1986 - 2005
YAMAHA YFM 400 BIG BEAR
Piston
| WOSSNER
Fits to:
YAMAHA BIG BEAR [1986 - 2005]
Specifications
| Manufacturer | WOSSNER |
|---|---|
| Piston diameter | 82.94 mm |
| Compression ratio | 10.50:1 (+1.30 nominal) |
| Piston diameter | 82.95 mm |
| Compression ratio | 10.50:1 |
| Oversize | +1.30 |
| Piston diameter | +0.50=83.44 mm |
| Compression ratio | 10.63:1=+1.43 |
| Piston diameter | 83.94 mm |
| Compression ratio | 10.77:1 (+1.57) |
| Oversize | +1.00 |