CNC machined for precision and tight tolerances. Heat treated for ultimate combination of hardness and abrasion resistance. Rear Sprockets are made of heat treated 7075-T6 aluminum. Self cleaning mud grooves to prevent dirt build up. Lightweight computer aided design for increased performance.
| Model | Year |
OEM Gearing |
Countershaft |
Rear |
| Yamaha | ||||
| YZ85 | 2002 |
48-14 |
13T- 799070 |
52T - 799255 |
| YZ85 | 03-09 |
47-14 |
14T - 799071 |
53T - 799256 |
54T - 799257 |
||||
| YZ125 | 99-01 |
48-13 |
12T - 799075 |
47T - 799260 |
| YZ125 | 02-04 |
49-13 |
13T - 799076 |
48T - 799261 |
14T - 799077 |
49T - 799262 |
|||
50T - 799263 |
||||
51T - 799264 |
||||
52T - 799265 |
||||
| YZ125 | 05-09 |
48-13 |
12T - 799085 |
47T - 799260 |
13T - 799086 |
48T - 799261 |
|||
49T - 799262 |
||||
50T - 799263 |
||||
51T - 799264 |
||||
52T - 799265 |
||||
| YZ250 | 99-01 |
50-14 |
12T - 799080 |
47T - 799260 |
| YZ250 | 02-04 |
49-14 |
13T - 799081 |
48T - 799261 |
| YZ250 | 05-09 |
50-14 |
15T - 799082 |
49T - 799262 |
50T - 799263 |
||||
51T - 799264 |
||||
52T - 799265 |
||||
| YZ250F | 01-04 |
48-13 |
12T - 799085 |
47T - 799260 |
| YZ250F | 05-09 |
49-13 |
13T - 799086 |
48T - 799261 |
| WR250F | 01-07 |
52-13 |
49T - 799262 |
|
50T - 799263 |
||||
51T - 799264 |
||||
52T - 799265 |
||||
| YZ400F | 1999 |
49-14 |
12T - 799080 |
47T - 799260 |
| YZ426F | 00-02 |
48-14 |
13T - 799081 |
48T - 799261 |
| YZ450F | 03-04 |
48-14 |
15T - 799082 |
49T - 799262 |
| YZ450F | 2005 |
51-14 |
50T - 799263 |
|
| YZ450F | 06-09 |
49-13 |
51T - 799264 |
|
| WR400F | 99-01 |
50-14 |
52T - 799265 |
|
| WR426F | 00-02 |
50-14 |
||
| WR450F | 03-07 |
50-14 |
||
Revised 2/21/09-112