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 |
|
|