| Engine Configuration |
Inline Four, 4-stroke |
| Engine Displacement |
998 cc |
| Engine Cooling
System |
Liquid |
| Compression
Ratio |
12.7:1 |
| Combustion
Chamber Design |
Pentroof |
| Valves Per
Cylinder |
4 |
| Intake Valves Per Cylinder |
2 (Titanium) |
| Exhaust Valves Per Cylinder |
2 (Steel) |
| Bore x Stroke |
77 mm x
53.6 mm |
| Claimed Peak Horsepower |
178 bhp @ 12,500 rpm |
| Claimed Peak Torque |
82 lbs. - ft. @ 10,000 |
| Measured
Peak Horsepower |
158.90 bhp
@ 12,050 rpm |
| Measured
Peak Torque |
76.45 lbs.
- ft. @ 9,550 rpm |
| Measured Horsepower-to-weight
Ratio |
2.89 pounds per horsepower |
| Engine Redline |
13,750 rpm |
| Valve Angle (Included) |
11.5 degrees
intake, 12.5 degrees exhaust (24 degrees) |
| Combustion
Chamber Volume |
22.6 cc |
| Valve Train
Type |
DOHC, Link-plate
Chain Drive, Bucket Followers, Shim-under-bucket
Lash Adjustment |
| Valve Adjustment
Interval |
26,600 miles |
| Intake Valve
Diameter |
31 mm |
| Exhaust
Valve Diameter |
25 mm |
| Intake Valve
Stem Diameter |
5 mm |
| Exhaust
Valve Stem Diameter |
4.5 mm |
| Intake Valve
Maximum Lift |
9.2 mm |
| Exhaust
Valve Maximum Lift |
8.3 mm |
| Intake Valve
Timing |
|
| Open BTDC |
37 degrees |
| Close ABDC |
67 degrees |
| Duration |
284 degrees |
| Exhaust
Valve Timing |
|
| Open BBDC |
69 degrees |
| Close ATDC |
33 degrees |
| Duration |
282 degrees |
| Valve Timing
Measuring Point |
0.2 mm Intake,
0.3 mm Exhaust |
| Fuel Delivery
System |
Mikuni Fuel
Injection |
| Throttle
Body Venturi Size |
45 mm |
| Air Filter
Type |
Pleated
Paper |
| Exhaust
System Type |
4-1-2 |
| Ignition
System |
Digital |
| Lubrication
System |
Wet Sump |
| Oil Capacity |
4 quarts |
| Fuel Capacity |
4.8 gallons |
| Transmission
Type |
6-speed,
Constant Mesh |
| Clutch Type |
Multi-plate,
Wet, Back-torque-limiting |
| Clutch Actuation System |
Cable |
| Clutch Spring Type |
Coil |
| Number Of Clutch Springs |
6 |
| Number of
Clutch Plates |
17 |
| Drive Plates |
9 |
| Driven Plates |
8 |
| Primary
Drive |
Gear (Straight-cut) |
| Primary
Drive Gear Teeth (Ratio) |
65/ 43 (1.512:1) |
| Final Drive
Sprocket Teeth (Ratio) |
45/ 17 (2.647:1) |
| Transmission
Gear Teeth (Ratios) |
|
| 6th |
33/ 26 (1.269:1) |
| 5th |
30/ 22 (1.364:1) |
| 4th |
35/ 23 (1.522:1) |
| 3rd |
37/ 21 (1.762:1) |
| 2nd |
33/ 16 (2.063:1) |
| 1st |
38/ 15 (2.533:1) |
| Transmission
Overall Ratios |
|
| 6th |
5.079:1 |
| 5th |
5.459:1 |
| 4th |
6.091:1 |
| 3rd |
7.052:1 |
| 2nd |
8.257:1 |
| 1st |
10.138:1 |
