1984 - 1990
YAMAHA YZ 490
Piston
| WOSSNER
Fits to:
YAMAHA YZ 490 [1984 - 1990]
Specifications
| Manufacturer | WOSSNER |
|---|---|
| Piston diameter | 86.92 mm |
| Bore size | 87.42mm +0.50mm |
| Bore size | 87.00mm |
| Oversize | +1.00mm |
| Piston diameter | 88.42 mm |
| Oversize | 1.5mm |
| Bore size | 88.2mm |
| Oversize | 2mm |