- Removes excess slack in the timing chain to prevent damage to the pistons and valves
KTM -- 250 EXC-F -- (2017, 2018, 2019); KTM -- 250 SX-F -- (2007, 2013, 2020, 2016, 2021, 2011, 2005, 2010, 2017, 2019, 2012, 2014, 2015, 2008, 2009, 2006, 2018); KTM -- 350 SX-F -- (2012, 2015, 2016, 2011, 2018, 2020, 2013, 2014, 2017, 2021, 2019); KTM -- 450 SX-F -- (2018, 2009, 2011, 2008, 2010, 2014, 2020, 2021, 2007, 2016, 2019, 2013, 2015, 2012, 2017); KTM -- 450 SX-F FE -- (2012, 2015, 2016, 2013, 2020, 2018); KTM -- 350 EXC-F -- (2014, 2020, 2013, 2018, 2019, 2015, 2021, 2012, 2016, 2017); KTM -- 450 EXC-F Six Days -- (2017, 2018, 2019); KTM -- 250 SX-F FE -- (2015, 2016); KTM -- 500 EXC-F -- (2021, 2018, 2020, 2017, 2019)