| Engine Configuration | Inline Four, 4-Stroke, DOHC |
| Engine Displacement | 988cc |
| Engine Cooling System | Liquid |
| Compression Ratio | 12.0:1 |
| Combustion Chamber Design | Twin Swirl |
| Valves Per Cylinder | 4 |
|
|
2 (steel) |
|
|
2 (steel) |
| Bore x Stroke | 73.0 x 59.0 mm |
| Claimed Peak Horsepower | 165 bhp @11,400 rpm |
| Claimed Peak Torque | N.A. |
| Measured Peak Horsepower | 15.05 bhp @ 11,500 rpm |
| Measured Peak Torque | 77.7 lbs. -ft. @ 8250 rpm |
| Measured Horsepower-to-weight Ratio: | 2.97 pounds per horsepower |
| Engine Redline | 12,250 rpm |
| Valve Angle (Included) | 25 degrees |
| Combustion Chamber Volume | 22.4cc |
| 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 mm |
| Exhaust Valve Stem Diameter | 4 mm |
| Intake Valve Maximum Lift | 9 mm |
| Exhaust Valve Maximum Lift | 8 mm |
| Intake Valve Timing | |
|
|
37 degrees |
|
|
72 degrees |
|
|
289 degrees |
| Exhaust Valve Timing | |
|
|
53 degrees |
|
|
34 degrees |
|
|
266 degrees |
| Valve Timing Measuring Point | 0.3 mm |
| Fuel Delivery System | Kehin Fuel Injection |
| Throttle Body Venturi Size | 42 mm |
| Air Filter Type | Non-woven Pleated Fabric |
| Exhaust System Type | 4-1 Titanium |
| Ignition System | Digital Electric |
| Lubrication System | Wet Sump |
| Oil Capacity | 3.4 quarts (3.2 liters) |
| Fuel Capacity | 4.8 gallons (18.0 liters) |
| Transmission Type | 6-speed, Constant Mesh |
| Clutch Type | Multi-plate, Wet |
|
|
Cable |
|
|
Coil |
| Number Of Clutch Springs | 5 |
Number of Clutch Plates |
19 |
|
|
10 |
|
|
9 |
| Primary Drive | Gear (straight cut) |
| Primary Drive Gear Teeth (Ratio) | 73/ 47 (1.553:1) |
| Final Drive Sprocket Teeth (Ratio) | 42/ 17 (2.470:1) |
| Transmission Gear Teeth (Ratios) | |
|
|
29/ 24 (1.208:1) |
|
|
30/ 23 (1.304:1) |
|
|
29/ 20 (1.450:1) |
|
|
37/ 20 (1.681:1) |
|
|
39/ 19 (2.052:1) |
|
|
43/ 16 (2.687:1) |
| Transmission Overall Ratios | |
|
|
4.636:1 |
|
|
5.005:1 |
|
|
5.564:1 |
|
|
6.453:1 |
|
|
7.876:1 |
|
|
10.312:1 |
| Theoretical Speed in Gears at Redline | |
|
|
178 mph |
|
|
165 mph |
|
|
148 mph |
|
|
128 mph |
|
|
105 mph |
|
|
80 mph |
| Engine speed at 60 mph | 4114 rpm |