C70 dimensions, torque specifications, model history and more.
Specifications
Honda C70 Specifications
|
|
English |
Metric |
| Dimensions |
Overall Length |
71.1 in. |
1805 mm |
| Overall Width |
26.2 in. |
685 mm |
| Overall Height |
39.2 in. |
995 mm |
| Wheelbase |
46.5 in. |
1180 mm |
| Seat Height |
29.9 in. |
760 mm |
| Min. Ground Clearance |
5.1 in. |
130 mm |
| Dry Weight |
184 lbs. |
83.5 kg |
| Frame |
Type |
Pressed & tube steel type |
| F suspension, travel |
Leading link, travel 2.2 in. (55 mm) |
| R suspension, travel |
Swing arm, travel 2.4 in. (60 mm) |
| F tire size, pressure |
2.25x17-4PR, 28 psi |
2.25x17-4PR, 2.0 kg/cm2 |
| R tire size, pressure |
2.50x17-6PR, 28 psi (40 psi when laden) |
2.50x17-6PR, 2.0 kg/cm2 (2.8 when laden) |
| F brake, lining area |
Cable, Internal expanding shoes, area 13.4 sq-in. (86.4 sq-cm) |
| R brake, lining area |
Rod, Internal expanding shoes, area 13.4 sq-in. (86.4 sq-cm) |
| Fuel capacity |
1.05 US gal./4.0 l. |
| Fuel reserve capacity |
0.21 US gal./0.8 l. |
| Caster angle |
64 deg. |
| Trail length |
2.8 in./ 70 mm |
| Engine |
Type |
Air cooled, 4 stroke OHC engine |
| Cylinder arrangement |
Single cylinder 80 deg inclined from vertical |
| Bore and stroke |
1.850 x 1.630 in. |
47.0 x 41.4 mm |
| Displacement |
4.4 cu-in. |
72cc |
| Compression Ratio |
8.8 : 1 |
| Valve train |
Chain driven overhead camshaft |
| Maximum horsepower |
5.0 BHP at 7000 rpm |
| Maximum torque |
3.9 lb/ft at 5500 rpm |
0.56 kg-m at 5500 rpm |
| Oil capacity |
0.74 US qt. |
0.7 l |
| Lubrication system |
Forced and wet sump |
| Cylinder head compression pressure |
178 +/-7 psi at 1000 rpm |
12.5 +/-0.5 kg/cm2 at 1000 rpm |
| Intake valve opens |
0 deg BTDC |
| Intake valve closes |
20 deg ABDC |
| Exhaust valve opens |
25 deg BBDC |
| Exhaust valve closes |
5 deg ATDC |
| Valve tappet clearance |
IN-EX 0.0002 in. |
IN-EX 0.05mm |
| Idle speed |
1500 +/-100 rpm |
| Carburation |
Carburettor Type |
Piston valve (slide), 14mm (0.55") venturi bore |
| ID. Number |
1980 model: PB32A |
1981 model: PB32C |
| Float Level |
0.42" |
10.7mm |
| Drive Train |
Clutch |
Wet, multi plate, semi-auto centrifugal type |
| Transmisson |
3 speed constant mesh |
| Primary reduction |
4.058 |
| Gear Ratio 1 |
3.272 |
| Gear Ratio 2 |
1.722 |
| Gear Ratio 3 |
1.190 |
| Final reduction |
2.571, drive sprocket XXT, driven sprocket XXT |
| Gear shift pattern |
Left foot operated return system, N-1-2-3 |
| Electrical |
Ignition |
Flywheel magneto |
| Points Gap |
0.012 - 0.016" |
0.3 - 0.4 mm |
| Ignition Timing "F" Mark |
15o BTDC, Static |
| Advance Start |
1875 rpm |
| Full Advance |
30o BTDC, at 2900 rpm |
| Starting System |
Kick starter and/or starter motor |
| Generator |
Flywheel AC generator, 57W at 5000 rpm |
| Battery Capacity |
6 V, 11 Ah |
| Spark plug (normal) |
NGK C7HS or ND U22FS |
| Spark plug (cold climates) |
NGK C6H or ND U20FS |
| Spark plug (high speeds) |
NGK C9H or ND U24FB |
| Spark Plug Gap |
