| Engine Configuration |
90 Degree V-Twin,
4-Stroke |
| Engine Displacement |
645cc |
| Engine Cooling
System |
Liquid |
| Compression
Ratio |
11.2:1 |
| Combustion
Chamber Design |
Hemispherical, Twin Swirl |
| Valves Per
Cylinder |
4 |
| Intake Valves Per Cylinder
|
2 (Steel) |
| Exhaust Valves Per Cylinder
|
2 (Steel) |
| Bore x Stroke |
81.0 mm x 62.6mm |
| Claimed
Peak Horsepower |
75.09bhp @ 8,500 rpm |
| Claimed
Peak Torque |
47.2 lbs-ft @8,100 rpm |
| Measured Peak Horsepower |
69.14 bhp @ 8,500 rpm |
| Measured Peak Torque |
43.17 lbs-ft @8,100 rpm |
| Measured Horsepower To Weight
Ratio |
|
| Engine Redline |
10,000 rpm |
| Valve Angle (Included) |
14.0 degrees (Intake)/ 16.0
degrees (Exhaust) (30.0 degrees) |
| Combustion
Chamber Volume |
19.2 cc |
| Valve Train
Type |
DOHC, Link-plate Chain Drive,
Bucket Followers, Shim-under-bucket
Lash Adjustment |
| Valve Adjustment
Interval |
14,500
miles |
| Intake Valve
Diameter |
31 mm |
| Exhaust
Valve Diameter |
25.5 mm |
| Intake
Valve Stem Diameter |
4.5 mm |
| Exhaust
Valve Stem Diameter |
4.5 mm |
| Intake
Valve Maximum Lift |
9.0 mm |
| Exhaust
Valve Maximum Lift |
8.3 mm |
| Intake
Valve Timing |
|
| Open BTDC
|
39 degrees |
| Close ABDC
|
62 degrees |
| Duration
|
281 degrees |
| Exhaust
Valve Timing |
|
| Open BBDC
|
59 degrees |
| Close ATDC
|
28 degrees |
| Duration
|
267 degrees |
| Valve Timing
Measuring Point |
0.3mm (lift) |
| Fuel Delivery
System |
Mikuni SDTV Fuel
Injection |
| Throttle Body
Venturi Size |
39 mm |
| Air Filter
Type |
Pleated Fabric |
| Exhaust
System Type |
2-1, Steel |
| Ignition
System |
Digital |
| Lubrication
System |
Wet Sump |
| Oil Capacity |
2.9 quarts (2.8
liters) |
| Fuel Capacity |
3.8 gallons (14.5
liters) (CA model: 3.6 gallons (13.8 liters) |
| Transmission
Type |
6-speed,
Constant mesh |
| Clutch Type |
Multi-plate,
Wet |
| Clutch Actuation System
|
Cable, Rack & Pinion |
| Clutch Spring Type
|
Coil |
| Number Of Clutch
Springs |
6 |
Number of Clutch Plates |
13 |
| Drive Plates
|
7 |
| Driven Plates
|
6 |
| Primary
Drive |
Gear (Straight-cut) |
| Primary Drive
Gear Teeth (Ratio) |
71/34 (2.088:1) |
| Final Drive Sprocket
Teeth (Ratio) |
46/15 (3.066:1)
|
| Transmission Gear
Teeth (Ratios) |
|
| 6th
|
23/ 27 (0.851:1) |
| 5th
|
25/26 (0.961:1) |
| 4th
|
27/24 (1.125:1) |
| 3rd
|
29/21 (1.380:1) |
| 2nd
|
32/18 (1.777:1) |
| 1st
|
32/13 (2.461:1) |
| Transmission
Overall Ratios |
|
| 6th
|
5.450: 1 |
| 5th
|
6.154: 1 |
| 4th
|
7.204: 1 |
| 3rd
|
8.837: 1 |
| 2nd
|
11.380: 1 |
| 1st
|
15.760:1 |
| Theoretical Speed in
Gears at Redline |
|
| 6th
|
142 mph |
| 5th
|
126 mph |
| 4th
|
107 mph |
| 3rd
|
87 mph |
| 2nd
|
68 mph |
| 1st
|
49 mph |
