Norton Commando Workshop Manual

## Technical Data

# A

|  | Tyre size: 4.1OX19 Tyre pressure: 26 Ibs./psi (1.83 kg/sq. cm.). Refer "Tyre Pressures" section for permissible variation Tyre diameter (Dunlop): 26.46 in. (672 mm) Sectional width (Dunlop): 4 in. (101.6 mm)
| Front brake (drum)
|  | Type: Internal expanding two leading shoe Drum dia.: 8 in. (203.2 mm) Lining area - total 2 Shoes: 18.69 sq. in./474.776 sq. mms
| Front brake (disc)

Type: Disc- hydraulically operated
Pad type: Steel backed, mouided and bonded friction material
Pad friction area diam.: 1.65 in. (41.9 mm)
Pad new thickness (Pad and backing together): .38/.37 in. (9.652/9.398 mm)
Disc diameter: 10.70 in. (271.7 mm)
Disc width at friction area: 0.260/0.250 in. (6.604/6.35 mm)
Brake fluid type: Lockheed series 329 Hydraulic Fluid for disc brakes. (Complies with U.S. Safety Standard 116)

| Rear wheel
|  | Rim size: WM2 - 19
|  | Spokes: | Rear outer: 6.093 in. Iong: 8/10 SWG: 90° head: offset length .531 in. (13.45 mm)
|  |  | Rear inner: 6.093 in. Iong: 8/10 SWG: 90° head: offset length .375 in. (9.5 mm)
|  | Wheel bearings 1971 on: Ball journal 17 mm x 40 mm x 12 mm Sprocket bearing: NM.17721: post 1971 Hub bearing housing I.D.: 1.5732/1.5740 in. (39.95 mm/39.97 mm) Tyre size: 4.10 x 19 in.
|  | Tyre pressure: | 26 Ibs./psi (1 83 kg/sq. cm.). Refer "Tyre Pressure" section for permissible variation
|  | Tyre diameter (Dunlop): 26.46 in. (672.084 mm) Tyre sectional width (Dunlop) :4 in. (101.6 mm)
| Rear brake
|  | Internal drum dia.: 7.007/6.997 in. (177.8 mm) Lining area - total 2 Shoes: 13.6 sq. in./345.44 sq. mm.
| Front forks
|  | Type: Telescopic, hydraulically damped, internal springs Main tube O.D.: 1.3590/1.3575 in. (34.29 mm/34.467 mm) Top bush fitted I.D.: 1.3595/1.3605 in. (34.53/34.48 mm) Bottom bush O.D.: 1.4980/1.4990 in. (38.05 mm/38.075 mm) Fork slider I.D.: 1.4995/1.5010 in. (38.087/38.125 mm)
|  | Spring - | No. of coils: 75 1/2 approx.
|  |  | Free length: 18.687 in. (474.65 mm) Rate: 36.5 Ib./in. Red paint marked
|  | Steering crown lug and stem
|  |  | Stem diam. at bearing areas: .9840/.9836in. (24.97/24.96 mm) Pre 1971 - Head race adjuster nut size: 1.3125/1.3005 in. across flats (33.33/33.03 mm) Fork tube top nut hexagon size: 1.3125/1.3005 in. (33.33/33.03 mm) Head bearing spacer length: 5.06 in. (128.5 mm)
|  | Fork leg capacity: 150 cc (5 fl. oz.) each leg Total fork movement: 6 in. (15.24 cm)

### ELECTRICAL

|  | System voltage: 12 volt - Positive earth Alternator type: RM 21 Rectifier type: 2 DS 506 Zener diode type: Z D 715 Battery type : PUZ5A Lucas

<< | < | rocbo.net | >