Valspar 85201 gloss Exotic Sea at a Lowes

Intro

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

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

Parts Catalog  Service Manual

The Honda Super Cub and its varients: 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."

Keihin Stock Carburetor 1981 Honda c70 Passport

Keihin PB32C Specifications
Venturi Dia. 14mm (0.55")
Identification # PB32C
Float level 10.7mm (0.42")
Main Jet #88
Slow Jet #35
Jet Needle 72 C
Pilot Screw turn-out 2.5

Electrical problems can pop up at any time and can seem hard to fix but they really aren't. Most of the time, anyway. Most everything can be "Proved" (tested) with an Ohmmeter and a some things can be proved with a simple circuit tester.