| Engine Configuration |
Inline Four,
4-Stroke, DOHC |
| Engine Displacement |
749 cc |
| Engine Cooling
System |
Liquid |
| Compression
Ratio |
12.0:1 |
| Combustion
Chamber Design |
Twin Swirl
Combustion Chamber |
| Valves Per
Cylinder |
4 |
| Intake Valves Per Cylinder |
2 |
| Exhaust Valves Per Cylinder |
2 |
| Bore x Stroke |
72 x 46
mm |
| Measured
Peak Horsepower |
138 bhp @ 12,500
rpm |
| Measured
Peak Torque |
63 lbs. - ft.
@ 10,500 rpm |
| Measured Power To Weight
Ratio |
3.38 pounds per horsepower |
| Engine Redline |
14,000 rpm |
| Valve Angle (Included) |
12 degrees intake,
13 degrees exhaust (25 degrees) |
| Combustion Chamber
Volume |
17 cc |
| Valve Train Type |
DOHC, Link-plate
Chain Drive,
Bucket Followers, Shim-under-bucket
Lash Adjustment |
| Valve Adjustment
Interval |
15,000 miles |
| Intake Valve
Diameter |
29 mm |
| Exhaust
Valve Diameter |
24 mm |
| Intake Valve
Stem Diameter |
4.0 mm |
| Exhaust
Valve Stem Diameter |
4.0 mm |
| Intake Valve
Maximum Lift |
8.7 mm |
| Exhaust
Valve Maximum Lift |
7.3 mm |
| Intake Valve
Timing |
|
| Open BTDC |
31 degrees |
| Close ABDC |
71 degrees |
| Duration |
282 degrees |
| Exhaust
Valve Timing |
|
| Open BBDC |
51 degrees |
| Close ATDC |
32 degrees |
| Duration |
263 degrees |
| Valve Timing
Measuring Point |
0.3 mm. |
| Fuel Delivery
System |
Keihin Fuel
Injection |
| Throttle
Body Venturi Size |
42 mm |
| Air Filter
Type |
Pleated
Paper |
| Exhaust
System Type |
4-1 |
| Ignition
System |
Digital
Electronic |
| Lubrication
System |
Wet Sump |
| Oil Capacity |
3.6 quarts (3.4
liters) |
| Fuel Capacity |
4.8 gallons
(18.0 liters) |
| Transmission
Type |
6-speed,
Constant Mesh |
| Clutch Type |
Multi-plate,
Wet |
| Clutch Actuation System |
Cable |
| Clutch Spring Type |
Coil |
| Number Of Clutch Springs |
5 |
| Number of
Clutch Plates |
17 |
| Drive Plates |
10 |
| Driven Plates |
9 |
| Primary
Drive |
Gear |
| Primary
Drive Gear Teeth (Ratio) |
42/ 78 (1.857:1) |
| Final Drive
Sprocket Teeth (Ratio) |
17/ 42 (2.471:1) |
| Transmission
Gear Teeth (Ratios) |
|
|
6th
|
26/ 22 (1.182:1) |
|
5th
|
30/ 23 (1.304:1) |
|
4th
|
29/ 20 (1.450:1) |
|
3rd
|
37/ 22 (1.682:1) |
|
2nd
|
39/ 19 (2.053:1) |
|
1st
|
39/ 14 (2.786:1) |
| Transmission
Overall Ratios |
|
|
6th
|
5.424:1 |
|
5th
|
5.984:1 |
|
4th
|
6.654:1 |
|
3rd
|
7.718:1 |
|
2nd
|
9.420:1 |
|
1st
|
12.784:1 |
