Engine:
Complete engine overhaul, disassembly, assembly, tuning, performance specifications.
Transmission:
Gearbox inspection, repair, clutch service, lubrication.
Fuel System:
Carburetor service, fuel tank, fuel lines, fuel pump (if applicable).
Ignition System:
Spark plugs, ignition timing, CDI unit, stator, wiring.
Cooling System:
Air-cooled engine specifications, heat dissipation.
Suspension:
Front forks (oil, seals, springs), rear shock absorber, linkages.
Brakes:
Front and rear brake systems, hydraulic components, pad/shoe replacement, fluid.
Electrical System:
Wiring diagrams, lighting, battery, charging system, switches.
Frame And Body:
Frame inspection, body panels, seat, handlebars, footpegs.
Wheels And Tires:
Wheel bearing inspection, tire pressure, spoke tension.
Maintenance:
Regular servicing, oil changes, filter replacements, chain adjustment.
Troubleshooting:
Diagnostic guides for common problems, symptom analysis.
Repair:
Detailed step-by-step repair instructions for all major components.
Disassembly And Assembly:
Complete breakdown and reassembly of motorcycle components.
Rebuilds:
Engine, carburetor, and suspension component rebuild procedures.
Adjustments:
Carburetor jetting, ignition timing, clutch, brakes, suspension adjustments.
Depth:
Professional-grade, covering routine maintenance to complete engine rebuilds.
Diagrams:
Hundreds of detailed photos and exploded diagrams.
Diagnostic Codes:
While not typically feature for this era, the manual provides symptom-based troubleshooting.
Engine Type:
2-Stroke, Reed Valve
Bore X Stroke:
66.0 mm x 57.0 mm
Compression Ratio:
6.6:1 (Typical)
Horsepower:
Approx. 20-25 HP (estimated, varies with tuning)
Torque:
N/A (typically not a primary spec for this class)
Carburetor Model:
Mikuni VM28SS (common)
Fuel Type:
Unleaded gasoline with 2-stroke oil premix
Fuel Mix Ratio:
50:1 (Typical, consult manual for exact specification)
Type:
Constant Mesh 6-Speed
Gear Ratios:
Detailed in manual (e.g., 1st: 2.833, 2nd: 2.063, 3rd: 1.556, 4th: 1.250, 5th: 1.045, 6th: 0.917)
Clutch Type:
Wet, multi-plate
Transmission Oil Type:
Yamalube 10W-30 API SG or SAE 80 GL-4 (consult manual)
Oil Change Interval:
Every 1000 km or annually (or as per manual recommendation for engine oil and gearbox oil).
Air Filter Cleaning:
Regularly, especially in dusty conditions (details in manual).
Spark Plug Maintenance:
Inspection and cleaning/replacement as needed, dependent on usage.
Engine Oil:
Yamalube 10W-30 API SG or equivalent (for gearbox, consult manual for exact specification).
Fork Oil:
Yamaha Type 01 (or equivalent SAE 10W fork oil, consult manual for capacity).
Brake Fluid:
DOT 3 or DOT 4 (consult manual for specific type and bleeding procedure).
Carburetor Issues:
Clogging due to fuel degradation, jet wear, or intake air leaks.
Power Valve Operation:
Carbon buildup or sticking of the exhaust power valve mechanism, affecting performance.
Clutch Wear:
Fading or slipping due to excessive use or improper adjustment.
Suspension Leaks:
Seal failure in front forks or rear shock, leading to oil leaks.
Yamaha Motorcycles:
Yamaha Motor Company is renowned for its high-performance motorcycles across various disciplines, including off-road and competition.
It Series:
The IT series represented Yamaha's line of competitive off-road motorcycles, designed for enduro and motocross racing, evolving from earlier DT models.
Production Period:
The IT200 was produced through the 1980s, with the 1986 model being a significant iteration.