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YAMAHA WR450F AFAM 520 A51 YAMAHA YZ, YZF, WR, WRF *SC*

Quick overview
AFAM Self-cleaning front sprockets (+ in the reference) are available for MX and Off-Road use.

They have on each side of the tooth bottom, a groove which evacuates sand and mud from the sprocket, this way dirt does not accumulate between sprocket and chain. This accumulated dirt causes over tension to the chain as a result sprocket and chain wear out very quickly, and may even block your bike. With this mud grooved sprocket you avoid these problems.
Description
AFAM Self-cleaning front sprockets (+ in the reference) are available for MX and Off-Road use.

They have on each side of the tooth bottom, a groove which evacuates sand and mud from the sprocket, this way dirt does not accumulate between sprocket and chain. This accumulated dirt causes over tension to the chain as a result sprocket and chain wear out very quickly, and may even block your bike. With this mud grooved sprocket you avoid these problems.
This product will suit the bikes listed below.
MakeModelYear
YAMAHAWR250F2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022
YAMAHAYZ2501999,2000,2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022
YAMAHAWR450F2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022
YAMAHAYZ250F2001,2002,2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022
YAMAHAYZ450F2003,2004,2005,2006,2007,2008,2009,2010,2011,2012,2013,2014,2015,2016,2017,2018,2019,2020,2021,2022
YAMAHAWR400F1998,1999,2000,2001,2002
YAMAHAWR426F2001,2002
YAMAHAYZ426F2000,2001,2002
YAMAHAYZ400F1998,1999