Segment:
Lightweight dual-sport / off-road motorcycle.
Target Audience:
Enthusiasts, owners, and mechanics seeking to maintain, repair, and restore the 1972 Suzuki RV125.
Competitors:
Competed against other lightweight dual-sport bikes from manufacturers like Yamaha (e.g., DT series), Honda (e.g., SL series), and Kawasaki (e.g., G series) in the early 1970s.
Design:
The RV125 was known for its rugged construction, tractable 2-stroke engine, and suitability for both on-road commuting and light off-road trail riding.
Engine:
Complete engine disassembly, assembly, inspection, and repair procedures for the 125cc 2-stroke engine.
Fuel System:
Carburetor tuning, cleaning, rebuilding, fuel tank, fuel lines, and fuel petcock maintenance.
Ignition System:
Ignition coil, points, condenser, spark plug, timing adjustments, and troubleshooting.
Transmission:
Gearbox disassembly, assembly, inspection, lubrication, and shift mechanism adjustments.
Clutch:
Clutch operation, adjustment, and component replacement.
Drivetrain:
Chain drive, sprockets, rear axle, and wheel hub maintenance.
Suspension:
Front fork disassembly, seal replacement, oil levels, rear shock absorber inspection, and replacement.
Brakes:
Drum brake system inspection, adjustment, lining replacement, and cable lubrication.
Electrical System:
Wiring diagrams, lighting systems (headlight, taillight, brake light, turn signals), horn, and battery maintenance.
Cooling System:
Air-cooled engine cooling fins cleaning and inspection.
Chassis:
Frame inspection, steering head bearing maintenance, and general chassis components.
Bodywork:
Fender, tank, seat, and panel removal, installation, and basic care.
Routine Maintenance:
Oil changes (where applicable for gear oil), spark plug checks, chain lubrication, air filter cleaning, and general lubrication points.
Troubleshooting:
Diagnostic charts and procedures for common starting, running, and performance issues.
Rebuilding:
Detailed step-by-step instructions for engine, carburetor, and gearbox overhauls.
Adjustments:
Carburetor jetting, ignition timing, brake cable tension, clutch free play, and chain tension.
Inspection:
Visual inspection guidelines for all major components and wear items.
Replacement:
Instructions for replacing wear items like brake pads, spark plugs, cables, and gaskets.
Depth:
Comprehensive, covering everything from basic maintenance to complete engine and transmission rebuilds.
Diagnostic Capabilities:
Detailed troubleshooting guides for identifying and resolving mechanical and electrical faults.
Part Identification:
May include exploded diagrams for part identification and order, crucial for vintage parts.
Type:
2-stroke, single-cylinder, air-cooled
Displacement:
125cc (approximate, actual may vary slightly based on bore/stroke)
Bore X Stroke:
Specifications would be detailed in the manual, likely around 56.0 mm x 50.6 mm.
Compression Ratio:
Detailed in manual, typical for 2-strokes of the era.
Horsepower:
Estimated 10-12 HP (actual figures to be confirmed in manual).
Torque:
Specifications would be detailed in the manual.
Carburetor Model:
Likely a Mikuni VM or similar carburetor, size specifications in manual.
Fuel Type:
Unleaded gasoline mixed with 2-stroke oil (premix or oil injection system, manual would clarify).
Type:
2-stroke oil mixture or separate oil injection system (manual to confirm).
Length:
Specifications would be detailed in the manual.
Width:
Specifications would be detailed in the manual.
Height:
Specifications would be detailed in the manual.
Dry Weight:
Likely in the range of 90-100 kg (approximate, actual figures in manual).
Gross Weight Rating:
Specifications would be detailed in the manual.
Tank Capacity:
Likely around 8-10 liters (specifications in manual).
Oil Change:
Gearbox oil change intervals specified in the manual, typically every few thousand miles or annually.
Spark Plug:
Spark plug inspection and cleaning/replacement intervals are critical for 2-stroke performance, detailed in the manual.
Chain Maintenance:
Regular cleaning, lubrication, and tension adjustment are crucial, with specific intervals provided.
Air Filter:
Cleaning and re-oiling (if applicable) of the air filter at regular intervals.
Gear Oil:
Specific SAE viscosity grade (e.g., SAE 80W/90 GL-4) and capacity for the transmission, detailed in the manual.
2 Stroke Oil:
Recommendations for 2-stroke oil type and mixing ratio (if premix) or type for oil injection system.
Fork Oil:
Type and viscosity of fork oil required for the front suspension, and specific fill levels.
2 Stroke Wear:
Common wear items in 2-stroke engines include piston rings, cylinder bore, and crankshaft seals. The manual addresses inspection and replacement.
Carburetor Clogging:
Fuel varnish and debris can clog carburetors; regular cleaning and proper fuel storage are important, covered in the manual.
Ignition Component Failure:
Points, condensers, and coils can degrade over time. The manual provides testing procedures.
