This full suspension linkage is designed to improve comfort on acceleration chop and braking bumps with a more linear dampening curve. To control bottoming it must be used in conjunction with a one rate stiffer shock spring. For example if your recommended spring is 45NM ( 4.6KGM) you use a 48NM (4.9KGM). NOTE: Will work on 2021 Husqvarna models raising the rear to the same height as the Rockstar Edition. Recommended sag with the Rideng full linkage system is 104-106mm.