| Engine Configuration |
Parallel Twin,
4-Stroke |
| Engine Displacement |
649cc |
| Engine Cooling
System |
Liquid |
| Compression
Ratio |
10.8:1 |
| Combustion
Chamber Design |
Pentroof |
| Valves Per
Cylinder |
4 |
| Intake Valves Per Cylinder
|
2 |
| Exhaust Valves Per Cylinder
|
2 |
| Bore x Stroke |
83.0 mm x 60.0mm |
| Claimed
Peak Horsepower |
|
| Claimed
Peak Torque |
|
| Measured Peak Horsepower |
58.35 bhp @ 8,200 rpm |
| Measured Peak Torque |
41.69 lbs. - ft. @ 6600 rpm |
| Measured Horsepower To Weight
Ratio |
|
| Engine Redline |
10,000 rpm |
| Valve Angle (Included) |
12.0 degrees/13.0
degrees exhaust (25.0 degrees) |
| Combustion
Chamber Volume |
33 cc |
| Valve Train
Type |
DOHC, Link-plate Chain Drive, Shim-under-bucket
Lash Adjustment |
| Valve Adjustment
Interval |
15,000
miles (24,140km) |
| Intake Valve
Diameter |
33.4 mm (steel) |
| Exhaust
Valve Diameter |
28.3 mm (steel) |
| Intake
Valve Stem Diameter |
4.5 mm |
| Exhaust
Valve Stem Diameter |
4.5 mm |
| Intake
Valve Maximum Lift |
7.9 mm |
| Exhaust
Valve Maximum Lift |
7.4 mm |
| Intake
Valve Timing |
|
| Open BTDC
|
26 degrees |
| Close ABDC
|
48 degrees |
| Duration
|
254 degrees |
| Exhaust
Valve Timing |
|
| Open BBDC
|
47 degrees |
| Close ATDC
|
19 degrees |
| Duration
|
246 degrees |
| Valve Timing
Measuring Point |
1 mm |
| Fuel Delivery
System |
Denso/ Keihin Electronic Fuel Injection |
| Throttle Body
Venturi Size |
36 mm |
| Air Filter
Type |
Pleated Paper |
| Exhaust
System Type |
2-into-1, Stainless Steel |
| Ignition
System |
Digital |
| Lubrication
System |
Semi-Dry Sump |
| Oil Capacity |
2.4 quarts (2.3
liters) |
| Fuel Capacity |
4.0 gallons (15.1
liters) |
| Transmission
Type |
6-speed,
Constant Mesh |
| Clutch Type |
Multi-plate,
Wet, Assist & Slipper |
| Clutch Actuation System
|
Cable |
|
Clutch Spring Type
|
Coil |
| Number Of Clutch
Springs |
3 |
Number of Clutch Plates |
13 |
| Drive Plates
|
7 |
| Driven Plates
|
6 |
| Primary
Drive |
Straight-cut |
| Primary Drive
Gear Teeth (Ratio) |
88/42 (2.095:1) |
| Final Drive Sprocket
Teeth (Ratio) |
46/ 15 (3.067:1) |
| Transmission Gear
Teeth (Ratios) |
|
| 6th
|
23/27 (0.852:1) |
| 5th
|
28/29 (0.966:1) |
| 4th
|
30/27 (1.111:1) |
| 3rd
|
32/24 (1.333:1) |
| 2nd
|
36/21 (1.714.1) |
| 1st
|
39/16 (2.438:1) |
| Transmission
Overall Ratios |
|
| 6th
|
5.474: 1 |
| 5th
|
6.207: 1 |
| 4th
|
7.139: 1 |
| 3rd
|
8.565: 1 |
| 2nd
|
11.013: 1 |
| 1st
|
15.665:1 |
| Theoretical Speed in
Gears at Redline |
|
|
6th
|
131 mph |
| 5th
|
115 mph |
| 4th
|
99 mph |
| 3rd
|
83 mph |
| 2nd
|
65 mph |
| 1st
|
46 mph |
