Welcome to the 1972 Yamaha JT2 Forum. The factory Yamaha color was called "Mandarin Orange". The USA Vin Range was JT1-300101 to 330000. Feel free to post anything related to this model in the category. Anything new, will be added to this section. If you see any errors, please contact me privately.

                  1972 Yamaha JT2

            Model 1972 Yamaha JT2

   Dimensions:

Overall Length 62 In. / 1,574MM

Overall Width 27.6 In. / 700MM

Overall Height 36.6 In. / 930MM

Wheelbase 41.5 In. / 1,055 MM

Min. Ground Clearance 6.3 In. / 160MM

    Weight:

Gross 132 LBS / 60KG

Net -

   Performance:

Max, Speed -

Fuel Consumption 176 mpg @ 19MPH

(On paved level roads)

Climbing Ability 22 degrees

Min. Turning Radius 59.1 In. / 1500MM

Braking Distance 24.6 Ft. @ 22 MPH (7.5M @ 35Km/h)

   Engine:

Model JT1

Type 2 Stroke, Gasoline

Lubricating System Separate (Yamaha Autolube)

Cylinder Single, forward inclined 5 Port

Displacement 3.54 cu. in. (58cc)

Bore X Stroke 1.654 X 1.654 In. (42MM X 42MM)

Compression Ratio 6.4:1

Max Power 4.5 BHP/7,500 RPM

Max Torque 3.62 Ft.-Lbs @ 5,500 RPM                        

Piston Skirt Clearance .0016 - .0018 In. / 0.40 - 0.45MM                                         

Starting System Primary-Coupled Kick

Ignition Timing B.T.D.C 1.8 MM

NGK Spark Plug & Gap B-7HS 0.5 MM (0.023 in)

Contact Break Point Gap 0.012 - 0.015 Inch / 0.3 - 0.4 MM

Volt Reg. Adjustment -

(Volts @ RPM - No load)

Cutout Relay Adjustment -

Condenser Capacity .22UF (Microfarad)

   Carburetor:

Type Y16P Teikei / ID 288E1

Main Jet # 86

Jet Needle /Clip position 032-2

Air Jet -

Needle Jet 2.085

Cut Away 1.5

Pilot Jet (#) 38

Air Screw (turns out) 1 1/2

Starter Jet (#) 50

Float Level -

  Intake:

Air Cleaner Wet, Foam Rubber

   Transmission:

Clutch Wet, Multiple Disk

Primary reduction system Helical Gear

Primary reduction ratio 3.895 / (74/19) Teeth

Trans Oil Capacity .085 Quarts / 800 - 850cc

   Gear Box:

Type Constant Mesh, 4 Speed Forward

1st Gear teeth & Ratio 3.077 (40/13) (reduction 37.7)

2nd Gear teeth & Ratio 1.889 (34/18) (reduction 23.1)

3rd Gear teeth & Ratio 1.304 (30/23) (reduction 16.0)

4th Gear teeth & Ratio 1.038 (27/26) (reduction 12.1)

5th Gear teeth & Ratio -

Secondary reduction system Chain

Secondary reduction ratio 3.153 (41/13)

  Chassis:

Frame Tubular-Double Loop

Front Suspension System Front Telescopic fork

Rear Suspension System Swinging Arm

Fork Oil Capacity (R) 97cc (3.3 once) (L) 120cc (4.1 once)

Front Cushion System Coil Spring / Oil Damper

Rear Cushion System Coil Spring / Oil Damper

  Steering System:

Steering Angle 47 Degrees both left & right

Caster 63.5 Degrees

Trail 2.7 In. / 68MM

  Braking System:

Type of brake Internal Expansion

Front Operation System Right hand operation

Rear Operation System Right foot operation

  Tire Size:

Front 2.50 - 15 - 4PR Knobby

Rear 2.50 - 15 - 4PR Knobby

Front Tire Pressure 22.4 P.S.I

Rear Tire Pressure 28 P.S.I

  Oil Pump:

Adjustment Stroke Min 0.20 - 0.25 MM

Adjustment Stroke Max 1.85 - 2.05 MM

  Dynamo:

Model F11-L46

Manufacturer Hitachi

  Battery:

Model -

Manufacturer -

Capacity -

 Lighting:

Head Light -

Tail Light -

Stop Light -

Meter Light -

High Beam Indicator Light -

  Tanks:

Gasoline Tank Capacity 1.13 Gallons (4.3 Liters)

Oil Tank Capacity 1.0 Quarts (1.0 Liters)

  Chain:

Tension (Up & down free play) 25MM

The 1972 Yamaha JT2 Rider's Manual is located: CLICK HERE

The Canada 1972 Yamaha JT2L Rider's Manual is Located: CLICK HERE

The 1972 Yamaha JT2 Service Manual is Located: CLICK HERE

The 1972 Yamaha JT2 Combined Service Manual is Located: CLICK HERE

The 1972 Yamaha JT2 Assembly Manual is located: CLICK HERE

The 1972 Yamaha JT2 Parts Manual is located: CLICK HERE

The 1972 Yamaha JT2 racing information is Located: CLICK HERE

The 1972 Yamaha JT2 horse power modification information is Located: CLICK HERE

The 1972 Yamaha Enduro line up advertisement is located: CLICK HERE

The 1972 Yamaha JT2 advertisement is located: CLICK HERE

The 1972 Yamaha JT2 advertisement # 2 is located: CLICK HERE

The 1972 Yamaha JT2 advertisement # 3 is located: CLICK HERE

The 1972 Yamaha JT2 advertisement # 4 is located: CLICK HERE

The 1972 Yamaha JT2L advertisement # 5 is located: CLICK HERE

The 1972 Yamaha JT2L advertisement # 6 is located: CLICK HERE

The 1972 Yamaha line up flyer is located: CLICK HERE

The 1972 USA Yamaha full Line Up Brochure is Located: CLICK HERE

The 1972 Canada Yamaha line up brochure is located: CLICK HERE

The USA 1972 Yamaha JT2 Brochure is Located: CLICK HERE

The 1972 Yamaha dealership crates photo is located: CLICK HERE

The 1972 Yamaha JT2 Trading Card is located: CLICK HERE

The 1972 Yamaha JT2 Store is located above