Target Audience:
Owners and technicians seeking comprehensive repair and maintenance information for the Yamaha YTZ250N Tri-Z 250.
Value Proposition:
Provides dealer-level technical information at a fraction of the cost, enabling DIY repairs and saving significant money.
Accessibility:
Instant download delivery, printable pages, user-friendly PDF format.
Completeness:
Covers all repairs A-Z, mechanical and electrical, with extensive detail and diagrams.
Longevity:
Digital manual that never times out or expires.
General Coverage:
All models and repairs covered A-Z, mechanical and electrical.
Estimated Page Count:
Varies by specific model year and configuration, but comprehensive (typically 300-600+ pages for full workshop manuals).
Type:
Workshop Service Repair Manual
Engine:
Engine removal/installation, cylinder head/valve train, engine block, engine lubrication, cooling system, fuel and emissions system, exhaust system, ignition system, timing procedures, tensioner adjustments.
Transmission:
Clutch, manual transmission, transaxle, differential, driveshaft.
Chassis:
Steering, suspension, brakes (including ABS if applicable to specific models), bodywork.
Electrical:
Full electrical system diagnostics, wiring diagrams, SRS (Supplemental Restraint System) components.
Climate Control:
Heating, air conditioning, automatic climate control (as applicable).
Routine Maintenance:
Included, with detailed step-by-step instructions.
Tune Up:
Comprehensive tune-up procedures are detailed.
Repair Procedures:
All repairs from A-Z are covered, including disassembly, inspection, repair, and reassembly.
Troubleshooting:
Diagnostic procedures and common issue resolution are included.
Installation Instructions:
General removal and installation instructions for major components.
Depth:
High. Covers detailed mechanical and electrical repairs, including component-level diagnostics and rebuilds, suitable for professional mechanics and advanced DIYers.
Diagnostic Capability:
Advanced, with specific troubleshooting guides and symptom-based diagnostics.
Rebuild Instructions:
Detailed instructions for engine and transmission rebuilds.
File Format:
PDF (Portable Document Format)
Printability:
All pages are printable, allowing users to print only necessary sections.
Image Quality:
Professional quality with tons of detailed pictures and diagrams.
Binding:
Digital (PDF Download) - No physical binding.
Paper Type:
Not applicable (digital format).
Compatibility:
Works on any PC/MAC computer using Microsoft Windows (XP, NT, 2000, Vista, Windows 7, etc.) and compatible PDF readers.
Engine Type:
Two-stroke, liquid-cooled, reed valve, single cylinder (YTZ250N specifically).
Displacement:
Approximately 246cc (exact figures may vary slightly by year/specific variant).
Bore X Stroke:
Typically around 66.0 mm x 73.0 mm (verify with specific model year data).
Horsepower:
Estimated 30-35 HP range (depending on specific tuning and model year).
Torque:
Specific torque figures are detailed within the manual for proper adjustments.
Carburetion:
Typically a single Mikuni carburetor (e.g., VM28 or similar).
Fuel Type:
Unleaded gasoline (specify octane rating as per manual).
Oil Type:
Two-stroke engine oil (specify API service classification, e.g., TCW-3 or equivalent for pre-mix, or oil injection system type).
Coolant Type:
Ethylene glycol-based antifreeze coolant (specify mixture ratio, e.g., 50/50 water/coolant).
Type:
6-speed manual transmission.
Transmission Options:
N/A (standard manual transmission for this model).
Clutch Type:
Wet, multiple-disc clutch.
Transmission Fluid:
Yamaha's recommended transmission oil or equivalent API GL-4 (specify viscosity grade, e.g., 10W-30 or 80W-90, as per manual).
Length:
Specific dimensions are provided in the manual for each model year.
Width:
Specific dimensions are provided in the manual for each model year.
Height:
Specific dimensions are provided in the manual for each model year.
Dry Weight:
Around 280 lbs (127 kg) for typical configurations (verify exact weight in manual).
Curb Weight:
Specific curb weight figures are detailed in the manual.
Front Tire Size:
Typically 22x7-10 or similar (verify specific sizes in manual).
Rear Tire Size:
Typically 22x10-9 or similar (verify specific sizes in manual).
Wheel Bolt Pattern:
Not applicable for typical ATV wheel mounting; lug nut torque specifications are provided in the manual.
Crash Test Results:
Not applicable for this type of recreational vehicle.
Brakes:
Hydraulic disc brakes front and rear. Manual details inspection, service, and bleeding procedures.
Frame:
Robust steel frame construction designed for off-road use. Manual covers frame inspection and repair.
Handlebars:
Standard ATV handlebars for control. Manual covers inspection and replacement.
Infotainment System:
N/A (basic recreational vehicle design of the era).
Driver Assistance Features:
N/A (basic recreational vehicle design of the era).
Connectivity Features:
N/A.
Ignition System:
CDI (Capacitor Discharge Ignition) or similar electronic ignition system. Manual covers troubleshooting and component testing.
Oil Change Interval:
Detailed in manual; typically based on operating hours or mileage/ride time.
Spark Plug Maintenance:
Specific replacement intervals and gap specifications provided in the manual.
Air Filter Cleaning:
Recommended cleaning/replacement intervals detailed for optimal engine performance.
Engine Oil Type:
API TC-W3 or equivalent 2-stroke oil. Manual specifies brand recommendations and pre-mix ratios.
Transmission Oil Type:
Yamaha's specified transmission oil or API GL-4 gear oil (e.g., 10W-30, 80W-90). Manual provides exact specifications.
Coolant Type:
50/50 mix of ethylene glycol-based antifreeze and distilled water.
Carburetor Tuning:
Can be sensitive to altitude and temperature; manual provides tuning guidelines.
Clutch Wear:
Normal wear item; manual details inspection and replacement procedures.
Power Valve Maintenance:
Crucial for 2-stroke performance; manual details cleaning and adjustment.
Valve Timing:
Not applicable for 2-stroke engines, but chain/gear timing procedures are covered if relevant to specific internal components.
Tightening Torques:
Comprehensive list of torque specifications for all critical fasteners.
Tensioner Adjustments:
Procedures for chain tensioner adjustment and release/reset methods are included.
Yamaha Atv History:
Yamaha has a long history of producing high-performance off-road vehicles, including pioneering the sport ATV segment with models like the Tri-Z.
Tri Z Development:
The YTZ250 Tri-Z was a revolutionary machine in its time, known for its powerful two-stroke engine, advanced suspension, and competitive performance in motocross and desert racing.
Production Years:
The YTZ250N was primarily produced in the mid-1980s (e.g., 1985-1986).
Manufacturing Location:
Japan (typical for Yamaha performance vehicles of this era).
Model Reputation:
The YTZ250 Tri-Z is highly regarded by enthusiasts for its performance and iconic status in the sport ATV world.
Performance Reviews:
Contemporary reviews praised its power, handling, and suspension, establishing it as a top-tier sport ATV.
Industry Standard:
Follows standard automotive engineering practices of its time; manual provides specifications adherence.
