Engine Mechanical:
Engine disassembly, inspection, assembly, piston, rings, crankshaft, connecting rods, cylinder head, valves, lubrication system.
Fuel System:
Carburetor service (Mikuni VM series likely), fuel pump, fuel lines, fuel tank maintenance, jetting specifications.
Ignition System:
CDI unit, ignition coil, spark plugs, timing, troubleshooting ignition faults.
Cooling System:
Coolant specifications, radiator, fan, thermostat, water pump, hoses, bleeding procedure.
Exhaust System:
Exhaust pipe, muffler, sealing, inspection for leaks.
Drive System:
Clutch (primary and secondary), belt inspection and replacement, gearbox, drive chain, sprockets.
Suspension System:
Front suspension (telescopic forks, ski suspension), rear suspension (articulated track suspension), shock absorbers, springs, bushings.
Braking System:
Hydraulic disc brake system, brake pads, rotor, master cylinder, caliper, brake fluid specifications, bleeding.
Electrical System:
Wiring diagrams, lighting (headlight, taillight, brake light), starter motor, battery, charging system (stator, rectifier/regulator), switches, instrumentation.
Steering System:
Handlebar, steering post, tie rods, ski spindles, alignment.
Chassis And Body:
Frame inspection, body panels, seat, windshield, running boards, tunnel protection.
Routine Maintenance:
Oil changes, spark plug replacement, chain lubrication, clutch adjustment, track tensioning, suspension lubrication.
Troubleshooting:
Diagnostic procedures for engine performance issues, electrical faults, clutch problems, suspension issues.
Engine Repair:
Top-end rebuilds, crankshaft replacement, carburetor overhaul, cooling system service.
Clutch Service:
Primary and secondary clutch disassembly, cleaning, inspection, roller/weight inspection, spring replacement, tuning.
Suspension Overhaul:
Shock absorber service, spring replacement, slider bushing replacement, ski alignment.
Electrical Diagnostics:
Testing ignition components, charging system analysis, troubleshooting lighting and switches.
Brake System Service:
Brake pad replacement, rotor inspection, hydraulic system bleeding, master cylinder service.
Depth:
Comprehensive, suitable for professional mechanics and advanced DIY enthusiasts.
Diagnostic Charts:
Includes diagnostic flowcharts and symptom-based troubleshooting guides.
Specifications Data:
Provides detailed torque values, clearances, fluid capacities, and performance specifications.
Engine Type 600:
2-Stroke, Reed Valve, Liquid-Cooled
Engine Type 700:
2-Stroke, Reed Valve, Liquid-Cooled
Bore X Stroke 600:
Approx. 73.0 mm x 70.0 mm
Bore X Stroke 700:
Approx. 82.0 mm x 66.2 mm
Displacement 600:
597cc (approx.)
Displacement 700:
698cc (approx.)
Horsepower 600:
Estimated 100-115 HP (varies by tuning)
Horsepower 700:
Estimated 115-130 HP (varies by tuning)
Compression Ratio:
Typically around 7.0:1 - 7.5:1
Carburetor Model:
Likely Mikuni VM Series (e.g., VM38 or VM40) dual carburetors
Fuel Type:
Unleaded gasoline (minimum 87 octane recommended)
Oil Injection:
Automatic oil injection system (Yamaha ACC)
Oil Type:
Yamalube 2-stroke oil or equivalent JASO FD certified oil
Oil Change Engine:
Typically every 100-150 operating hours or annually, depending on usage.
Spark Plug Replacement:
Every 50-100 operating hours or as needed based on inspection.
Clutch Inspection:
Recommended before each riding season and periodically during the season for belt wear and roller condition.
Track Tension Adjustment:
Check and adjust every 500 miles or as needed.
Coolant Type:
Ethylene glycol-based antifreeze (50/50 mix with distilled water) - Typically Yamaha Super Coolant or equivalent.
Brake Fluid Type:
DOT 3 or DOT 4 hydraulic brake fluid.
Gearbox Oil Type:
Yamalube Gear Oil, SAE 80W-90 API GL-4 or GL-5, or equivalent.
Clutch Wear:
Clutch belt wear and roller/button wear are common maintenance items due to high stress.
Suspension Bushings:
Wear in suspension pivot bushings can lead to sloppy handling and premature wear on other components.
Carburetor Tuning:
Carburetors may require re-jetting or cleaning due to altitude or fuel quality changes.
