| Engine Configuration |
Inline Four, 4-stroke |
| Engine Displacement |
998 cc |
| Engine Cooling
System |
Liquid |
| Compression
Ratio |
12.2:1 |
| Combustion
Chamber Design |
Pentroof |
| Valves Per
Cylinder |
4 |
| Intake Valves Per Cylinder |
2 (Steel) |
| Exhaust Valves Per Cylinder |
2(Steel) |
| Bore x Stroke |
75.0 mm x 56.5
mm |
| Claimed Peak Horsepower |
177 bhp @ 10,500 rpm |
| Claimed Peak Torque |
87 lbs. - ft. @ 8,500 rpm |
| Measured
Peak Horsepower |
153.50 bhp
@ 11,450 rpm |
| Measured
Peak Torque |
78.54 lbs.
- ft. @ 8,500 rpm |
| Measured Horsepower-to-weight
Ratio |
2.93 pounds per horsepower |
| Engine Redline |
12,200 rpm |
| Valve Angle (Included) |
11.3 degrees
intake, 12.2 degrees exhaust (23.5 degrees) |
| Combustion
Chamber Volume |
22.3 cc |
| Valve Train
Type |
DOHC, Link-plate
Chain Drive, Bucket Followers, Shim-under-bucket
Lash Adjustment |
| Valve Adjustment
Interval |
16,000 miles |
| Intake Valve
Diameter |
29.0 mm |
| Exhaust
Valve Diameter |
24.0 mm |
| Intake Valve
Stem Diameter |
4.0 mm |
| Exhaust
Valve Stem Diameter |
4.0 mm |
| Intake Valve
Maximum Lift |
9.1 mm |
| Exhaust
Valve Maximum Lift |
8.4 mm |
| Intake Valve
Timing |
|
| Open BTDC |
18 degrees |
| Close ABDC |
46 degrees |
| Duration |
244 degrees |
| Exhaust
Valve Timing |
|
| Open BBDC |
39 degrees |
| Close ATDC |
11 degrees |
| Duration |
230 degrees |
| Valve Timing
Measuring Point |
1.0 mm. |
| Fuel Delivery
System |
Keihin Fuel
Injection |
| Throttle
Body Venturi Size |
44 mm |
| Air Filter
Type |
Dual, Oiled Pleated
Paper |
| Exhaust
System Type |
4-2-1 |
| Ignition
System |
Digital |
| Lubrication
System |
Wet Sump |
| Oil Capacity |
4 quarts |
| Fuel Capacity |
4.8 gallons |
| Transmission
Type |
6-speed,
Constant Mesh, Cassette-type |
| Clutch Type |
Multi-plate,
Wet |
| Clutch Actuation System |
Hudraulic |
| Clutch Spring Type |
Coil |
| Number Of Clutch Springs |
5 |
| Number of
Clutch Plates |
15 |
| Drive Plates |
8 |
| Driven Plates |
7 |
| Primary
Drive |
Gear (Straight-cut) |
| Primary
Drive Gear Teeth (Ratio) |
48/ 77 (1.604:1) |
| Final Drive
Sprocket Teeth (Ratio) |
42/ 16 (2.625:1) |
| Transmission
Gear Teeth (Ratios) |
|
| 6th |
25/ 29 (1.160:1) |
| 5th |
20/ 25 (1.250:1) |
| 4th |
21/ 29 (1.381:1) |
| 3rd |
19/ 30 (1.579:1) |
| 2nd |
17/ 33 (1.941:1) |
| 1st |
13/ 33 (2.538:1) |
| Transmission
Overall Ratios |
|
| 6th |
4.768:1 |
| 5th |
5.138:1 |
| 4th |
6.676:1 |
| 3rd |
6.490:1 |
| 2nd |
7.978:1 |
| 1st |
10.432:1 |
