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72-73 AT2/AT3 (includes M) Specifications

Model

AT2/AT3(M)

 

Year

1972-1973

 1972YamahaAT2

Frame/Engine Prefix   (XXX-000101)

AT1

Bore (mm)

56

Stroke (mm)

50

Capacity (cc)

123

Compression Ratio (to 1)

7.1 (7.8[1])

Bhp @ rpm

13 @ 7,000 (20 @ 8,5001)

Model Notes

Torque (kgm) @ rpm

1.38 @ 6,000 (1.7 @ 8,0001)

These bikes are 12 volt, electric start and MUST have a fully charged battery to run. They use a different style magneto than the other bikes.

The M models (MX) are 6 volt and kick start only, much like the rest of the endure line.

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

Oil System

Autolube

Engine Cooling

Air

Carburetor (mm)

VM24SH (VM26SC1)

Ignition System

Starter/Dynamo

Ignition Timing (mm)

1.8 (2.01)

Primary drive gearing

3.9

Final Drive Gearing

45/15 (45/141)

Box Gearing first

3.18 (2.831)

Box Gearing second

2.0 (1.861)

Box Gearing third

1.37 (1.371)

Box Gearing fourth

1.0 (1.11)

Box Gearing fifth

0.8 (0.961)

Box Gearing sixth

-

Fuel Cap. (liters)

7

Engine Oil Cap. (liters)

1.23

Gearbox Oil Cap. (Liters)

0.75

Fork Oil Ca. (cc/leg)

120

Front Tire (stock)

3.00 x 18 (2.75 X 211)

Rear Tire (stock)

3.25 x 18 (3.50 X 181)

Front Brake

Drum

Rear Brake

Drum

Rear Suspension

Twin shock

Front Susp. Travel (mm)

 

Rear Susp. Travel (mm)

 

Rake (degrees)

 

Trail (mm)

 

Width (mm)

910

Ground Clearance (mm)

240

Wheelbase (mm)

1,280 (1,2901)

 logosmall

Dry Weight (kg)

100 (921)

   
   

[1] = “M” Model

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