Description
| Block Height: | 9.780 |
| Bore – Actual: | 4.280 |
| Bore – Oversize: | .030 |
| Compression Height: | 1.120 |
| Compression Ratio – Actual: | 12.2 @ 124cc |
| Cylinder Head: | Open Chamber |
| Displacement: | 489 |
| Dome Volume: | 44.0 |
| Piston Head Type: | Dome |
| Piston Pin Diameter: | 0.990 |
| Ring Set Recommended: | J10008-4280-5 |
| Rod Length: | 6.535 |
| Stroke: | 4.250 |
| Weight – Nominal: | 540 |