0.024 - 0.028" / 0.6 - 0.7 mm |
| Fuse Capacity |
10 A |
{slider Torque Specifications}
Torque Specifications
|
|
|
|
Torque |
|
Item |
Quantity |
Thread dia. (mm) |
kg-m |
ft-lb |
| Engine |
Cylinder Head Cover |
4 |
6 |
0.9 - 1.2 |
7 - 9 |
| Camshaft Sprocket |
3 |
5 |
0.5 - 0.9 |
4 - 7 |
| Clutch Locknut |
1 |
14 |
3.8 - 4.5 |
28 - 33 |
| Final Drive Sprocket |
2 |
6 |
1.0 - 1.4 |
7 - 10 |
| Flywheel |
1 |
10 |
5.5 - 6.5 |
40 - 47 |
| Spark Advancer |
1 |
6 |
0.9 - 1.2 |
7 - 9 |
| Frame |
Steering Stem Nut |
1 |
22 |
6. 0 - 9.0 |
43 - 65 |
| Handlebar Setting Nut |
2 |
8 |
2.0 - 3.0 |
14 - 22 |
| Steering Lock |
2 |
6 |
0.6 -1.3 |
4 - 9 |
| Front Axle Nut |
1 |
10 |
3.0 - 4.0 |
22 - 29 |
| Engine Hanger Bolt |
2 |
8 |
2.5 - 3.5 |
18 - 25 |
| Rear Axle Nut |
1 |
12 |
4. 0 - 5.0 |
29 - 36 |
| Final Driven sprocket |
4 |
8 |
2.0 - 2.5 |
14 - 18 |
| Rear Brake Torque Link |
2 |
8 |
1.0 - 2.0 |
7 - 14 |
| Rear Shock Absorber |
4 |
10 |
2.0 - 3.0 |
14 - 22 |
| Foot Peg |
4 |
8 |
2.0 - 2.5 |
14 - 18 |
| Swing Arm Pivot Bolt |
1 |
10 |
3.0 - 4.0 |
22 - 29 |
| Front Suspension Pivot Bolt |
2 |
8 |
1.0 - 2.0 |
7 - 14 |
| Front Suspension Pivot Bolt |
2 |
8 |
2.0 - 3.0 |
14 - 22 |
| Front Shock Absorber Upper Bolt |
2 |
8 |
2.5 - 3.5 |
18 - 25 |
| Front Turn Signal Stay |
4 |
|
0.35 - 0.5 |
2.5 - 3.6 |
| General |
5 mm bolt/nut |
|
|
0.45 - 0.6 |
3.3 - 4.3 |
| 6 mm bolt/nut |
|
|
0.8 - 1.2 |
6 - 9 |
| 8 mm bolt/nut |
|
|
1.8 - 2.5 |
13 - 18 |
| 10 mm bolt/nut |
|
|
3.0 - 4.0 |
22 - 29 |
| 12mm bolt/nut |
|
|
5.0 - 6.0 |
36 - 43 |
| 5 mm screw |
|
|
0.35 - 0.5 |
2.5 - 3.6 |
| 6 mm screw |
|
|
0.7 - 1.1 |
5 - 8 |
| 6 mm flange bolt/nut |
|
|
1.0 - 1.4 |
7 - 10 |
| 8 mm flange bolt/nut |
|
|
2.4 - 3.0 |
17 - 22 |
| 10 mm flange bolt/nut |
|
|
3.0 - 4.0 |
22 - 29 |
Manuals
These will open as PDFs
The Honda Super Cub and its variants: C100, C50, C70, C90, C100EX and C70 Passport is the most popular motor vehicle in the world! It has been in continuous manufacture since 1958 with production surpassing 60 million in 2008.
The Super Cub built the Honda Motor company. It is a simple motorcycle with a four stroke single cylinder engine ranging in displacement from 49 to 109 cc (3.0 to 6.7 cu in).
The Super Cub was developed on the concept of a two wheeler for everyman, one that would appeal to both developed and developing countries, urban and rural. The new motorcycle needed to be technologically simple to survive in places without up to date know how and access to advanced tools or reliable spare parts supplies.
Honda partner Takeo Fujusawa's concept required that it could be ridden with one hand while carrying a tray of soba noodles. Fujusawa sold the concept to Soichiro Honda with the promise, "If you can design a small motorcycle, say 50 cc with a cover to hide the engine and hoses and wires inside, I can sell it. I don't know how many soba noodle shops there are in Japan, but I bet you that every shop will want one for deliveries."
