You can fine-tune the tension of your primary chain as you need to avoid excessive drag and power loss, ensuring smooth operation and unparalleled riding experience. Allows correct manual adjustment of the primary chain to the factory specifications. Aluminum for superior strength and hardness. Extend primary chain life, and get the most power from the motor. Requires removal of the primary cover for installation or adjustment. Manual Primary Chain Tensioner Directly replaces the factory auto adjuster in order to allow manual adjustment. After accumulating a certain mileage, the primary automatic chain tensioner wears out, so that the main chain cannot be in the proper tension at all times. Over-tight or overly loose primary chains can cause premature failure of the , and replacing the manual tensioner can solve this problem. Condition:Aftermarket Type:Manual Primary Chain Tensioner Finish:Anodized Installation:Easy to install, not included instructions. Fitment: For Road FLHR 1FBC 2017-2021 for Road POLICE FLHP 1FHC 2017-2020 For Road CLASSIC FLHRC 1FRC 2017-2019 For Tri Glide ULTRA FLHTCUTG 1MAD 2017-2018 For Tri Glide ULTRA FLHTCUTG 1MAF 2019-2021 For Ultra Limited LOW FLHTKL 1KKD 2017-2019 For CVO Limited FLHTKSE 1TEF 2017 For Ultra Limited FLHTKSE 1TEH CVO 2018-2021 For Glide STANDARD POLICE FLHTP 1FMC 2017-2020 For Glide FLHTP 1FMP POLICE 2021 For Street Glide FLHX 1KBC 2017-2021 For Street Glide FLHXSE 1PXF CVO 2017 For Street Glide FLHXSE 1PXL CVO 2018-2021 For Freewheeler FLRT 1MCC 2017 Colour:Black & Silver Plated Material:Plastic+Aluminum Alloy Package Conten: 1 * Manual Primary Chain Tensioner 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.