Vehicle Segment:
Sport ATV / Recreational ATV
Target Audience:
Recreational riders, off-road enthusiasts, DIY mechanics.
Contemporaries:
Other sport ATVs of the mid-1980s, though the Odyssey FL350R's two-seat, semi-enclosed design gave it a unique niche often referred to as a 'swinger' or early side-by-side.
Vehicle Attributes:
Unique two-seat configuration, robust 342cc two-stroke engine, capable off-road performance, rear drum brake (though some models may have front discs or related components).
Manual Value Proposition:
Provides essential technical information for maintaining and repairing a vintage, enthusiast-favored ATV, enabling DIY enthusiasts to keep their machines running optimally.
Engine Systems:
Engine overhaul, piston, connecting rod, crankshaft, flywheel, valves, valve clearance, cylinder, bore, stroke, spark, ignition, magneto, stator, coil, starter, fuel pump, lubrication, compression ratio, carboretor/carburetor (main jet, pilot jet, slow jet, mixture screw, idle), exhaust, muffler, radiator, coolant, engine oil specifications, oil viscosity, air filter, intake.
Transmission Drivetrain:
Transmission, primary reduction gear, clutch, drive shaft, gears, axles, track, wheels, tire specifications, wheel size, wheel bolt pattern, drive train.
Chassis Suspension Steering:
Frame, body, fenders, panels, plastics, front forks, rear suspension, struts, triple trees, swingarm, suspension components, linkage, steering system, handle bars, seat, skis.
Braking System:
Brake system, rotors, brake pads, brake calipers, hydraulic system, brake lines, troubleshooting no brakes.
Electrical Components:
Electrical system, ignition, charging system, rectifier, battery, fuse, switches, lights, starter motor, electronic components, error codes.
Repair And Rebuild:
Complete tear down and rebuild procedures for all major components.
Maintenance:
Routine maintenance, scheduled maintenance, fluid changes (coolant, oil), filter replacement, lubrication.
Troubleshooting:
Comprehensive troubleshooting guide for common problems such as 'no spark', starting issues, engine performance problems, electrical faults.
Diagnostics:
Diagnostic procedures, error code interpretation.
Installation:
Installation instructions for various parts and accessories.
Depth Of Information:
In-depth technical details covering complete overhaul, advanced repair, and detailed diagnostics.
Visual Aids:
Includes pictures and part diagrams for clear visual guidance.
Specifications:
Includes torque specifications for critical fasteners.
Displacement:
342 cc (20.8 cubic inches)
Bore X Stroke:
72.0 mm x 82.0 mm (approximate, common specification for this engine type)
Cooling System:
Liquid-cooled
Ignition System:
CDI (Capacitor Discharge Ignition)
Engine Oil Type:
Typically a high-quality 2-stroke premix oil, or oil injection system for lubrication. Manual specifies exact type and viscosity.
Compression Ratio:
Refer to manual for precise specifications, but generally in the range of 6.0:1 to 7.0:1 for performance 2-stroke engines of this era.
Horsepower:
Estimated 28-30 HP (actual figures may vary and are best confirmed in manual)
Torque:
Refer to manual for exact torque figures.
Carburetor Type:
Single Carburetor, likely a Mikuni VM series (e.g., VM34 or similar) or equivalent.
Fuel Type:
Unleaded gasoline, typically 87-91 octane. Manual will specify recommended octane and any mixing requirements if applicable.
Fuel Delivery:
Gravity feed from fuel tank via fuel pump or direct feed.
Oil Change Interval:
Refer to manual for specific mileage or hours. Typically every 100-200 hours for 2-stroke engines, or as specified.
Spark Plug Replacement:
Recommended at specified intervals or when fouled. Manual will provide part number and gap.
Air Filter Cleaning:
Frequent inspection and cleaning recommended, especially in dusty conditions. Manual will detail cleaning and oiling procedures.
Coolant Flush:
Refer to manual for recommended coolant flush intervals (e.g., annually or every 2 years).
Coolant Type:
Ethylene glycol-based antifreeze. Manual specifies mixture ratio (e.g., 50/50) and capacity.
Brake Fluid Type:
DOT 3 or DOT 4 brake fluid recommended. Manual will specify.
Common Problems:
Typical issues for vintage 2-stroke ATVs can include carburetor gumming, ignition system failures, piston/cylinder wear, clutch wear, and suspension component wear. The manual addresses these and provides diagnostic steps.
Maintenance Focus:
Due to its age, regular maintenance and proactive component replacement (e.g., fuel lines, rubber components) are crucial for reliability.