It helps to dissipate excess voltage, improve the charging capacity, and prevent the battery from overcharging. If the motorcycle engine does not go through the rectifier, the voltage fluctuate greatly as the engine speed decreases. It is easy to damage electrical appliances. If the rectifier is broken, the battery cannot be naturally. The rectifier is , some have no voltage output (mostly), and some have an extremely high output voltage! Compatible models: For 54040301B For 1200R 2016-2017 For 899 Panigale 2014-2015 For 959 Panigale 2016 For 959 Panigale Corse 2018 For 959 Panigale ABS 2017-2018 For 1199 Panigale 2012-2014 For 1199 Panigale R 2014-2016 For 1199 Panigale S 2012-2014 For 1299 Panigale 2015-2016 For 1299 Panigale S 2015-2016 For 1299 Panigale S ABS 2017 For 1299 Panigale Final Edition 2018 For XDiavel 2016-2019 For XDiavel S 2016-2019 For Diavel 2014-2017 For Diavel Strada 2013 For Diavel Carbon 2013-2017 For Diavel FL 2017 For Diavel Carbon FL 2017 For Diavel FL 1200 2018 For Diavel Carbon FL 1200 2018 For Diavel 1200 2017 Color: As Shown Material: ABS+Metal Package Contents: 1 x Motorcycle Rectifier Voltage Regulator Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.