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74 YZ125A Specifications

Model

YZ 125A

 

Year

1974

 74 yz125A

Frame/Engine Prefix   (XXX-000101)

453

Engine Type

2 stroke

Bore (mm)

56

Stroke (mm)

50

Capacity (cc)

123

Compression Ratio (to 1)

8.0

Bhp @ rpm

15.3 @ 9,500

Model Notes

Torque (kgm) @ rpm

1.27 @ 8,000

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

Oil System

Premix

Engine Cooling

Air

Carburetor (mm)

VM28SS

Ignition System

CDI

Ignition Timing (mm)

2.0

Primary drive gearing

3.89

Final Drive Gearing

47/14

Box Gearing first

2.83

Box Gearing second

2.07

Box Gearing third

1.61

Box Gearing fourth

1.32

Box Gearing fifth

1.14

Box Gearing sixth

-

Fuel Cap. (liters)

5.5

Engine Oil Cap. (liters)

-

Gearbox Oil Cap. (Liters)

.65

Fork Oil Ca. (cc/leg)

135

Front Tire (stock)

2.75-21

Rear Tire (stock)

3.50-18

Front Brake

SLS DRUM

Rear Brake

SLS DRUM

Rear Suspension

Twin shock

Front Susp. Travel (mm)

 

Rear Susp. Travel (mm)

 

Rake (degrees)

30

Trail (mm)

140

Width (mm)

925

Ground Clearance (mm)

260

Wheelbase (mm)

1345

 

Dry Weight (kg)

80

   
   

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