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SDI

SDI

SDI specializes in high-performance suspension components and tuning parts for motorcycles, ATVs, UTVs and motocross applications. The brand is known for precision-engineered fork service kits, lowering pull rods and suspension linkage systems designed to improve handling and ride control. Its product range supports key categories like motorcycle suspension tuning, fork rebuild kits and off-road suspension upgrades for Yamaha, KTM, Honda and other major platforms.


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  • Qty in Cart
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  • Price
  • Subtotal
  • Sdi - DRPBK-KYB40 - DU Piston Bushing Conversion Kit - 40 mm Sdi - DRPBK-KYB40 - DU Piston Bushing Conversion Kit - 40 mm

    Sdi - DRPBK-KYB40 - DU Piston Bushing Conversion Kit - 40 mm

    SDI

    $19.95
    Sdi - 04500623 - DU Piston Bushing Conversion Kit - 40 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsTypePistonUnitsKitRiding StyleOff-RoadFork Tube...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Sdi - KFSK46 - Fork Service Kit - 46 mm Sdi - KFSK46 - Fork Service Kit - 46 mm

    Sdi - KFSK46 - Fork Service Kit - 46 mm

    SDI

    $79.95
    Sdi - 04500626 - Fork Service Kit - 46 mmFeaturesSpecsProduct NameService KitRiding StyleOff-RoadTypeForkUnitsEachFork Tube Diameter Imperial1...
    $79.95
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • Sdi - SDETCVY18-SET - Spring Perch Set - YZ250F/450F Sdi - SDETCVY18-SET - Spring Perch Set - YZ250F/450F

    Sdi - SDETCVY18-SET - Spring Perch Set - YZ250F/450F

    SDI

    $110.95
    Sdi - 04500613 - Spring Perch Set - YZ250F/450FFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U.S...
    $110.95
    Qty in Cart: 0
    Quantity:
    Price:
    $110.95
    Subtotal:
  • Sdi - DRPBK-WP36 - DU Piston Bushing Conversion Kit - 36 mm Sdi - DRPBK-WP36 - DU Piston Bushing Conversion Kit - 36 mm

    Sdi - DRPBK-WP36 - DU Piston Bushing Conversion Kit - 36 mm

    SDI

    $19.95
    Sdi - 04500618 - DU Piston Bushing Conversion Kit - 36 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsTypePistonRiding StyleOff-RoadUnitsKitFork Tube...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Out of stock
    Sdi - DRPBK-SH50 - DU Piston Bushing Conversion Kit - 50 mm Sdi - DRPBK-SH50 - DU Piston Bushing Conversion Kit - 50 mm

    Sdi - DRPBK-SH50 - DU Piston Bushing Conversion Kit - 50 mm

    SDI

    $19.95
    Sdi - 04500617 - DU Piston Bushing Conversion Kit - 50 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsTypePistonFork Tube Diameter Imperial1...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Sdi - SDETCVWP - Spring Perch Set - KTM/Husqvarna Sdi - SDETCVWP - Spring Perch Set - KTM/Husqvarna

    Sdi - SDETCVWP - Spring Perch Set - KTM/Husqvarna

    SDI

    $104.95
    Sdi - 04500611 - Spring Perch Set - KTM/HusqvarnaFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U...
    $104.95
    Qty in Cart: 0
    Quantity:
    Price:
    $104.95
    Subtotal:
  • Sdi - DRPBK-KTB50 - DU Piston Bushing Conversion Kit - 50 mm Sdi - DRPBK-KTB50 - DU Piston Bushing Conversion Kit - 50 mm

    Sdi - DRPBK-KTB50 - DU Piston Bushing Conversion Kit - 50 mm

    SDI

    $19.95
    Sdi - 04500615 - DU Piston Bushing Conversion Kit - 50 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsUnitsKitFork Tube Diameter Imperial1...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Out of stock
    Sdi - SDETCV24-MX-SET - Spring Perch Set - YZ250F/450F Sdi - SDETCV24-MX-SET - Spring Perch Set - YZ250F/450F

    Sdi - SDETCV24-MX-SET - Spring Perch Set - YZ250F/450F

    SDI

    $104.95
    Sdi - 04500608 - Spring Perch Set - YZ250F/450FFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U.S...
    $104.95
    Qty in Cart: 0
    Quantity:
    Price:
    $104.95
    Subtotal:
  • Sdi - SDEFSP25-10 - Fork Preload Spacer - 10 mm Sdi - SDEFSP25-10 - Fork Preload Spacer - 10 mm

