| Engine Configuration |
Inline Four, 4-Stroke |
| Engine Displacement |
999 cc |
| Engine Cooling |
Liquid |
| Compression Ratio |
13.0:1 |
| Combustion Chamber Design |
Pentroof |
| Valves Per Cylinder |
4 |
| Intake Valves Per Cylinder |
2 (Titanium) |
| Exhaust Valves Per Cylinder |
2 (Titanium) |
| Bore x Stroke |
80 mm x 49.7 mm |
Conecting Rod Length
(center-to-center) |
103.0 mm |
| Connecting Rod Material |
Steel |
| Measured Peak Horsepower |
184.75 bhp @ 13,150 rpm |
| Measured Peak Torque |
81.06 lbs. - ft. @ 10,250
rpm |
| Measured Horsepower-to-weight Ratio |
2.46 pounds per horsepower |
| Engine Redline |
14,200 rpm |
| Valve Angle (Included) |
11.2 degrees Intake/
13.3 degrees Exhaust (24.5 degrees) |
| Combustion Chamber Volume |
20.5 cc |
| Valve Train Type |
DOHC, Reduction Gear and Link-plate Chain Drive, Finger Followers Shim-in-retainer Lash Adjustment |
| Valve Adjustment Interval |
12,500 miles |
| Intake Valve Diameter |
33.5 mm |
| Exhaust Valve Diameter |
27.2 mm |
| Intake Valve Stem
Diameter |
5.0 mm |
| Exhaust Valve Stem Diameter |
5.0 mm |
| Intake Valve Maximum
Lift |
9.67 mm |
| Exhaust Valve Maximum
Lift |
8.54 mm |
| Intake Valve Timing |
|
| Open BTDC |
2 degrees |
| Close ABDC |
34 degrees |
| Duration |
216 degrees |
| Exhaust Valve Timing |
|
| Open BTDC |
22.5 degrees |
| Close ABDC |
10.5 degrees |
| Duration |
213 degrees |
| Valve Timing Measuring
Point |
3.0 mm (lift)
|
| Fuel Delivery System |
BMW BMS-K-P Fuel Injection |
| Throttle Body Venturi
Size |
48 mm |
| Air Filter Type |
Pleated Paper |
| Exhaust System Type |
4-2-1 (Stainless Steel) |
| Ignition System |
Digital |
| Lubrication System |
Wet Sump |
| Oil Capacity |
4.1 quarts (3.9 liters) |
| Fuel Capacity |
4.6 gallons (17.5 liters) |
| 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 |
19 |
| Drive Plates |
10 |
| Driven Plates |
9 |
| Primary Drive |
Gear (Straight-cut) |
| Primary Drive Gear Teeth (Ratio) |
76/46 (1.652:1) |
| Final Drive Sprocket Teeth
(Ratio) |
44/17 (2.588:1) |
| Transmission Gear Teeth (Ratios) |
|
| 6th |
29/23 (1.261:1) |
| 5th |
34/25 (1.360:1) |
| 4th |
36/24 (1.500:1) |
| 3rd |
38/22 (1.727:1) |
| 2nd |
46/22 (2.091:1) |
| 1st |
45/17 (2.647:1) |
| Transmission Overall
Ratios |
|
| 6th |
5.391:1 |
| 5th |
5.815:1 |
| 4th |
6.413:1 |
| 3rd |
7.384:1 |
| 2nd |
8.940:1 |
| 1st |
11.317:1 |
| |
|
