Pevnější zuby = vyšší životnost řetězové sady až o 10%. Rozeta 52z, řetěz 520.
| YAMAHA |
250 |
WR 250 F |
2001 |
| YAMAHA |
250 |
WR 250 F |
2002 |
| YAMAHA |
250 |
WR 250 F |
2003 |
| YAMAHA |
250 |
WR 250 F |
2004 |
| YAMAHA |
250 |
WR 250 F |
2005 |
| YAMAHA |
250 |
WR 250 F |
2006 |
| YAMAHA |
250 |
WR 250 F |
2007 |
| YAMAHA |
250 |
WR 250 F |
2008 |
| YAMAHA |
250 |
WR 250 F |
2009 |
| YAMAHA |
250 |
WR 250 F |
2010 |
| YAMAHA |
250 |
WR 250 F |
2011 |
| YAMAHA |
250 |
WR 250 F |
2012 |
| YAMAHA |
250 |
WR 250 F |
2013 |
| YAMAHA |
250 |
WR 250 F |
2014 |
| YAMAHA |
250 |
WR 250 F |
2015 |
| YAMAHA |
250 |
WR 250 F |
2016 |
| YAMAHA |
250 |
WR 250 F |
2017 |
| YAMAHA |
250 |
WR 250 F |
2018 |
| YAMAHA |
250 |
WR 250 F |
2019 |
| YAMAHA |
250 |
WR 250 F |
2020 |
| YAMAHA |
250 |
WR 250 F |
2021 |
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