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80-81 IT125 G-H Specifications

Model

IT 125 G/H

 

Year

1980 - 81

 81 Yamaha IT125

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)

8:1

Bhp @ rpm

16.87 @ 9,000

Model Notes

Torque (kgm) @ rpm

1.48 @ 8,000

Pictures only show one year on multi-year bikes. Check VIN tables for colors for your specific year.

Oil System

Pre Mix

Engine Cooling

AIR

Carburetor (mm)

VM39SC

Ignition System

CDI

Ignition Timing (mm)

 

Primary drive gearing

3.23

Final Drive Gearing

46/12

Box Gearing first

3.09

Box Gearing second

2.07

Box Gearing third

1.50

Box Gearing fourth

1.19

Box Gearing fifth

1.00

Box Gearing sixth

.84

Fuel Cap. (liters)

8.5

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)

28.5

Trail (mm)

120

Width (mm)

 

Ground Clearance (mm)

284 (300*)

Wheelbase (mm)

1365

 

Dry Weight (kg)

92.5 (91.5*)

   
 
  • = IT 125H

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