Wheel, Tires And Drive Chain Specifications For Your 1997-2001 Yamaha YZ125
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Front And Rear Wheel Specifications
| Front Tire Size | |
| – 1994 – 1995 | 80/100-21 51M |
| – 1996 – 1998 | 80/100-21 K496 |
| – 1999 – 2001 | 80/100-21 D739F |
| Rear Tire Size | |
| – 1994 – 1995 | 100/90-19 57M |
| – 1996 – 1998 | 100/90-19 K695 |
| – 1999 – 2001 | 100/90-19 D739 |
| Wheel Rim Size | |
| – Front Wheel | 1.60 x 21 Aluminium |
| – Rear Wheel | 1.85 x 19 Aluminium |
| Wheel Rim Runout Limit | |
| – Radial And Axial | 2.0 mm (0.08 in.) |
| Axle Runout Limit | 0.2 mm (0.008 in.) |
Drive Chain And Sprocket Specifications
| Drive Chain Manufacturer | |
| – 1998 – 2000 Europe | Regina 123RX1-A |
| – All Other Models | DAIDO |
| Type | |
| – 1998 – 2000 Europe | 123RX1-A |
| – All Other Models | DID 520DS |
| Number of Chain Links | |
| – 1994 | 114 + Master Link |
| – 1995 – 1996 | 113 + Master Link |
| – 1997 – 2001 | 111 + Master Link |
| Sprocket Sizes (Front/Rear) | |
| – 1994 – 1996 | 13/50 |
| – 1997 – 2001 | 13/48 |
Front And Rear Wheel Torque Specifications
| ft.-lb | in.-lb | N•n | |
| Front Axle | 43 | – | 59 |
| Front Axle Pinch Bolts | – | 80 | 9 |
| Driven Sprocket Nuts | 25 | – | 34 |
| Rear Axle Nut | 85 | – | 115 |
| Drive Sprocket Nut | 43 | – | 60 |
| Spoke Nipple | – | 53 | 6 |
