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 |