Target Audience:
Yamaha YT175 Tri-Moto owners, independent repair shops, and DIY mechanics.
Value Proposition:
Provides essential technical data and repair procedures for maintaining and repairing a vintage Yamaha ATV, enabling owners to perform work themselves and reduce service costs.
Digital Access:
Instant download post-payment, allowing immediate access to repair information.
Lifetime Protection:
Lifetime replacement policy for lost or damaged downloads.
Engine System:
Detailed coverage of engine assembly, disassembly, inspection, and repair.
Fuel System:
Carburetor adjustment, cleaning, fuel pump operation, fuel lines, and fuel tank maintenance.
Lubrication Cooling:
Lubrication system diagrams, oil change procedures, oil filter replacement, and cooling system checks (if applicable).
Transmission Drive:
Transmission overhaul, clutch operation, drive chain and sprocket inspection, adjustment, and replacement.
Steering Suspension:
Steering column maintenance, tie rod adjustments, front and rear shock absorber service, and suspension component checks.
Electrical System:
Ignition system troubleshooting, lighting circuits, charging system (stator, regulator/rectifier), battery maintenance, and wiring diagrams.
Bodywork Chassis:
Frame inspection, fender removal/installation, seat maintenance, and general body panel work.
Intake Exhaust:
Air filter service, exhaust system inspection, and gasket replacement.
Routine Maintenance:
Scheduled maintenance tasks, lubrication points, and general upkeep procedures.
Engine Repair:
Complete engine rebuild procedures, piston ring replacement, cylinder head service, and valve adjustments.
Troubleshooting:
Diagnostic charts and procedures for common and advanced issues, including engine performance, electrical faults, and starting problems.
Component Replacement:
Step-by-step instructions for replacing major and minor components.
Depth Of Information:
Comprehensive, covering basic to advanced repair and diagnostic procedures.
Engine Type:
2-stroke, single-cylinder
Bore X Stroke:
64 mm x 54 mm
Cooling System:
Air-cooled
Horsepower:
Approximately 15-18 HP (estimated)
Torque:
Not explicitly listed, but characteristic of 2-stroke utility engines of the era.
Carburetor:
Mikuni VM series (likely VM34 or similar)
Fuel Type:
Unleaded gasoline with 2-stroke oil mixture (typically 40:1 or 50:1)
Fuel Tank Capacity:
Approx. 2.8 Gallons (10.6 Liters)
Transmission Type:
5-speed constant mesh with automatic clutch (or foot-shift with automatic clutch)
Drive System:
Shaft drive to rear wheels, chain drive to front wheel(s) (depending on specific Tri-Moto configuration; YT175 is primarily rear-wheel drive with a unique 3-wheel setup).
Clutch Type:
Wet, multi-plate, automatic
Infotainment System:
Not applicable. This is a vintage utility/recreational ATV with basic controls and instrumentation.
Driver Assistance Features:
Not applicable. Focus is on mechanical and electrical systems.
Connectivity Features:
Not applicable. Analog systems.
Oil Change Interval:
Typically every 50-100 hours of operation or annually, as specified in the manual.
Air Filter Cleaning:
Recommended every 20-40 hours of operation, depending on operating conditions.
Spark Plug Check:
Check and gap spark plug at recommended intervals, often every 10-20 hours.
Engine Oil Type:
2-stroke engine oil, specific mixture ratio (e.g., SAE 20W-40 or equivalent) for pre-mix or oil injection systems.
Gear Oil Type:
Yamaha recommended gear oil or equivalent for the final drive/transmission case (specific viscosity to be detailed in the manual).
Common Yt175 Issues:
Potential issues can include carburetor gumming, ignition coil failure, worn clutch components, and fatigue in older rubber parts. The manual will provide diagnostic steps for these.
Carburetor Cleaning Importance:
Due to age and fuel stabilizers, regular carburetor cleaning is often necessary for optimal performance.
Yamaha Atv History:
Yamaha has a long history in ATV manufacturing, with the Tri-Moto series being an early innovator in the three-wheeled ATV market, preceding the popular four-wheeled models.
Yt175 Development:
The YT175 was an evolution of Yamaha's earlier three-wheeled designs, offering improved performance and features for recreational and utility use. It was part of a significant period of growth for the ATV industry.
Production Era:
Early 1980s, a period of rapid development and popularity for three-wheeled ATVs.
