Market Position:
The Yamaha Tri-Moto 175 YT175 was a popular three-wheeled ATV known for its off-road capabilities and reliability during its production run.
Competitive Analysis:
Competed against other three-wheeled ATVs from brands like Honda (e.g., ATC series) and Suzuki in the early to mid-1980s.
Key Features:
Robust 170cc engine, distinctive three-wheel design, rugged suspension for varied terrain, and Yamaha's reputation for durability.
Manual Purpose:
Provides essential information for owners and technicians to maintain, diagnose, and repair the Yamaha Tri-Moto 175 YT175.
Coverage Years:
1982-1985 (with coverage for similar years and models)
Coverage Scope:
Comprehensive service and repair
Page Count:
Not Specified, but described as 'complete'
Manual Type:
Service Repair Workshop Manual
Format:
Adobe Acrobat PDF
Engine:
Engine overhaul, tuning, specifications, components
Transmission:
Gearbox operation, maintenance, repair
Chassis:
Frame, suspension, steering, wheels
Electrical:
Ignition system, lighting, wiring diagrams, charging system
Fuel System:
Carburetor, fuel lines, fuel tank
Brakes:
Brake system diagnosis, repair, fluid
Lubrication:
Lubrication points, schedules, fluid types
Steering:
Steering mechanism, adjustments, wear components
Suspension:
Front and rear suspension systems, shock absorbers, linkages
Frame:
Frame integrity, alignment, repair considerations
Clutch:
Clutch operation, adjustment, replacement
Seats System:
Seat mounting and related components
Locks:
Lock mechanisms, if applicable
Maintenance:
Routine maintenance, scheduled servicing, preventative care
Troubleshooting:
Diagnostic procedures for common and uncommon issues
Repair:
Step-by-step repair instructions for all major systems
Disassembly Reassembly:
Detailed instructions for component removal and installation
Specifications Data:
Torque values, clearances, fluid capacities, electrical values
Depth:
Comprehensive, suitable for dealership-level repairs and advanced DIY enthusiasts
File Format:
PDF (Adobe Acrobat)
Searchability:
Likely text-searchable PDF for easy navigation
Print Quality:
Optimized for printing, allows selective section printing
Binding Type:
Digital download; printable for binder inclusion
Paper Type:
N/A (digital), but printable on standard paper
Engine Type:
2-stroke, air-cooled
Displacement:
170 cc (approx.)
Bore X Stroke:
Not Specified in product info, typical for this era around 64mm x 54mm
Compression Ratio:
Not Specified in product info, likely around 6.5:1 to 7.0:1
Horsepower:
Estimated 10-15 HP at around 6,000 RPM
Torque:
Not Specified in product info
Fuel Delivery:
Carburetor
Carburetor Model:
Likely a Mikuni VM series (e.g., VM26SS) or similar
Fuel Type:
Unleaded gasoline (typically 87 octane or higher)
Ignition System:
CDI (Capacitor Discharge Ignition)
Spark Plug:
Typically NGK B8ES or equivalent
Length:
Not specified in product info, typically around 70-75 inches
Width:
Not specified in product info, typically around 40-45 inches
Height:
Not specified in product info, typically around 40-45 inches
Dry Weight:
Approximately 300-320 lbs
Gross Vehicle Weight Rating:
Not specified
Safety Ratings:
N/A (ATVs are not typically crash-tested and rated like cars; safety relies on operator skill and adherence to safe riding practices).
Active Features:
Disc brakes front and rear, reliable throttle and braking controls.
Passive Features:
Three-wheel stability (compared to two-wheel vehicles), handlebar grips.
Oil Change Interval:
Refer to manual for specific gearbox oil change intervals (typically every 6-12 months or 100-200 hours of use).
Air Filter Cleaning:
Clean and re-oil foam air filter every 20-40 hours or as conditions dictate.
Spark Plug Replacement:
Inspect and clean spark plug every 10-20 hours; replace as needed (refer to manual for gap specification).
Drive Chain Lubrication:
N/A (Shaft drive)
Engine Oil Mix:
Yamaha 2-stroke oil or equivalent, mixed with gasoline at a ratio specified in the manual (typically 20:1 or 50:1 depending on oil type and model year variations).
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid
Coolant Type:
N/A (Air-cooled engine)
Known Issues:
Common issues can include carburetor gumming due to fuel sitting, worn clutch components, ignition system failures (CDI, stator), and suspension wear. Seal leaks (engine, transmission) are also possible on older units.
Rebuild Recommendations:
Regular decarbonizing of the 2-stroke engine and cleaning of the exhaust port can prevent performance degradation. Seal replacement is often a proactive maintenance step.
Brand Heritage:
Yamaha has a long history of innovation in powersports, known for building reliable and performance-oriented motorcycles, ATVs, and snowmobiles since the mid-20th century.
Model Evolution:
The Tri-Moto 175 YT175 was a successor and refinement of earlier Yamaha three-wheeled models like the YT125, offering improved performance and features for its era.
Production Years:
1982-1985
Production Location:
Japan
Discontinuation Reason:
The three-wheeled ATV market declined due to safety concerns and the rise of more stable four-wheeled ATVs, leading to the phasing out of three-wheel models by most manufacturers in the late 1980s.