    Sdi - SDEFSP25-10 - Fork Preload Spacer - 10 mm

    SDI

    $6.95
    Sdi - 04500605 - Fork Preload Spacer - 10 mmFeaturesMade in the U.S.ASpecsRiding StyleOff-RoadTypeForkProduct NameSpacerFork Tube Diameter Metric10.00...
    $6.95
    Qty in Cart: 0
    Quantity:
    Price:
    $6.95
    Subtotal:
  • Out of stock
    Sdi - SDEFSP25-25 - Fork Preload Spacer - 2.5 mm Sdi - SDEFSP25-25 - Fork Preload Spacer - 2.5 mm

    Sdi - SDEFSP25-25 - Fork Preload Spacer - 2.5 mm

    SDI

    $6.95
    Sdi - 04500606 - Fork Preload Spacer - 2.5 mmFeaturesMade in the U.S.ASpecsRiding StyleOff-RoadTypeForkUnitsPairFork Tube Diameter Metric2.50 mmProduct...
    $6.95
    Qty in Cart: 0
    Quantity:
    Price:
    $6.95
    Subtotal:
  • Out of stock
    Sdi - WFSK48 - Fork Service Kit - 48 mm Sdi - WFSK48 - Fork Service Kit - 48 mm

    Sdi - WFSK48 - Fork Service Kit - 48 mm

    SDI

    MSRP: $139.95
    $133.95
    Sdi - 04500636 - Fork Service Kit - 48 mmFeaturesSpecsRiding StyleOff-RoadTypeForkRiding StyleStreetUnitsEachFork Tube Diameter Imperial1.89''Product NameService...
    MSRP: $139.95
    $133.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $139.95
    $133.95
    Subtotal:
  • Out of stock
    Sdi - SDEFSP10 - Fork Preload Spacer - 10 mm Sdi - SDEFSP10 - Fork Preload Spacer - 10 mm

    Sdi - SDEFSP10 - Fork Preload Spacer - 10 mm

    SDI

    $5.95
    Sdi - 04500602 - Fork Preload Spacer - 10 mmFeaturesMade in the U.S.ASpecsFork Tube Diameter Metric10.00 mmProduct NameSpacerRiding...
    $5.95
    Qty in Cart: 0
    Quantity:
    Price:
    $5.95
    Subtotal:
  • Sdi - SFSK47 - Fork Service Kit - 47 mm Sdi - SFSK47 - Fork Service Kit - 47 mm

    Sdi - SFSK47 - Fork Service Kit - 47 mm

    SDI

    $74.95
    Sdi - 04500629 - Fork Service Kit - 47 mmFeaturesSpecsProduct NameService KitUnitsEachFork Tube Diameter Imperial1.85''Riding...
    $74.95
    Qty in Cart: 0
    Quantity:
    Price:
    $74.95
    Subtotal:
  • Sdi - SFSK37 - Fork Service Kit - 37 mm Sdi - SFSK37 - Fork Service Kit - 37 mm

    Sdi - SFSK37 - Fork Service Kit - 37 mm

    SDI

    $74.95
    Sdi - 04500628 - Fork Service Kit - 37 mmFeaturesSpecsUnitsEachProduct NameService KitRiding StyleOff-RoadTypeForkFork Tube Diameter Imperial1...
    $74.95
    Qty in Cart: 0
    Quantity:
    Price:
    $74.95
    Subtotal:
  • Sdi - SDEFFPA-TAC - Free Piston Assembly - 49 mm Sdi - SDEFFPA-TAC - Free Piston Assembly - 49 mm

    Sdi - SDEFFPA-TAC - Free Piston Assembly - 49 mm

    SDI

    $59.95
    Sdi - 04500597 - Free Piston Assembly - 49 mmFeaturesImproved designComes assembled with all necessary bushings, o-rings and sealsCompletely rebuildable for serviceMade in the...
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • Sdi - DRPBK-SH40 - DU Piston Bushing Conversion Kit - 40 mm Sdi - DRPBK-SH40 - DU Piston Bushing Conversion Kit - 40 mm

    Sdi - DRPBK-SH40 - DU Piston Bushing Conversion Kit - 40 mm

    SDI

    $19.95
    Sdi - 04500616 - DU Piston Bushing Conversion Kit - 40 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsFork Tube Diameter Imperial1.58''Product...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Sdi - SDETCV18-MXSET - Spring Perch Set - YZ250F/450F Sdi - SDETCV18-MXSET - Spring Perch Set - YZ250F/450F

    Sdi - SDETCV18-MXSET - Spring Perch Set - YZ250F/450F

    SDI

    $110.95
    Sdi - 04500612 - Spring Perch Set - YZ250F/450FFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U.S...
    $110.95
    Qty in Cart: 0
    Quantity:
    Price:
    $110.95
    Subtotal:
  • Sdi - KSFK48 - Fork Service Kit - 48 mm Sdi - KSFK48 - Fork Service Kit - 48 mm

