Top End & Piston 41.21/+1.25 11:1 Yamaha PW 50 1990-2021

Will Not Accept Oem Rings And Rings Will Not Work On Oem Piston
Top End Kit 41.21/+1.25 11:1 Yam Mpn: Nx-40005-5k
Fitment Yamaha Pw 50 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021