Target Audience:
Entry-level commuters, students, and urban riders seeking a lightweight 50cc scooter
Competitive Advantage:
Simple two-stroke drivetrain, low weight, and easy home maintenance compared to four-stroke competitors
Segment:
Lightweight 50cc step-through scooter
Engine Layout:
Air-cooled single-cylinder two-stroke with autolube oil injection
Transmission:
Continuously variable transmission (V-belt automatic)
Weight:
Approximately 55-60 kg, making it easy to handle and store
Starting System:
Electric and kick start (varies by year)
Coverage Areas:
All SH50 Razz model years 1987 through 2000
Manual Type:
Professional service repair workshop manual
Page Count:
N/A - varies by section; comprehensive factory-level coverage
Level of Detail:
Technician-grade with step-by-step procedures
Delivery Method:
Instant digital download
Binding:
Digital (PDF document)
Compatibility:
Printable; works on PC, tablet, and smartphone
Engine Removal and Installation:
Complete step-by-step procedures
Cylinder, Piston, and Crankshaft Service:
Measurements, limits, and wear specifications
Two-Stroke Autolube System:
Oil pump inspection, adjustment, and bleeding
Carburetor:
Disassembly, cleaning, jetting specifications, and tuning
Air Intake and Exhaust:
Inspection and replacement procedures
Cooling System:
Air-cooled fin cleaning and inspection
CVT Transmission:
Belt, roller weight, and pulley service procedures
Final Drive / Reduction Gear:
Gear oil change and inspection
Front Fork and Steering:
Teardown, bushing service, and steering head adjustment
Wheels, Tires, and Brakes:
Drum brake service and tire specifications
Frame and Body Panels:
Removal and installation of covers and bodywork
Ignition System:
CDI testing, spark plug specifications, and timing checks
Charging System:
Stator/coil output tests and battery service
Starting System:
Starter motor and starter circuit diagnosis
Wiring Diagrams:
Complete schematics for troubleshooting
Lights and Switches:
Bulb specifications and switch continuity testing
Torque Specifications:
Factory torque values for all fasteners
Maintenance Schedules:
Service intervals and lubrication points
Troubleshooting Charts:
Symptom-based diagnosis for engine, chassis, and electrical faults
Special Tools:
Required and recommended tools listed per procedure
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Standard Transmission:
Continuously variable transmission (V-belt automatic)
Optional Transmission:
N/A - no alternative transmission offered on this model
Primary Reduction:
Gear-driven primary reduction
Final Drive:
Gear final drive in sealed transmission case
Service Features:
CVT belt, roller weights, and drive pulley serviceable with hand tools
Transmission Oil Capacity:
Approximately 0.1 liters of gear oil (change annually)
Crash Test Ratings:
N/A - 50cc scooters of this era were not crash tested by NCAP or IIHS
Brakes:
Drum brakes front and rear (specification varies by year)
Lighting:
Headlight, taillight, and turn signals
Mirrors:
Left and right rearview mirrors
Passive Features:
Step-through frame and low seat height for rider control
Ignition:
Keyed ignition switch
Audio System:
N/A - not equipped on this model
Instrumentation:
Speedometer, fuel gauge (varies by year), and indicator lamps
Advanced Driver Assistance:
N/A - none; 1987-2000 50cc scooter era predates ADAS
Electrical Convenience:
Electric start on applicable model years
Storage:
Underseat storage compartment and glovebox (varies by year)
Engine Oil (Autolube Tank):
Check frequently; refill with Yamalube 2-stroke injection oil
Transmission Gear Oil:
Change annually or every 3,000 km
Spark Plug:
Inspect every 1,500 km; replace every 3,000 km
Air Filter:
Clean every 1,500 km, more often in dusty conditions
CVT Belt:
Inspect regularly; replace when worn or cracked
Brake Adjustment:
Check free play at every service
Fuel System:
Carburetor cleaning recommended after extended storage
Common Wear Items:
CVT roller weights, drive belt, brake shoes, and spark plug
Known Issues:
Two-stroke carbon buildup in exhaust and clogged carburetor jets after storage
Chassis Lubrication:
Grease steering head bearings and cables per schedule
Manufacturer:
Yamaha Motor Company, a leading Japanese powersports manufacturer founded in 1955
Model Evolution:
Razz introduced in 1987 as Yamaha's compact 50cc scooter; sold through 2000 with incremental updates rather than a redesign
Production Location:
Japan (Yamaha Motor facilities)
Market:
Sold primarily in North America as the Razz; SH50 designation used in other markets
