Welcome to the 1971 Yamaha CT1-C Forum. The Factory color was called Candy Orange. The USA Vin Range was CT1-032101 to 060230. Feel free to post anything related to this model in the category. Anything new, will be added to this section.

                     1971 Yamaha CT1-C Specifications

            Model 1971 Yamaha CT1-C

   Dimensions:

Overall Length 78 In. / 1,980MM

Overall Width 35.8 In. / 910MM

Overall Height 43.7 In. / 1,110MM

Wheelbase 50.8 In. / 1,290MM

Min. Ground Clearance 9.4 In. / 240MM

    Weight:

Gross 232 Lbs. / 105Kg

Net 214 Lbs. / 97Kg

   Performance:

Max, Speed 65 MPH / 105Km/h +

Fuel Consumption 117 MPG @ 31 MPH / 50Km @ 50Km/h

(On paved level roads)

Climbing Ability 32 Degree

Min. Turning Radius 74.8 In. / 1,900MM

Braking Distance 49 Ft. @ 31 MPH (15M @ 50Km/h)

   Engine:

Model CT1

Type 2 Stroke, Gasoline

Lubricating System Separate (Yamaha Autolube)

Cylinder Single, forward inclined 5 Port

Displacement 10.43 cu. in. (171cc)

Bore X Stroke 2.598 X 1.969 In. (66 X 50MM)

Compression Ratio 6.8:1

Max Power 15.6 BHP/7,000 RPM

Max Torque 11.9 Ft.-Lbs/1.65 Kg-m @ 5,500 RPM                        

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

Starting System Primary-Coupled Kick

Ignition Timing B.T.D.C 1.8MM +/- .1MM

NGK Spark Plug & Gap B-8E 0.5-0.6 MM

Contact Break Point Gap 0.012 - 0.015 Inch / 0.30 - 0.40 MM

Volt Reg. Adjustment -

(Volts @ RPM - No load)

Cutout Relay Adjustment -

Condenser Capacity .22UF (Microfard)

   Carburetor:

Type VM24SH

Main Jet # 150

Jet Needle 4D3-3

Air Jet 0.5

Needle Jet N-8

Cut Away 2.0

Pilot Jet (#) 30

Air Screw (turns out) 1 1/2

Starter Jet (#) 40

Float Level 25.5MM

  Intake:

Air Cleaner Wet, Foam Rubber

   Transmission:

Clutch Wet, Multiple Disk

Primary reduction system Helical Gear

Primary reduction ratio 3.894 / (74/19) Teeth

Trans Oil Capacity .80 Qts / 750cc

   Gear Box:

Type Constant Mesh, 5 Speed Forward

1st Gear teeth & Ratio 3.181 (35/11) 34.83

2nd Gear teeth & Ratio 2.000 (30/15) 21.90

3rd Gear teeth & Ratio 1.368 (26/19) 14.98

4th Gear teeth & Ratio 1.000 (23/23) 10.95

5th Gear teeth & Ratio 0.800 (20/25) 8.76

Secondary reduction system Chain

Secondary reduction ratio 2.812 (45/16)

  Chassis:

Frame Tubular-Double Loop

Front Suspension System Front Telescopic fork

Rear Suspension System Swinging Arm

Fork Oil Capacity 160cc (5.4 Oz.)

Front Cushion System Coil Spring / Oil Damper

Rear Cushion System Coil Spring / Oil Damper

  Steering System:

Steering Angle 49 Degrees both left & right

Caster 60 Degrees

Trail 4.84 In. / 123MM

  Braking System:

Type of brake Internal Expansion

Front Operation System Right hand operation

Rear Operation System Right foot operation

  Tire Size:

Front 3.25 - 18 - 4PR Trials Universal

Rear 3.50 - 18 - 4PR Trials Universal

Front Tire Pressure 14 P.S.I

Rear Tire Pressure 17 P.S.I

  Oil Pump:

Adjustment Stroke Min 0.20 - 0.25 MM

Adjustment Stroke Max 1.85 - 2.05 MM

  Dynamo:

Model F130-06

Manufacturer Hitachi Ltd.

  Battery:

Model MV1-6

Manufacturer Furukawa Battery

Capacity 6V 2AH

 Lighting:

Head Light 6V 25W/25W

Tail Light 6V 5.3W

Stop Light 6V 17W

Meter Light 6V 3W X 2

High Beam Indicator Light 6V 1.5W

Flasher Light 6V 17W

  Tanks:

Gasoline Tank Capacity 1.9 Gallons / 7.2 Liters

Oil Tank Capacity 1.3 Quarts / 1.2 Liters

  Chain:

Tension (Up & down free play) 20MM (25/32)

The 1971 Yamaha CT1-C Rider's Manual is Located: CLICK HERE

The 1971 Yamaha CT1-C Service Manual is Located: CLICK HERE

The 1971-1973 Combined Service Manual is Located: CLICK HERE

The 1969-1971 Yamaha AT/CT Combined Service Manual is Located: CLICK HERE

The 1969 - 1971 Yamaha CT1A/CT1B/CT1C Owner's Manual is located: CLICK HERE

The 1969-1971 Yamaha AT/CT Parts Manual # 1 is Located: CLICK HERE

1971 Yamaha AT/CT Parts Manual # 2 is Located: CLICK HERE

The 1971 Yamaha CT1C Owner's Warranty Card is located: CLICK HERE

The 1971 Yamaha CT1C Sales Slip is located: CLICK HERE

The 1969-1971 Yamaha Autolube Adjustment & Color Codes are Located: CLICK HERE

The Germany 1971 Yamaha Line Up Brochure is Located: CLICK HERE

1971 Yamaha Full Line Up Brochure: CLICK HERE

The 1971 USA Yamaha Enduro Line Up Brochure is Located: CLICK HERE

The 1971 Yamaha CT1-C Article # 1 is Located: CLICK HERE

The 1971 Yamaha CT1-C Article # 2 is Located: CLICK HERE

The 1971 Yamaha CT1-C Advertisement # 1 is Located: CLICK HERE

The USA 1971 Yamaha CT1-C Brochure is Located: CLICK HERE

The 1971 Yamaha CT1-C Factory Dealership Poster is located: CLICK HERE

The Canada 1971 Yamaha Line Up Brochure is located: CLICK HERE

The 1971 Motorcycle & Trail Bike Handbook is located: CLICK HERE

1971 Yamaha CT1C Parts CLICK HERE