Model Variant:
90cc and 125cc Engine Variants
Production Years Covered:
1964-1975
Manual Product Name:
Hodaka 90 125 Service Repair Manual 1964-1975
Manual Product Description:
Service Repair Manual "Hodaka 90 125 1964-1975"
Target Audience:
Hodaka motorcycle owners and enthusiasts requiring detailed repair and maintenance information.
Value Proposition:
Provides essential, in-depth technical guidance for maintaining and restoring classic Hodaka motorcycles, covering a broad range of models and years.
Visual Documentation:
Hundreds of high-quality photographs and detailed technical illustrations are a significant asset for visual learners and complex procedures.
Wiring Diagrams:
Inclusion of comprehensive wiring diagrams is crucial for diagnosing and repairing electrical issues on vintage motorcycles.
Coverage Breadth:
The extensive model year coverage (1964-1975) and the inclusion of both 90cc and 125cc models makes this a highly versatile resource.
Engine System:
Complete overhaul, tuning, carburetor, ignition, lubrication, cooling.
Transmission System:
Clutch, gearbox, shifting mechanisms, lubrication.
Electrical System:
Wiring diagrams, lighting, ignition, charging system, battery.
Chassis Suspension:
Front forks, rear suspension, swingarm, shock absorbers, steering.
Braking System:
Drum brake mechanisms, linkage, cables.
Fuel System:
Fuel tank, petcock, fuel lines, carburetor adjustment and cleaning.
Exhaust System:
Muffler, exhaust pipe, mounting.
Wheels Tires:
Spoke wheel maintenance, tire replacement, rim care.
Disassembly Reassembly:
Complete procedures for all major components and systems.
Troubleshooting:
Diagnostic guidance for common problems and failures.
Routine Maintenance:
Oil changes, filter replacements, lubrication points, chain adjustment.
Component Overhaul:
Detailed steps for rebuilding engines, transmissions, and carburetors.
Depth Of Coverage:
Comprehensive, covering all aspects of maintenance and repair from basic adjustments to full engine rebuilds.
Visual Aids:
Hundreds of photos and detailed wiring diagrams.
Engine Type:
Two-stroke, single-cylinder (typical for Hodaka models of this era).
Displacement 90Cc:
Approximately 80-90cc (specifics vary by exact model).
Displacement 125Cc:
Approximately 120-125cc (specifics vary by exact model).
Horsepower 90Cc:
Typically in the 6-10 HP range (estimated).
Horsepower 125Cc:
Typically in the 8-15 HP range (estimated).
Carburetion:
Single-barrel carburetor (e.g., Mikuni, Keihin) with specific jetting and adjustment procedures detailed in the manual.
Fuel Type:
Unleaded gasoline with appropriate two-stroke oil pre-mix.
Transmission Type:
Constant mesh, sequential manual transmission.
Gear Count:
Typically 5 or 6 speeds (specifics depend on model variant).
Clutch Type:
Wet multi-plate clutch.
Transmission Fluid Type:
Manual recommends specific gearbox oil (e.g., SAE 80 or 90 gear oil, or specific 2-stroke transmission oil, details in manual).
Safety Standards:
As per 1960s/1970s motorcycle safety standards; manual focuses on mechanical integrity.
Braking System Type:
Drum brakes front and rear, operated by cables and linkages.
Frame Construction:
Steel frame, typically a cradle design, providing structural integrity.
Oil Change Interval:
Typically every 1,000-2,000 miles or as recommended by the manual (specifics for gearbox oil and 2-stroke premix ratios will be detailed).
Spark Plug Maintenance:
Regular cleaning and gap adjustment as per manual's recommendations, usually every few hundred miles or as needed.
Chain Lubrication Adjustment:
Frequent lubrication and adjustment recommended, especially for off-road use.
2 Stroke Oil Ratio:
Specific pre-mix ratio (e.g., 20:1, 25:1, 32:1 depending on oil and model) detailed in the manual. Recommends specific types of 2-stroke oil.
Transmission Oil Specification:
Refer to manual for specific viscosity and API classification of gearbox oil (e.g., SAE 80W-90 GL-4).
Brake Fluid:
Not applicable for drum brakes requiring cable lubrication and adjustment.
Carburetor Fouling:
Common issue with older 2-strokes; requires regular cleaning and correct jetting.
Ignition System Wear:
Points, condenser, and coil may require inspection and replacement over time.
Clutch Slippage:
Can occur with heavy use or worn plates; requires adjustment or replacement.
Suspension Seal Leaks:
Front fork seals and rear shock seals are common wear items.
Manufacturer Origin:
Hodaka motorcycles were manufactured by theHodaka Corporation (formerly Yamaguchi Motor Company) in Japan, often sold through branches in the United States.
Hodaka Legacy:
Hodaka gained a reputation for building robust, lightweight, and affordable off-road and dual-purpose motorcycles, often favored in motocross and trail riding.
Production Period:
The period 1964-1975 encompasses the core development and popularization of Hodaka models, particularly their popular 90cc and 125cc offerings.
