| Engine Configuration |
Inline Four, 4-Stroke |
| Engine Displacement |
998 cc |
| Engine Cooling |
Liquid |
| Compression Ratio |
13.0:1 |
| Combustion Chamber Design |
Four-lobe, Radial Valve |
| Valves Per Cylinder |
4 |
| Intake Valves Per Cylinder |
2 (Titanium) |
| Exhaust Valves Per Cylinder |
2 (Steel) |
| Bore x Stroke |
76 mm x 55 mm |
Conecting Rod Length
(center-to-center) |
107.3 mm |
| Connecting Rod Material |
Steel |
| Measured Peak Horsepower |
163.77 bhp @ 12,250 rpm |
| Measured Peak Torque |
76.76 lbs. - ft. @ 9,250
rpm |
| Measured Horsepower-to-weight Ratio |
2.87 pounds per horsepower |
| Engine Redline |
13,500 rpm |
| Valve Angle (Included) |
10.25 degrees Intake/
12.5 degrees Exhaust (22.75 degrees) |
| Combustion Chamber Volume |
11.6 cc |
| Valve Train Type |
DOHC, Gear and Roller Chain Drive, Bucket Tappets, Shim-under-bucket Lash Adjustment |
| Valve Adjustment Interval |
7,500 miles |
| Intake Valve Diameter |
30 mm |
| Exhaust Valve Diameter |
25.0 mm |
| Intake Valve Stem
Diameter |
4.5 mm |
| Exhaust Valve Stem Diameter |
4.5 mm |
| Intake Valve Maximum
Lift |
10.3 mm |
| Exhaust Valve Maximum
Lift |
9.0 mm |
| Intake Valve Timing |
|
| Open BTDC |
16 degrees |
| Close ABDC |
60 degrees |
| Duration |
256 degrees |
| Exhaust Valve Timing |
|
| Open BTDC |
48 degrees |
| Close ABDC |
18 degrees |
| Duration |
246 degrees |
| Valve Timing Measuring
Point |
1.0 mm (lift)
|
| Fuel Delivery System |
Magneti Marelli IAW 7BM Digital Fuel Injection |
| Throttle Body Venturi
Size |
49 mm |
| Air Filter Type |
Pleated Paper |
| Exhaust System Type |
4-2-1 (Stainless Steel/Aluminum) |
| Ignition System |
Digital |
| Lubrication System |
Wet Sump |
| Oil Capacity |
3.7 quarts (3.5 liters) |
| Fuel Capacity |
4.5 gallons (17.0 liters) |
| Transmission Type |
6-speed, Constant Mesh, Cassette-type |
| Clutch Type |
Multi-plate, Wet, Back-torque-limiting |
| Clutch Actuation System |
Hydraulic |
| Clutch Spring Type |
Coil |
| Number Of Clutch Springs |
4 |
| Number of Clutch Plates |
19 |
| Drive Plates |
10 |
| Driven Plates |
9 |
| Primary Drive |
Gear (Straight-cut) |
| Primary Drive Gear Teeth (Ratio) |
79/50 (1.210:1) |
| Final Drive Sprocket Teeth
(Ratio) |
41/15 (2.730:1) |
| Transmission Gear Teeth (Ratios) |
|
| 6th |
23/19 (1.210:1) |
| 5th |
29/22 (1.318:1) |
| 4th |
30/20 (1.500:1) |
| 3rd |
31/18 (1.722:1) |
| 2nd |
33/16 (2.062:1) |
| 1st |
37/14 (2.642:1) |
| Transmission Overall
Ratios |
|
| 6th |
5.220:1 |
| 5th |
5.690:1 |
| 4th |
6.470:1 |
| 3rd |
7.427:1 |
| 2nd |
8.894:1 |
| 1st |
11.396:1 |
| |
|
