Historical Segment:
Lightweight dual-sport/scrambler motorcycle catering to off-road and casual street use.
Competitors:
Yamaha DT125, Honda SL125, Kawasaki G3SS/G4TR.
Design Philosophy:
Robust, simple, and reliable design for accessible off-road adventure and daily utility.
Target Audience:
Enthusiasts seeking to maintain and repair their vintage Suzuki RV125, DIY mechanics, restoration projects.
Primary Coverage:
Comprehensive repair, maintenance, and troubleshooting for the Suzuki RV125 (1976 model year).
Estimated Pages:
Varies by specific edition; typically between 200-400 pages for a factory service manual of this era.
Type:
Factory Service Repair Manual
Engine:
Detailed overhaul, inspection, tuning, lubrication, cooling, and component diagnostics.
Transmission:
Gearbox inspection, repair, clutch adjustment, and fluid specifications.
Fuel System:
Carburetor disassembly, cleaning, adjustment, fuel tank, and fuel line maintenance.
Electrical System:
Ignition system, lighting, charging system (stator, regulator), wiring diagrams, and component testing.
Chassis And Suspension:
Front fork overhaul, rear shock absorber service, frame inspection, and steering head bearing service.
Brakes:
Drum brake inspection, adjustment, and linkage maintenance.
Wheels And Tires:
Tire pressure recommendations, wheel bearing service, and spoke tensioning.
Bodywork And Trim:
Fender removal/installation, seat maintenance, and minor body panel adjustments.
Maintenance:
Regular service checks, lubrication points, filter replacement, spark plug servicing.
Troubleshooting:
Diagnostic procedures for common performance issues, starting problems, and electrical faults.
Repair:
Step-by-step instructions for disassembly, assembly, and repair of all major components.
Adjustment:
Carburetor tuning, brake adjustment, clutch cable adjustment, and suspension settings.
Diagnostics:
Component testing procedures, fault finding charts, and specifications for measuring parameters.
Depth:
Comprehensive; covers everything from basic owner maintenance to full engine and component overhauls.
Engine Type:
Two-stroke, single-cylinder, air-cooled
Displacement:
124 cc (approx. 7.5 cubic inches)
Bore X Stroke:
54.0 mm x 54.0 mm (approx. 2.13 in x 2.13 in)
Compression Ratio:
Typically around 6.8:1 to 7.2:1 (specific value in manual)
Horsepower:
Approximately 12-14 HP at 7,000-7,500 RPM (varies by tuning and market).
Torque:
Not typically quoted for this class of engine, but emphasis on low-end grunt.
Carburetor Model:
Likely a Mikuni VM series (e.g., VM26 or similar, specific in manual).
Fuel Type:
Unleaded gasoline (octane rating as specified in manual, likely 91 RON or equivalent).
Fuel Mixture:
Two-stroke oil mixed with gasoline (ratio specified in manual, typically 20:1 or 30:1).
Crash Test Ratings:
N/A (Motorcycles of this era did not undergo standardized crash testing).
Braking System:
Front and rear drum brakes.
Lighting:
Headlight, taillight, brake light, turn signals (market dependent).
Frame Construction:
Steel tube frame for rigidity and durability.
Oil Change Interval:
Engine oil should be checked frequently and changed as per manual recommendations, typically every 1000-2000 km or annually.
Spark Plug Service:
Inspect and clean/gap spark plug every 1000 km; replace as needed. (Specific plug type and gap in manual).
Air Filter Maintenance:
Clean or replace air filter element every 500-1000 km, depending on operating conditions.
Chain Lubrication:
Lubricate drive chain every 300-500 km and adjust tension as required.
Transmission Oil:
SAE 10W/30 or 10W/40 API GL-1 or GL-2 gear oil. (Capacity approx. 1.0-1.2 liters).
Fork Oil:
Specific viscosity and quantity will be detailed in the manual, typically SAE 10W fork oil.
Carburetor Gumming:
Common issue with older two-strokes; requires regular cleaning and fresh fuel. Fuel stabilizer recommended for storage.
Ignition Coil Failure:
Can degrade over time; troubleshooting involves checking resistance and spark output.
Worn Piston Rings:
Leads to loss of compression, blue smoke, and reduced power; requires engine top-end rebuild.
Clutch Slippage:
Can occur due to worn clutch plates or improper adjustment; manual details replacement procedure.
Suzuki Motorcycle History:
Suzuki, founded in 1909, began producing motorcycles in the 1950s and quickly established a reputation for innovative and high-performance machines, including lightweight off-roaders.
Rv Series Context:
The RV series, including the RV125, was Suzuki's foray into the popular dual-sport segment, offering versatility for both on-road and off-road use, often characterized by their distinctive styling and robust construction.
Production Period:
The RV125 was produced from the mid-1970s into the early 1980s, with the 1976 model being an early iteration.
