- Forged from lightweight aerospace-grade aluminum alloy; CNC machining ensures each clutch basket is identical to the next
- Weight-saving relief cuts on outside of clutch reduce rotational mass, allowing engine to rev quicker
- Large oiling holes increase lubrication and reduce heat buildup
- PTFE coating makes for a near-frictionless surface
- Come with fasteners complete with pre-applied thread locker
- With kickstarter gear.
Fit the models:
| YAMAHA |
WR 250 |
1993 |
| YAMAHA |
WR 250 |
1994 |
| YAMAHA |
WR 250 |
1996 |
| YAMAHA |
WR 250 |
1995 |
| YAMAHA |
WR 250 |
1997 |
| YAMAHA |
WR 250 Z |
1993 |
| YAMAHA |
WR 250 Z |
1994 |
| YAMAHA |
WR 250 Z |
1996 |
| YAMAHA |
WR 250 Z |
1997 |
| YAMAHA |
WR 250 Z |
1995 |
| YAMAHA |
WR 250 Z |
1998 |
| YAMAHA |
YZ 250 |
2006 |
| YAMAHA |
YZ 250 |
2007 |
| YAMAHA |
YZ 250 |
2008 |
| YAMAHA |
YZ 250 |
2010 |
| YAMAHA |
YZ 250 |
2009 |
| YAMAHA |
YZ 250 |
2011 |
| YAMAHA |
YZ 250 |
2012 |
| YAMAHA |
YZ 250 |
2013 |
| YAMAHA |
YZ 250 |
2014 |
| YAMAHA |
YZ 250 |
2005 |
| YAMAHA |
YZ 250 |
1993 |
| YAMAHA |
YZ 250 |
1994 |
| YAMAHA |
YZ 250 |
1995 |
| YAMAHA |
YZ 250 |
1996 |
| YAMAHA |
YZ 250 |
1997 |
| YAMAHA |
YZ 250 |
1999 |
| YAMAHA |
YZ 250 |
1998 |
| YAMAHA |
YZ 250 |
2000 |
| YAMAHA |
YZ 250 |
2001 |
| YAMAHA |
YZ 250 |
2002 |
| YAMAHA |
YZ 250 |
2003 |
| YAMAHA |
YZ 250 |
2004 |
| YAMAHA |
YZ 250 F |
2010 |
| YAMAHA |
YZ 250 F |
2001 |
| YAMAHA |
YZ 250 F |
2002 |
| YAMAHA |
YZ 250 F |
2003 |
| YAMAHA |
YZ 250 F |
2006 |
| YAMAHA |
YZ 250 F |
2004 |
| YAMAHA |
YZ 250 F |
2005 |
| YAMAHA |
YZ 250 F |
2009 |
| YAMAHA |
YZ 250 F |
2007 |
| YAMAHA |
YZ 250 F |
2008 |

Since 1940, Wiseco has manufactured forged pistons of outstanding quality for motorcycles, motocross bikes, snowmobiles, and 4-wheeler's. After almost 70 years in the industry, Wiseco has become synonymous with high-quality products that exceed the customer's requirements.
| Brand |
Model |
Year |
Name |
CC |
| YAMAHA |
WR |
1993 |
|
250 |
| YAMAHA |
WR |
1994 |
|
250 |
| YAMAHA |
WR |
1995 |
|
250 |
| YAMAHA |
WR |
1996 |
|
250 |
| YAMAHA |
WR |
1997 |
|
250 |
| YAMAHA |
YZ |
1993 |
|
250 |
| YAMAHA |
YZ |
1994 |
|
250 |
| YAMAHA |
YZ |
1995 |
|
250 |
| YAMAHA |
YZ |
1996 |
|
250 |
| YAMAHA |
YZ |
1997 |
|
250 |
| YAMAHA |
YZ |
1998 |
|
250 |
| YAMAHA |
YZ |
1999 |
|
250 |
| YAMAHA |
YZ |
2000 |
|
250 |
| YAMAHA |
YZ |
2001 |
|
250 |
| YAMAHA |
YZ |
2001 |
|
250 |
| YAMAHA |
YZ |
