Engine |
Spark plugs |
| Type | NGK BPR8ES |
| Electrode gap | 0.7 to 0.8 mm |
Valve clearances (COLD engine) |
| Intake | 0.11 to 0.15 mm |
| Exhaust | 0.16 to 0.20 mm |
Engine idle speed |
| 31 A model | 1100 ± 50 rpm |
| All other models | 1050 ± 50 rpm |
Carburettor vacuum at idle speed (synchronisation vacuum range) |
| 31A model | 225 to 235 mm Hg |
| All other models | 215 to 225 mm Hg |
| Cylinder numbering (from left side to right side of the bike) | 1-2-3-4 (4 cylinder) |
| Firing order | 1 -2-4-3 (4 cylinder) |
Cylinder compression |
| Standard | 142 psi (9.8 Bar) |
| Maximum | 171 psi (11.7 Bar) |
| Minimum | 114 psi (7.8 Bar) |
| Maximum difference between cylinders | 14 psi (0.98 Bar) |
Miscellaneous |
Freeplay adjustments |
| Throttle grip | 3 to 7 mm |
| Choke shaft | 2 to 3 mm |
| Front brake lever | 5 to 8 mm |
| Rear brake pedal | 20 to 30 mm |
| Clutch lever | 2 to 3 mm |
| Brake pedal position (distance below top of footrest) | 27 to 33 mm |
| Brake pad minimum thickness (front and rear) | 0.5 mm |
| Tyre pressures (cold) | Front | Rear |
| Up to 198 Ib (90 kg) load | 32 psi (2.3 Bar) | 36 psi (2.5 Bar) |
| Over 198 Ib (90 kg) load | 36 psi (2.5 Bar) | 42 psi (2.9 Bar) |
| High speed riding | 36 psi (2.5 Bar) 42 psi | (2.9 Bar) |
| Tyre tread depth (minimum) - see Daily (pre-ride) checks | >1.6mm | >1.6mm |
|
Front fork air pressure - 31 A model only |
| Standard | 6 psi (0.4 Bar) |
| Minimum | 0 psi (0 Bar) |
| Maximum | 17 psi (1.2 Bar) |
Alternator brush length |
| New | 17mm |
| Service limit | 10 mm |
Torque settings |
| Spark plugs | 20 Nm |
| YICS blanking plug | 22 Nm |
| Oil drain plug | 43 Nm |
| Oil filter housing centre bolt | 15 Nm |
| Valve cover bolts | 10 Nm |
| Steering stem nut | 110 Nm |
| Steering head bearing adjuster nut | 10 to 12 Nm |
| Front brake master cylinder clamp bolts | 9 Nm |
| Front fork top bolt | 23 Nm |
| Top yoke fork clamp bolts | 20 Nm |
| Swingarm pivot bolt (left side) | 100 Nm |
| Swingarm pivot adjuster bolt (right side) | 5 to 6 Nm |
| Swingarm pivot adjuster bolt locknut (right side) | 100 Nm |
| Alternator cover bolts | 12 Nm |
Recommended lubricants and fluids |
| Engine/transmission oil type | API grade SE or SF (minimum) motor oil |
Engine/transmission oil viscosity |
| Winter (temperatures not above 15°C) | SAE10W30 |
| Summer (temperatures not below 5°C) | SAE20W40 |
| Engine/transmission oil capacity |
| Oil change only | 2.5litres |
| Oil and filter change | 2.8litres |
| Following engine overhaul - dry engine, new filter | 3.6 litres |
| Final drive oil type | SAE 80 API GL-4 Hypoid gear oil or SAE 80W90 Hypoid gear oil |
| Final drive oil capacity | 0.2litres |
| Front fork oil type | SAE5W forkoil |
Front fork oil capacity (per fork) |
| 31 A model | 286 ± 4 cc |
| All other models | 276 cc |
Front fork oil level |
| 31 A model | 164 mm* |
| All other models | 348 mm* |
| Brake fluid | DOT 3 or DOT 4 |
| * level is measured from the top of the tube with the fork spring removed and the leg fully compressed. |
Miscellaneous |
| Wheel bearings | Lightweight lithium-soap based grease |
| Rear suspension bearings | Lightweight lithium-soap based grease |
| Cables, lever and stand pivot points | Motor oil |
| Throttle grip | Multi-purpose grease or dry film lubricant |