| Engine Configuration |
Inline Four, 4-Stroke |
| Engine Displacement |
998 cc |
| Engine Cooling |
Liquid |
| Compression Ratio |
12.9:1 |
| Combustion Chamber Design |
Pentroof |
| Valves Per Cylinder |
4 |
| Intake Valves Per Cylinder |
2 (Titanium) |
| Exhaust Valves Per Cylinder |
2 (Titanium) |
| Bore x Stroke |
76 mm x 55 mm |
Conecting Rod Length
(center-to-center) |
106.65 mm |
| Connecting Rod Material |
Steel |
| Measured Peak Horsepower |
164.18 bhp @ 11,950 rpm |
| Measured Peak Torque |
76.78 lbs. - ft. @ 8,750
rpm |
| Measured Horsepower-to-weight Ratio |
2.79 pounds per horsepower |
| Engine Redline |
13,000 rpm |
| Valve Angle (Included) |
12 degrees Intake/
13 degrees Exhaust (25 degrees) |
| Combustion Chamber Volume |
21 cc |
| Valve Train Type |
DOHC, Gear and Roller Chain Drive, Bucket Followers, Shim-under-bucket Lash Adjustment |
| Valve Adjustment Interval |
15,000 miles |
| Intake Valve Diameter |
30 mm |
| Exhaust Valve Diameter |
24.5 mm |
| Intake Valve Stem
Diameter |
4.5 mm |
| Exhaust Valve Stem Diameter |
4.5 mm |
| Intake Valve Maximum
Lift |
9.7 mm |
| Exhaust Valve Maximum
Lift |
8.5 mm |
| Intake Valve Timing |
|
| Open BTDC |
35 degrees |
| Close ABDC |
77 degrees |
| Duration |
292 degrees |
| Exhaust Valve Timing |
|
| Open BBDC |
62 degrees |
| Close ATDC |
38 degrees |
| Duration |
280 degrees |
| Valve Timing Measuring
Point |
0.2mm Intake, 0.3 mm Exhaust (lift)
|
| Fuel Delivery System |
Keihin Fuel Injection |
| Throttle Body Venturi
Size |
43 mm |
| Air Filter Type |
Pleated Paper |
| Exhaust System Type |
4-2-1 (Titanium) |
| Ignition System |
Digital |
| Lubrication System |
Wet Sump |
| Oil Capacity |
4.2 quarts (4.0 liters) |
| Fuel Capacity |
4.5 gallons (17.0 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) |
87/54 (1.611:1) |
| Final Drive Sprocket Teeth
(Ratio) |
41/17 (2.412:1) |
| Transmission Gear Teeth (Ratios) |
|
| 6th |
30/23 (1.304:1) |
| 5th |
28/20 (1.400:1) |
| 4th |
31/20 (1.550:1) |
| 3rd |
33/19 (1.737:1) |
| 2nd |
39/19 (2.053:1) |
| 1st |
39/15 (2.600:1) |
| Transmission Overall
Ratios |
|
| 6th |
5.385:1 |
| 5th |
5.780:1 |
| 4th |
6.399:1 |
| 3rd |
7.171:1 |
| 2nd |
8.474:1 |
| 1st |
10.734:1 |
| |
|
