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Yamaha IT125 Dirt bike Specifications

Yamaha IT125 Dirt bike

The Yamaha IT125 was one of various capacity variations debuted in 1980, with the highest being 490cc. This is referring to the later road trail bikes, not the 1972 pure motocross DT2.

Yamaha IT125 Dirt bike Specifications
Yamaha IT125 Dirt bike Specifications

Whereas the DT models were built as dual-purpose trail bikes with a street bias, the IT series were all-out enduro motorcycles based on vintage Motocross machinery. Lights and a retuned motor for increased mid-range torque at the expense of a lower specific BHP were the only differences.


Yamaha IT125 Specifications

  • Year : 1980 - 81
  • Frame/Engine Prefix   (XXX-000101) : 3R9 – 000101/050101
  • Engine Type : 2 stroke
  • Bore (mm) : 56
  • Stroke (mm) : 50
  • Capacity (cc) : 123
  • Compression Ratio (to 1) : 08.01
  • Bhp @ rpm : 16.87 @ 9,000
  • Torque (kgm) @ rpm : 1.48 @ 8,000
  • Oil System : Pre Mix
  • Engine Cooling : AIR
  • Carburetor (mm) : VM39SC
  • Ignition System : CDI
  • Ignition Timing (mm) :
  • Primary drive gearing : 03.23
  • Final Drive Gearing : 46/12
  • Box Gearing first : 03.09
  • Box Gearing second : 02.07
  • Box Gearing third : 01.50
  • Box Gearing fourth : 01.19
  • Box Gearing fifth : 01.00
  • Box Gearing sixth : .84
  • Fuel Cap. (liters) : 08.05
  • Engine Oil Cap. (liters) :
  • Gearbox Oil Cap. (Liters) : .65
  • Fork Oil Ca. (cc/leg) :
  • Front Tire (stock) : 3.00X21
  • Rear Tire (stock) : 4.10X18
  • Front Brake : SLS DRUM
  • Rear Brake : SLS DRUM
  • Rear Suspension : Monoshock
  • Front Susp. Travel (mm) : 180 (200*)
  • Rear Susp. Travel (mm) : 200
  • Rake (degrees) : 28.05.00
  • Trail (mm) : 120
  • Width (mm) :
  • Ground Clearance (mm) : 284 (300*)
  • Wheelbase (mm) : 1365
  • Dry Weight (kg) : 92.5 (91.5*)