1974 ATC70 K1 Specifications

General Specs
ModelATC70 K1
Model CodeATC70
Product Code957
Frame VIN LocationStamped on left side of frame neck
Engine Serial LocationStamped on bottom of left crankcase cover
Frame Starting NumberATC70-1100001
Engine Starting NumberATC70E-1100001
Owner Manual3193702
Service Manual6193704
Length1300 mm (51.2 in)
Width800 mm (31.5 in)
Height785 mm (30.9 in)
Seat Height570 mm (22.4 in)
Wheelbase895 mm (35.2 in)
Ground Clearance90 mm (3.5 in)
Curb Weight77 kg (169.8 lb)
Dry Weight74 kg (163.2 lb)
Caster Angle23°
Trail32 mm (1.26 in)
Tire & Rim
Front Tire Size (HxW-R)16x8-7
Rear Tire Size (HxW-R)16x8-7
Engine TypeOHC single cylinder 4 stroke air cooled
Cylinder ArrangementSingle cylinder inclined 80 degrees from vertical
Valve TrainOverhead camshaft - chain drive
Displacement72 cc (4.4 ci)
Bore47 mm (1.9 in)
Stroke41.4 mm (1.6 in)
Compression Ratio7.5:1
Cylinder Compression975-1175 kPa (141-170 psi)
Torque0.42 kg/m3 (3 ft-lb)
Starter TypeRecoil
Fuel TypeRegular Gasoline
Oil Capacity - Oil Change0.8 L (0.8 US qt; 0.7 Imp qt)
Drive Train & Transmission
Clutch TypeAutomatic wet multiplate centrifugal
Transmission Type3 Speed
Primary Reduction4.058
First Gear3.273
Second Gear1.722
Third Gear1.190
Final Reduction2.500
Gear Shift Pattern3 - 2 - 1 - N
Identification MarkPB38A
TypePiston valve
Throttle Bore13 mm (0.5 in)
Main Jet#60
Pilot Jet/Slow Jet#35
Pilot Screw Adjustment1 3/4 Turns out
Float Level10.7 mm (0.4 in)
Engine Idle1500 RPM
Air Filter TypeOiled Urethane Foam
Fuel Tank Capacity2.5 L (0.7 US gal; 0.5 Imp gal)
Fuel Tank Reserve0.5 L (0.1 US gal; 0.1 Imp gal)
Ignition TypePoints
Spark PlugC7HS (NGK), U22FS (Denso)
Spark Plug Gap Max0.6-0.7 mm (0.024-0.028 in)
Points Gap Max0.3-0.4 mm (0.012-0.016 in)
Condenser Capacity0.27-0.33 μF
Voltage6 V
Power TypeAC
Alternator Max Output18 W
Rear Brake OperationLeft Hand
Front Brake TypeN/A
Rear Brake TypeDrum
Front SuspensionRigid
Rear SuspensionRigid

Information on this page is provided in good faith that it is accurate, but in no way is the data guanteed to be accurate. If there are any mistakes, please contact me.