Segment:
Mid-size utility ATV
Target Audience:
Recreational riders, farmers, utility users.
Key Competitors:
Honda FourTrax 350, Polaris Sportsman 400/500, Suzuki King Quad 300/350, Kawasaki Bayou 300.
Engine Type:
Air-cooled, 4-stroke, SOHC, 2-valve.
Transmission Type:
Automatic (Ultramatic) with forward, neutral, reverse.
Drivetrain Options:
Shaft drive, available in 2WD and 4WD.
Suspension:
Independent front suspension, swingarm rear suspension.
Engine Mechanical:
Full engine overhaul, top-end and bottom-end components, piston, rings, valves, camshaft, crankshaft, cylinder head, cylinder block.
Fuel System:
Carburetor (Mikuni BSR33) specifications, jetting, cleaning, adjustment, fuel pump, fuel tank, fuel lines.
Ignition System:
CDI unit, ignition coils, spark plug specifications, timing, troubleshooting.
Cooling System:
Radiator, fan, thermostat, coolant specifications, flushing, bleeding procedures.
Transmission:
Automatic transmission (Ultramatic), gear shifting mechanism, oil specifications, internal components, service.
Drivetrain:
Shaft drive, differentials (front and rear), CV joints, drive shafts, propeller shafts, final drive oil specifications.
Suspension:
Front and rear suspension systems, shock absorbers, springs, bushings, adjustment, rebuilding.
Brakes:
Hydraulic brake system, front and rear disc brakes, brake calipers, master cylinders, brake lines, brake fluid specifications, bleeding procedures, pad replacement.
Electrical System:
Wiring diagrams, battery specifications, starter motor, alternator/stator, lighting system, switches, fuses, relays, troubleshooting.
Steering:
Steering system components, tie rods, steering knuckles, grease points, adjustments.
Frame And Body:
Frame inspection, chassis components, body panels, fenders, rack assembly, seating.
Routine Maintenance:
Oil changes, filter replacements, spark plug maintenance, air filter cleaning/replacement, lubrication points, tire pressure checks.
Troubleshooting:
Systematic diagnostic procedures for common and uncommon issues, fault codes (if applicable), symptom-based troubleshooting.
Engine Repair:
Complete engine teardown, inspection, reassembly, and tuning. Valve adjustments, decarbonizing.
Transmission Service:
Transmission fluid service, seal replacement, clutch adjustments (if applicable for automatic).
Brake System Service:
Brake fluid flush and bleed, pad and rotor replacement, caliper service.
Electrical Diagnostics:
Use of multimeters, testing circuits, identifying shorts and open circuits, component testing.
Suspension And Steering Repair:
Ball joint replacement, tie rod end replacement, shock absorber service, wheel alignment checks.
Depth:
Comprehensive, covering from basic maintenance to complete engine and transmission overhauls.
Detail Level:
Includes detailed torque specifications, component tolerances, measurement values, and step-by-step repair instructions.
Illustrations:
Likely includes diagrams, schematics, and photographic illustrations for clarity.
Engine Type:
4-stroke, SOHC, 2-valve, single-cylinder
Displacement:
348 cc (21.2 cu. in.)
Bore X Stroke:
83 mm x 64.5 mm (3.27 in x 2.54 in)
Cooling System:
Air-cooled with fan assist
Carburetor:
Mikuni BSR33, single
Starter System:
Electric starter
Oil Type:
Yamalube 4 (or equivalent) 10W-40, API SG or higher, JASO MA
Oil Capacity:
2.20 L (2.3 US qt) with oil filter change
Horsepower:
Approximately 21 HP @ 6000 RPM (Estimated, not officially published in all specs)
Torque:
Approximately 27 Nm (19.9 lb-ft) @ 5000 RPM (Estimated)
Fuel Type:
Unleaded gasoline (91 octane or higher recommended)
Fuel Tank Capacity:
12.0 L (3.2 US gal)
Engine Oil Change:
Every 1000 km (600 miles) or 6 months; check level more frequently.
Air Filter:
Clean every 500 km (300 miles) or 3 months; replace as needed.
Spark Plug:
Inspect every 1000 km (600 miles) or 6 months; replace as needed.
Final Drive Oil:
Change every 2000 km (1200 miles) or 12 months.
Brake Fluid:
Flush and replace every 2 years.
Grease Points:
Lubricate every 500 km (300 miles) or 3 months (refer to manual for specific locations).
Engine Oil Specification:
Yamalube 4 (or equivalent) 10W-40, API SG or higher, JASO MA
Brake Fluid Specification:
DOT 3 or DOT 4 hydraulic brake fluid
Final Drive Oil Specification:
Yamalube Gear Oil (or equivalent) SAE 80 API GL-4
Coolant Specification:
Permanent type antifreeze coolant (50% solution) or Yamaha Yamalube Coolant
Carburetor Performance:
Mikuni BSR33 can sometimes experience wear or clogging, requiring cleaning or jetting adjustments.
Starter Clutch:
Some owners have reported starter clutch wear over time, leading to a grinding noise or difficulty starting.
Suspension Bushings:
As with many ATVs of this era, suspension bushings can wear and require replacement for optimal ride quality.
Cv Boots:
CV joint boots can be susceptible to tears, which can lead to damage if not addressed promptly.
