S81 Piston
(Tiba)
| Description | Unit | S81 Piston |
| Diameter | mm | 75.5 |
| Crown Shape | – | Asymmetric Concave |
| Pin Hole Diameter | mm | 20 |
| 1st Ring Groove Width | mm | 1.2 |
| 2nd Ring Groove Width | mm | 1.2 |
| Oli Ring Groove Width | mm | 2 |
| Compression Height | mm | 28.7 |
| Piston Height | mm | 46 |
| Material | – | Aluminum Alloy |
| Coating | – | Graphite |
| Diameter Grades | – | Standard (A , B) Oversize One (A , B) Oversize Two (A , B) Oversize Three (A , B) |
| Weight Grades | – | – |
| Trigger Ring | – | No |
| Strut | – | No |
| Description | Unit | S81 Engine |
| Model | – | S81 |
| Number of Cylinders | – | 4 |
| Cylinder Diameter | mm | 75.5 |
| Fuel | – | Gasoline |
| Compression Ratio | – | 9.5 |
| Power | hp | 87 |
| Volume | cc | 1497 |
| Torque | nm @ rpm | 6000 @ 128 |
| Number of Valves | – | 8 |
