Vehicle Segment:
Utility and recreational ATV, known for its robust build and unique dual rear wheel configuration.
Target Audience:
Users seeking reliable all-terrain capability for work, farming, and recreation, valuing stability and traction.
Key Competitors Era:
Honda TRX series, Kawasaki Bayou, Suzuki LT series.
Unique Selling Proposition:
The YTM225DRN's defining feature is its dual rear wheel setup, offering enhanced traction and stability, particularly in challenging terrain or when carrying loads.
Feature 1:
Dual rear wheels for superior traction and stability.
Feature 2:
Torquey 4-stroke engine suitable for hauling and trail riding.
Feature 3:
Shaft drive for low maintenance and reliability.
Feature 4:
Rugged construction indicative of Yamaha's off-road heritage.
Applicable Years:
1983, 1984, 1985, 1986
Region Of Origin:
North America (primary focus)
Estimated Pages:
Hundreds (exact count not specified, but described as 'COMPLETE')
Type:
Workshop Service Repair Manual
Source:
Official Factory Service Manual
Powertrain:
Engine overhaul, carburetor tuning, ignition system, exhaust system
Drivetrain:
Transmission, drive shafts, differential (if applicable), chain drive maintenance
Chassis:
Frame inspection, suspension (front and rear), steering system, braking system
Electrical:
Wiring diagrams, lighting, battery system, starting system, charging system, ignition switch
Bodywork And Trim:
Body panel removal and installation, fenders, seat, handlebars
Routine Maintenance:
Oil changes, filter replacement, lubrication points, chain adjustment, spark plug service
Troubleshooting:
Diagnostic flowcharts, common problem identification and solutions
Major Repairs:
Engine disassembly and reassembly, transmission rebuild, carburetor overhaul, suspension component replacement
Component Specific Procedures:
Brake caliper servicing, wheel bearing replacement, carburetor jetting and synchronization
Specifications And Tolerances:
Torque values, clearances, wear limits, fluid capacities
Depth:
Comprehensive, covering all aspects from basic checks to complete engine and drivetrain rebuilds.
Diagnostic Capabilities:
Includes detailed troubleshooting guides for electrical and mechanical issues.
Special Tools:
May specify required special tools for certain procedures.
Type:
PDF (Portable Document Format)
Searchability:
Likely text-searchable due to it being a factory manual.
Quality Description:
High-resolution, suitable for printing individual pages or the entire document.
Binding Description:
N/A (Digital Download - user's choice for binding if printed)
Paper Description:
N/A (Digital Download - user's choice for paper if printed)
Type:
Four-stroke, air-cooled, SOHC
Bore X Stroke:
Exact dimensions available in manual, typically around 69mm x 62mm
Compression Ratio:
Manual specification, typically around 9.0:1 to 9.5:1
Valvetrain:
SOHC (Single Overhead Camshaft), 2 valves
Horsepower:
Estimated 15-20 HP (precise figures found in manual)
Torque:
Good low-end torque for pulling power (specific figures in manual)
Carburetor:
Single Mikuni carburetor (model number specified in manual, e.g., VM32SS)
Fuel Type:
Unleaded gasoline (Octane rating specified in manual)
Fuel Capacity:
Typically 2.5-3.0 gallons (manual will confirm exact)
Overall Length:
Approx. 75-80 inches (manual will provide exact)
Overall Width:
Significantly wider than single-wheel models due to dual rear wheels; manual will confirm.
Overall Height:
Approx. 42-45 inches (manual will provide exact)
Dry Weight:
Approx. 450-500 lbs (manual will provide exact)
Ground Clearance:
Approx. 5-7 inches (manual will provide exact)
Safety Standards:
Adheres to industry safety standards for ATVs of its era. No formal crash test ratings as applied to cars.
Braking System:
Front: Drum; Rear: Dual Drum Brakes (for dual wheels)
Parking Brake:
Yes, typically integrated with rear braking system.
Lighting:
Headlight, Taillight/Brake Light
Handlebars:
Wide handlebars for control and stability.
Oil Change Interval:
Refer to manual; typically every 1000-1500 miles or annually.
Air Filter Cleaning:
Frequent checks recommended, especially in dusty conditions. Manual details interval.
Spark Plug Replacement:
Refer to manual; typically every 3000-4000 miles or as needed based on condition.
Chain Lubrication Adjustment:
Regular checks recommended, especially before long rides. Manual provides specifications.
Engine Oil Type:
Yamaha recommends specific grades of Yamalube or equivalent API SE, SF, SG or SH service classification, SAE 10W-30 or 10W-40 (verify exact viscosity and API rating in manual).
Engine Oil Capacity:
Approximately 1.5-2.0 liters (verify exact capacity in manual).
Transmission Oil Type:
Yamaha recommends specific transmission oil or gear oil (verify grade and type in manual).
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid (verify in manual for specific caliper type).
Carburetor Wear:
Older carburetors may experience wear, clogging, or require tuning due to age and fuel quality.
Electrical Connections:
Corroded or loose electrical connections can be an issue on vintage ATVs.
Suspension Bushings:
Rubber bushings in suspension and steering can degrade over time, requiring replacement for optimal handling.
Shaft Drive Maintenance:
While low maintenance, periodic inspection of shaft drive boots and lubrication is advised.
Yamaha Motorsports:
Yamaha has a long and storied history in motorsports, including motorcycles and ATVs, known for innovation and durability.
Yatv Lineup:
The YTM series represented Yamaha's entry into the utility/recreational ATV market in the early to mid-1980s.
Ytm225 Variant:
The DRW variant was a specialized version focusing on enhanced traction and stability, setting it apart from the standard single-wheel models.
Production Period:
1983-1986
Manufacturing Location:
Japan (primary)
