| Engine: |
Specification, Units: mm (in) |
| Cylinder arrangement: |
4 cylinders in-line, inclined 30° from vertical |
| Bore and stroke: |
67.0 x 46.0 mm (2.64 x 1.81 in) |
| Displacement: |
649 cm³ (39.6 cu-in) |
| Cylinder compression at rpm: |
1,500 kPa (15.3 kgf/cm2, 218 psi) at 300 rpm |
| Standard: |
0.010 – 0.045 (0.0004 – 0.0018) |
| Service Limit: |
0.10 (0.004) |
| Intake: |
0.20 ± 0.03 (0.008 ± 0.001) |
| Exhaust: |
0.28 ± 0.03 (0.011 ± 0.001) |
| Recommended engine oil/classification/viscosity: |
Pro Honda GN4 4-stroke oil/API: SG or higher, JASO T 903 standard: MA/SAE 1 |
| Oil capacity after draining/engine oil filter change: |
2.9 liters (3.1 US qt) |
| Oil pressure at oil pressure switch: |
490 kPa (5.0 kgf/cm², 71 psi) at 5000 rpm/80°C (176°F) |
| Final Drive: |
Specification |
| C/S sprocket: |
15 |
| Rear sprocket: |
42 |
| Drive chain size (x) links: |
525 x 118 |
| Drive chain slack: |
25 – 35 (1.0 – 1.4) |
| Cooling System: |
Specification |
| Recommended antifreeze/concentration: |
Pro Honda HP Coolant/1:1 (mixture with distilled w |
| Coolant capacity,radiator and engine: |
2.5 liters (2.6 US qt, 2.2 Imp qt) |
| Fuel System: |
Specification |
| Type/throttle bore: |
32 mm (1.3 in) |
| Carburtetor/throttle body ID #: |
49 State Type: GQ8GC / 50 State Type: GQ8GB |
| Idle speed (+/- 100 rpm): |
1,250 ± 100 rpm |
| Fuel pressure at idle: |
343 kPa (3.5 kgf/cm2, 50 psi) |
| Starter valve vacuum difference: |
N/A |
| Throttle grip/lever free play: |
2 – 6 mm (0.08 – 0.24 in) |
| Suspension: |
Specification |
| Recommended fork fluid: |
Pro Honda Suspension Fluid SS-47 (10W) |
| Fork fluid capacity/and level: |
505 ± 2.5 cm3 (17.1 ± 0.08 US oz) |
| Tires: |
Specification |
| Front Size: |
120/70ZR17M/C (58W) |
| Cold tire pressure: |
250 kPa (2.50 kgf/cm², 36 psi) |
| Rear Size: |
180/55ZR17M/C (73W) |
| Cold tire pressure: |
290 kPa (2.90 kgf/cm², 42 psi) |
| Battery/Charging System: |
Specification |
| Charging system type: |
Triple phase output alternator |
| BatteryCapacity/Model: |
12 V – 8.6 Ah / FTZ10S, Y |
| Fully charged: |
13.0 – 13.2 V |
| Needs charging: |
Below 12.4 V |
| Normal: |
0.9 A/5 – 10 h |
| Quick: |
4.5 A/1 h |
| Regulated voltage at rpm: |
Measured BV < Measured CV < 15.5 V at 5000 rpm |
| Alternator charging coil resistance: |
0.1 – 1.0 O |
| Lighting Equipment: |
Specification |
| Hi: |
12 V – 60W |
| Lo: |
12 V – 55 W |
| Brake/tail light: |
LED |
| Front turn signal/running light bulb: |
12 V – 21/5 W |
| Rear turn signal light bulb: |
12 V – 21 W |
| Ignition System: |
Specification |
| Ignition system type: |
Full transistorized ignition |
| Ignition timing (F mark): |
5° BTDC at idle speed |
| Standard – NGK: |
CR9EH-9 |
| DENSO: |
U27FER9 |
| Spark plug gap: |
0.80 – 0.90 mm (0.031 – 0.035 in) |
| Ignition coil peak voltage: |
100 V minimum |
| Ignition pulse generator peak voltage: |
0.7 V minimum |
| Torque value: |
Specification, Unit: N.m (kgf.m, lbf.ft) |
| Front axle bolt/nut: |
59 (6.0, 44) |
| Front axle holder/pinchbolt/nut: |
22 (2.2, 16) |
| Rear axle nut: |
98 (10.0, 72) |