2002 |
|
250 |
| YAMAHA |
YZ |
2003 |
|
250 |
| YAMAHA |
YZ |
2002 |
|
250 |
| YAMAHA |
YZ |
2003 |
|
250 |
| YAMAHA |
YZ |
2004 |
|
250 |
| YAMAHA |
YZ |
2004 |
|
250 |
| YAMAHA |
YZ |
2005 |
|
250 |
| YAMAHA |
YZ |
2005 |
|
250 |
| YAMAHA |
YZ |
2006 |
|
250 |
| YAMAHA |
YZ |
2006 |
|
250 |
| YAMAHA |
YZ |
2007 |
|
250 |
| YAMAHA |
YZ |
2007 |
|
250 |
| YAMAHA |
YZ |
2008 |
|
250 |
| YAMAHA |
YZ |
2008 |
|
250 |
| YAMAHA |
YZ |
2009 |
|
250 |
| YAMAHA |
YZ |
2010 |
|
250 |
| YAMAHA |
YZ |
2009 |
|
250 |
| YAMAHA |
YZ |
2010 |
|
250 |
| YAMAHA |
YZ |
2006 |
50th Anniversary Limited Edition |
250 |
| YAMAHA |
YZ |
2011 |
|
250 |
| YAMAHA |
YZ |
2011 |
|
250 |
| YAMAHA |
WR |
1993 |
|
250 |
| YAMAHA |
WR |
1994 |
|
250 |
| YAMAHA |
WR |
1995 |
|
250 |
| YAMAHA |
WR |
1996 |
|
250 |
| YAMAHA |
WR |
1997 |
|
250 |
| YAMAHA |
WR |
1997 |
|
250 |
| YAMAHA |
WR |
1997 |
|
250 |
| YAMAHA |
YZ |
2011 |
|
250 |
| YAMAHA |
WR |
1998 |
|
250 |
| YAMAHA |
YZ |
2012 |
|
250 |
| YAMAHA |
YZ |
2012 |
|
250 |
| YAMAHA |
YZ |
2012 |
|
250 |
| YAMAHA |
YZ |
2006 |
|
250 |
| YAMAHA |
YZ |
2009 |
|
250 |
| YAMAHA |
YZ |
2010 |
|
250 |
| YAMAHA |
YZ |
2011 |
|
250 |
| YAMAHA |
YZ |
2007 |
|
250 |
| YAMAHA |
YZ |
2008 |
|
250 |
| YAMAHA |
YZ |
2013 |
|
250 |
| YAMAHA |
YZ |
1993 |
|
250 |
| YAMAHA |
YZ |
1994 |
|
250 |
| YAMAHA |
YZ |
1995 |
|
250 |
| YAMAHA |
YZ |
1996 |
|
250 |
| YAMAHA |
YZ |
1997 |
|
250 |
| YAMAHA |
YZ |
1998 |
|
250 |
| YAMAHA |
YZ |
1999 |
|
250 |
| YAMAHA |
YZ |
2000 |
|
250 |
| YAMAHA |
YZ |
2001 |
|
250 |
| YAMAHA |
YZ |
2002 |
|
250 |
| YAMAHA |
YZ |
2003 |
|
250 |
| YAMAHA |
YZ |
2004 |
|
250 |
| YAMAHA |
YZ |
2005 |
|
250 |
| YAMAHA |
YZ |
2006 |
50th Anniversary Limited Edition |
250 |
| YAMAHA |
YZ |
2001 |
|
250 |
| YAMAHA |
YZ |
2002 |
|
250 |
| YAMAHA |
YZ |
2003 |
|
250 |
| YAMAHA |
YZ |
2004 |
|
250 |
| YAMAHA |
YZ |
2005 |
|
250 |
| YAMAHA |
YZ |
2006 |
|
250 |
| YAMAHA |
YZ |
2007 |
|
250 |
| YAMAHA |
YZ |
2008 |
|
250 |
| YAMAHA |
YZ |
2009 |
|
250 |
| YAMAHA |
YZ |
2010 |
|
250 |
| YAMAHA |
YZ |
2012 |
|
250 |
| YAMAHA |
YZ |
2013 |
|
250 |
| YAMAHA |
YZ |
2013 |
|
250 |
| YAMAHA |
YZ |
2013 |
|
250 |
| YAMAHA |
YZ |
2014 |
|
250 |
| YAMAHA |
YZ |
2014 |
|
250 |
| YAMAHA |
YZ |
2014 |
|
250 |
| YAMAHA |
YZ |
2014 |
|
250 |
| YAMAHA |
WR |
1993 |
|
250 |
| YAMAHA |
WR |
1994 |
|
250 |
| YAMAHA |
WR |
1995 |
|
250 |
| YAMAHA |
WR |
1996 |
|
250 |
| YAMAHA |
WR |
1997 |
|
250 |