Target Audience:
DIY enthusiasts, independent repair shops, Yamaha owners seeking to maintain or restore their vintage ATVs.
Value Proposition:
Offers a complete and detailed resource for servicing a range of Yamaha's early popular ATVs, often difficult to find in physical format.
Diagrams Quality:
High-quality, clear diagrams and illustrations crucial for accurate repair.
Completeness:
Considered one of the most comprehensive compilations for these specific models.
Accessibility:
Instant PDF download provides immediate access to vital service information.
Covered Models:
1983 Yamaha YTM200EK Tri-Moto, 1983 Yamaha YTM225DXK Tri-Moto, 1984 Yamaha YTM200L Tri-Moto, 1984 Yamaha YTM225DXL Tri-Moto, 1985 Yamaha YFM200N-S Moto-4, 1985 Yamaha YTM200N Tri-Moto, 1985 Yamaha YTM225DXN Tri-Moto, 1986 Yamaha YFM200DXS Moto-4
Estimated Page Count:
300+
Manual Type:
Service and Repair Manual
Engine:
Engine disassembly, inspection, assembly, tuning, lubrication, cooling system
Fuel System:
Carburetor service and adjustment, fuel pump, fuel lines
Transmission:
Clutch service, gearbox inspection and repair, drive shaft, final drive
Electrical System:
Ignition system, lighting, starter motor, battery, charging system, wiring diagrams
Brakes:
Drum brake service, hydraulic system (if applicable), brake fluid specifications
Suspension:
Front forks, rear shock absorber, linkage maintenance
Steering:
Steering mechanism, tie rods, wheel alignment
Frame And Bodywork:
Chassis inspection, body panel removal and installation, seats
Maintenance:
Scheduled maintenance, oil changes, filter replacements, lubrication points
Troubleshooting:
Diagnostic flowcharts, common problems and their solutions
Repair:
Step-by-step repair instructions for all major components
Disassembly Assembly:
Detailed procedures for complete teardown and reassembly of systems
Depth:
Comprehensive: Covers basic maintenance to complete engine and transmission overhauls, electrical diagnostics, and chassis repairs.
Engine Type:
4-stroke, Air-cooled, SOHC
Displacement Yfm200:
196cc
Displacement Ytm225:
223cc
Bore X Stroke Yfm200:
66 mm x 57 mm
Bore X Stroke Ytm225:
68.5 mm x 62 mm
Compression Ratio Yfm200:
9.2:1
Compression Ratio Ytm225:
9.1:1
Estimated Horsepower Yfm200:
13-15 HP (approximate, varies by tuning and year)
Estimated Horsepower Ytm225:
16-18 HP (approximate, varies by tuning and year)
Carburetor Model:
Mikuni VM Series (e.g., VM26 for YFM200, VM28 for YTM225)
Fuel Type:
Unleaded gasoline
Fuel Tank Capacity:
Varies by model, typically 2.5-3.0 Gallons
Transmission Type Yfm200:
5-speed manual with Automatic Clutch
Transmission Type Ytm225:
6-speed manual with Automatic Clutch
Reverse Gear:
Standard on most models
Drive System:
Shaft drive (2WD)
Clutch Type:
Wet multi-plate automatic clutch
Final Drive Oil Type:
Yamalube Gear Oil or equivalent SAE 80W API GL-4
Length:
Varies by model, approximately 70-75 inches
Width:
Varies by model, approximately 40-45 inches
Height:
Varies by model, approximately 40-43 inches
Dry Weight Yfm200:
Approx. 350-370 lbs
Dry Weight Ytm225:
Approx. 390-410 lbs
Ground Clearance:
Varies by model, typically 4-6 inches
Atv Safety Considerations:
As an early ATV, it lacks modern safety features. Emphasizes the importance of riding gear (helmet, eye protection, boots, gloves, long sleeves/pants) and proper training.
Braking System:
Drum brakes, typically front and rear. Rear brake often foot-actuated, front brakes often hand-actuated.
Lighting:
Headlight, taillight/brake light. Manual covers electrical system for proper function.
Engine Oil Change:
Every 1,000 km or annually (refer to manual for specific usage recommendations)
Air Filter Cleaning:
Every 500 km or more frequently in dusty conditions
Spark Plug Check:
Every 1,000 km
Valve Clearance Check:
Every 2,000 km
Engine Oil Type:
Yamalube 4 (or equivalent) SAE 10W-30 API SE, SF, or SG classification
Engine Oil Capacity:
Approx. 1.7 Liters (1.8 US qt) with filter change
Brake Fluid Type:
DOT 3 or DOT 4
Carburetor Issues:
Common for older carburetors to become gummed up, requiring cleaning and re-jetting. Pilot circuits are prone to clogging.
Clutch Wear:
Automatic clutch components can wear over time, affecting engagement and performance. Manual details adjustment and replacement.
Electrical Gremlins:
Aging wiring harnesses and connectors can lead to intermittent electrical issues. Comprehensive wiring diagrams in the manual are essential.
Carburetor Float Height:
Improper float height can cause rich or lean running conditions. Manual specifies correct adjustment.
Suspension Leaks:
Seals in front forks and rear shocks may degrade, leading to oil leaks. Manual provides seal replacement procedures.
Yamaha Atv Origins:
Yamaha was a pioneer in the ATV market, introducing the first mass-produced three-wheel ATV (the YTM200 Tri-Moto) in 1980, followed by four-wheel models.
Moto 4 Introduction:
The Moto-4 line, beginning with the YFM200, represented Yamaha's expansion into the four-wheel ATV segment, offering increased stability and versatility.
Manufacturing Period:
These models were produced during a critical growth phase for the ATV industry in the early to mid-1980s.
Market Impact:
These ATVs established Yamaha's reputation for reliability and performance in the utility and recreational ATV segments.
