Brake System Specifications For Your 1997-2001 Yamaha YZ125
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Brake System Service Specifications
| New mm (in.) | Service Limit mm (in.) | |
| Brake Disc Diameter | ||
| Front | ||
| – 1994 – 2000 | 245 (9.65) | – |
| – 2001 | 250 (9.84) | – |
| Rear | ||
| – 1994 – 1997 | 220 (8.66 | – |
| – 1998 – 2001 | 240 (9.45) | – |
| Brake Disc Thickness | ||
| Front | 3.0 (0.12) | 2.5 (0.10) |
| Rear | ||
| – 1994 – 1997 | 4.5 (0.18) | 4.0 (0.16) |
| – 1998 – 2001 | 4.0 (0.16) | – |
| Disc Runout (Front and Rear) | – | 0.15 (0.006) |
| Brake Pad Thickness | ||
| Front | 4.4 (0.17) | 1.0 (0.04) |
| Rear | ||
| – 1994 – 1997 | 5.6 (0.22) | 1.0 (0.04) |
| – 1998 – 2001 | 6.4 (0.25) | 1.0 (0.04) |
| Front Master Cylinder Bore Inside Diameter | 11.0 (0.443) | – |
| Rear Master Cylinder Bore Inside Diameter | 12.7 (0.500) | – |
| Front Caliper Bore Inside Diameter | 27.0 (1.063) | – |
| Rear Caliper Bore Inside Diameter | ||
| – 1994 – 1997 | 30.23 (1.190) | – |
| – 1998 – 2001 | 27.0 (1.063) | – |
Brake System Torque Specifications
| ft.-lb | in.-lb | N•n | |
| Banjo Bolts | |||
| – 1994 – 1999 | 19 | – | 26 |
| – 2000 – 2001 | 22 | – | 30 |
| Brake Disc Mounting Bolts | |||
| – Front | – | 106 | 12 |
| – Rear | – | 124 | 14 |
| Front Brake Caliper | |||
| – Brake Caliper Mounting Bolts | 17 | – | 23 |
| – Brake Pad Pin Bolts | 13 | – | 18 |
| Front Master Cylinder | |||
| – Lever Clamp Bolts | – | 80 | 9 |
| – Adapter (1994 – 1995) | 19 | – | 26 |
| Rear Brake Caliper | |||
| – Brake Pan Pin bolts | 13 | – | 18 |
| Rear Master Cylinder Mounting Bolts | – | 88 | 10 |
| Rear Brake Pedal Pivot Bolt | |||
| – 1994 – 2000 | 14 | – | 19 |
| – 2001 | 19 | – | 26 |
