1981 ATC70 Specifications
| General Specs | |
|---|---|
| Manufacturer | Honda |
| Year | 1981 |
| Model | ATC70 |
| Model Code | TB03 |
| Product Code | 957 |
| Frame VIN Location | Stamped on left side of frame neck |
| Engine Serial Location | Stamped on bottom of left crankcase cover |
| Frame Starting Number | JH3TB030*BC600001 |
| Engine Starting Number | TB03E-2600001 |
| Owner Manual | 3195704 |
| Service Manual | 6193704 |
| Chassis | |
| Length | 1305 mm (51.4 in) |
| Width | 800 mm (31.5 in) |
| Height | 805 mm (31.7 in) |
| Seat Height | 570 mm (22.4 in) |
| Wheelbase | 895 mm (35.2 in) |
| Ground Clearance | 85 mm (3.3 in) |
| Dry Weight | 74 kg (163.2 lb) |
| Caster Angle | 20° |
| Trail | 32 mm (1.26 in) |
| Tire & Rim | |
| Front Tire Size (HxW-R) | 16x8-7 |
| Rear Tire Size (HxW-R) | 16x8-7 |
| Engine | |
| Engine Type | OHC single cylinder 4 stroke air cooled |
| Cylinder Arrangement | Single cylinder inclined 80 degrees from vertical |
| Valve Train | Overhead camshaft - chain drive |
| Displacement | 72 cc (4.4 ci) |
| Bore | 47 mm (1.9 in) |
| Stroke | 41.4 mm (1.6 in) |
| Compression Ratio | 7.5:1 |
| Cylinder Compression | 975-1175 kPa (141-170 psi) |
| Horsepower | 3.5 PS (3.5 hp) |
| Torque | 0.42 kg/m3 (3 ft-lb) |
| Starter Type | Recoil |
| Fuel Type | Regular Gasoline |
| Oil Capacity - Oil Change | 0.8 L (0.8 US qt; 0.7 Imp qt) |
| Engine Dry Weight | 18.95 kg (41.8 lb) |
| Drive Train & Transmission | |
| Clutch Type | Automatic wet multiplate centrifugal |
| Transmission Type | 3 Speed |
| Primary Reduction | 4.058 |
| First Gear | 3.273 |
| Second Gear | 1.722 |
| Third Gear | 1.190 |
| Final Reduction | 2.500 |
| Gear Shift Pattern | 3 - 2 - 1 - N |
| Driveline | Chain |
| Carburetor | |
| Brand | Keihin |
| Identification Mark | PB38A |
| Type | Piston valve |
| Throttle Bore | 13 mm (0.5 in) |
| Main Jet | #58 |
| Pilot Jet/Slow Jet | #38 |
| Air Jet | #150 |
| Pilot Screw Adjustment | 1 3/4 Turns out |
| Float Level | 10.7 mm (0.4 in) |
| Engine Idle | 1500 RPM |
| Air Filter Type | Oiled Urethane Foam |
| Fuel Tank Capacity | 4.3 L (1.1 US gal; 0.9 Imp gal) |
| Fuel Tank Reserve | 0.8 L (0.2 US gal; 0.2 Imp gal) |
| Ignition | |
| Ignition Type | Points |
| Spark Plug | C7HS (NGK), U22FS (Denso) |
| Spark Plug Gap Max | 0.6-0.7 mm (0.024-0.028 in) |
| Points Gap Max | 0.3-0.4 mm (0.012-0.016 in) |
| Condenser Capacity | 0.27-0.33 μF |
| Exciter Coil | 2.43-2.97 Ω |
| Electrical | |
| Voltage | 6 V |
| Power Type | AC |
| Alternator Max Output | 18 W |
| Brakes | |
| Rear Brake Operation | Left Hand |
| Front Brake Type | N/A |
| Rear Brake Type | Drum |
| Suspension | |
| Front Suspension | Rigid |
| Rear Suspension | Rigid |
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.