mounting, and basic body panel care.

Maintenance:

Regular service tasks such as oil changes (for gearbox), spark plug replacement, air filter cleaning/replacement, chain adjustment, lubrication points, and general inspection routines.

Troubleshooting:

Diagnostic guides for common starting issues, poor running, electrical problems, and braking performance issues. Likely presented in a symptom-cause-remedy format.

Repair:

Step-by-step instructions for component overhauls, replacements, and adjustments across all covered systems, enabling full repair capabilities.

Disassembly Assembly:

Comprehensive instructions for taking apart and putting back together all major motorcycle components and sub-assemblies.

Depth:

Covers everything from basic rider maintenance to in-depth engine and transmission rebuilds. Includes torque specifications, clearances, and critical measurements for accurate assembly.

📊 Manual Specifications

Digital Format:

PDF

Searchability:

Searchable text within the digital format allows for quick information retrieval.

Digital Reproduction Quality:

High-resolution scans ensuring clarity of diagrams and text.

Print Binding:

N/A (for digital, but if printed, typically comb-bound or saddle-stitched for ease of use)

Print Paper Type:

N/A (for digital, but typically printed on durable paper stock for workshop use)

⚙️ Engine Specifications

Engine Type:

Two-stroke, air-cooled, piston-ported single cylinder

Displacement:

124 cc (approximate, specific 'RV125' designation may vary slightly)

Bore X Stroke:

Typically around 54.0 mm x 54.0 mm (specifics to be confirmed by manual)

Compression Ratio:

Likely in the range of 7.0:1 to 7.5:1 (specifics to be confirmed by manual)

Horsepower Est:

Estimated 10-12 HP at approximately 7,000-8,000 RPM (typical for this displacement and era).

Torque Est:

Estimated 0.8-1.0 kgf-m (or 7.8-9.8 Nm) at approximately 6,000 RPM.

Carburetor Type:

Single Mikuni VM series or similar, likely 20-24mm bore diameter.

Fuel Type:

Unleaded gasoline with appropriate two-stroke oil pre-mix. Recommended octane rating typically 87-90.

Fuel Mixture Ratio:

Typically 20:1 or 25:1 (pre-mix ratio, to be confirmed by manual).

🔧 Transmission

Type:

5-speed constant mesh, sequential manual transmission.

Clutch Type:

Wet, multi-plate clutch operated by cable.

Gear Ratios:

Specific gear ratios will be detailed in the manual, essential for performance tuning and understanding power delivery.

Final Drive:

Chain drive, with manual specifying chain tension adjustment and lubrication.

📐 Dimensions

Overall Length Est:

Approx. 1900 mm - 2000 mm (typical for a bike of this class).

Overall Width Est:

Approx. 750 mm - 850 mm (handlebar width).

Overall Height Est:

Approx. 1050 mm - 1150 mm (to top of handlebars).

Wheelbase Est:

Approx. 1250 mm - 1300 mm.

Dry Weight Est:

Approx. 90 kg - 100 kg.

Fuel Tank Capacity:

Typically 6-8 Liters (specifics to be confirmed by manual).

🛡️ Safety Features

Safety Standards Era:

Meets 1970s motorcycle safety standards. Manual may highlight specific safety-related checks.

Braking System:

Front and rear drum brakes. Manual provides adjustment and maintenance for optimal performance.

Lighting System:

Headlight, taillight, brake light, turn signals (if equipped). Manual covers bulb types and wiring diagnostics.

Frame Integrity:

Manual details inspection procedures for frame cracks or damage, crucial for rider safety.

💡 Technology Features

Infotainment Features:

N/A (Vintage motorcycle with no electronic infotainment systems).

Assistance Features:

N/A (Vintage motorcycle with no electronic driver assistance features).

Connectivity Options:

N/A (Vintage motorcycle with no electronic connectivity).

🔧 Maintenance

Engine Oil Change Gearbox:

Recommended every 1000-2000 km or annually (specific interval in manual). Gearbox oil is separate from engine oil in 2-stroke).

Spark Plug Service:

Inspect and clean/replace every 1000-2000 km, or as needed based on performance.

Air Filter Service:

Clean and re-oil (if foam type) every 500-1000 km, depending on operating conditions.

Chain Maintenance:

Clean and lubricate every 300-500 km, adjust tension as needed.

Gearbox Oil Type:

API GL-4, SAE 80 or 90 gear oil. Manual will specify exact viscosity and capacity.

Fork Oil Type:

Specific motorcycle fork oil, likely SAE 10W or 20W. Manual will specify type and quantity per fork leg.

Carburetor Wear:

Pilot jets can clog, and needle wear can affect mixture. Manual provides adjustment procedures.

Ignition Points Wear:

Points can become pitted or drift, requiring adjustment or replacement for optimal spark.

Two Stroke Seals:

Crankshaft seals can degrade over time, leading to air leaks and poor running. Manual outlines seal replacement procedures.

Cable Stretch:

Throttle, clutch, and brake cables can stretch and require adjustment or replacement. Manual details adjustment methods.

📚 Vehicle History

Suzuki Motorcycle Division:

Suzuki has a long history of producing innovative motorcycles, from small-displacement commuters to high-performance sportbikes and off-road machines.

Rv Series Concept:

The RV series was designed for versatility, blending on-road usability with off-road capability, often featuring high-mounted exhaust and substantial suspension travel for its time.

Rv125 Context:

Introduced in the early 1970s, the RV125 was a popular choice for riders seeking an economical and capable machine for light trail riding and general transportation.

Production Period Est:

Likely produced in the early to mid-1970s. Specific production start/end dates for the 1972 model year are within the scope of the manual's context.

🏆 Awards & Recognition

Historical Reputation:

The Suzuki RV125 was generally well-regarded for its ruggedness and versatility in its class during its production era.

Owner Satisfaction Era:

Consistent with Suzuki's reputation for building reliable and practical machines for everyday use and recreation.

Manual Certification:

N/A (This refers to the quality and accuracy of the service manual itself, which is factory-produced).