    Sdi - KSFK48 - Fork Service Kit - 48 mm

    SDI

    $89.95
    Sdi - 04500627 - Fork Service Kit - 48 mmFeaturesSpecsRiding StyleOff-RoadTypeForkProduct NameService KitUnitsEachFork Tube Diameter Imperial1...
    $89.95
    Qty in Cart: 0
    Quantity:
    Price:
    $89.95
    Subtotal:
  • Out of stock
    Sdi - SDETCV24-SET - Spring Perch Set Sdi - SDETCV24-SET - Spring Perch Set

    Sdi - SDETCV24-SET - Spring Perch Set

    SDI

    $104.95
    Sdi - 04500609 - Spring Perch SetFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U.S...
    $104.95
    Qty in Cart: 0
    Quantity:
    Price:
    $104.95
    Subtotal:
  • Out of stock
    Sdi - WFSK35-SKF - Fork Service Kit - 35 mm Sdi - WFSK35-SKF - Fork Service Kit - 35 mm

    Sdi - WFSK35-SKF - Fork Service Kit - 35 mm

    SDI

    $99.95
    Sdi - 04500633 - Fork Service Kit - 35 mmFeaturesSpecsFork Tube Diameter Imperial1.38''Riding StyleOff-RoadTypeForkUnitsEachProduct NameService...
    $99.95
    Qty in Cart: 0
    Quantity:
    Price:
    $99.95
    Subtotal:
  • Sdi - SDEFFPA09-SET - Free Piston Assembly - 48 mm Sdi - SDEFFPA09-SET - Free Piston Assembly - 48 mm

    Sdi - SDEFFPA09-SET - Free Piston Assembly - 48 mm

    SDI

    $110.95
    Sdi - 04500600 - Free Piston Assembly - 48 mmFeaturesImproved designComes assembled with all necessary bushings, o-rings and sealsCompletely rebuildable for serviceMade in the USASpecsFork Tube...
    $110.95
    Qty in Cart: 0
    Quantity:
    Price:
    $110.95
    Subtotal:
  • Out of stock
    Sdi - SFSK49 - Fork Service Kit - 49 mm Sdi - SFSK49 - Fork Service Kit - 49 mm

    Sdi - SFSK49 - Fork Service Kit - 49 mm

    SDI

    $83.95
    Sdi - 04500631 - Fork Service Kit - 49 mmFeaturesSpecsFork Tube Diameter Imperial1.93''UnitsEachProduct NameService KitRiding StyleOff-RoadTypeForkFitment2015-2016,...
    $83.95
    Qty in Cart: 0
    Quantity:
    Price:
    $83.95
    Subtotal:
  • Sdi - DRPBK-WP5016 - DU Piston Bushing Conversion Kit - 50 mm Sdi - DRPBK-WP5016 - DU Piston Bushing Conversion Kit - 50 mm

    Sdi - DRPBK-WP5016 - DU Piston Bushing Conversion Kit - 50 mm

    SDI

    $19.95
    Sdi - 04500621 - DU Piston Bushing Conversion Kit - 50 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsFork Tube Diameter Imperial1.97''UnitsKitRiding...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Out of stock
    Sdi - DRPBK-KYB46 - DU Piston Bushing Conversion Kit - 46 mm Sdi - DRPBK-KYB46 - DU Piston Bushing Conversion Kit - 46 mm

    Sdi - DRPBK-KYB46 - DU Piston Bushing Conversion Kit - 46 mm

    SDI

    $19.95
    Sdi - 04500614 - DU Piston Bushing Conversion Kit - 46 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsTypePistonRiding StyleOff-RoadUnitsKitProduct...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Out of stock
    Sdi - DRPBK-WP46XPL - DU Piston Bushing Conversion Kit - 46 mm Sdi - DRPBK-WP46XPL - DU Piston Bushing Conversion Kit - 46 mm

    Sdi - DRPBK-WP46XPL - DU Piston Bushing Conversion Kit - 46 mm

    SDI

    $19.95
    Sdi - 04500619 - DU Piston Bushing Conversion Kit - 46 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsFork Tube Diameter Imperial1.81''UnitsKitRiding...
    $19.95
    Qty in Cart: 0
    Quantity:
    Price:
    $19.95
    Subtotal:
  • Sdi - SDETCV25-SET - Spring Perch Set Sdi - SDETCV25-SET - Spring Perch Set

    Sdi - SDETCV25-SET - Spring Perch Set

    SDI

    $110.95
    Sdi - 04500610 - Spring Perch SetFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U.S.ASpecsRiding...
    $110.95
    Qty in Cart: 0
    Quantity:
    Price:
    $110.95
    Subtotal:
  • Sdi - SDEFFPA-TAC-SET - Free Piston Assembly - 49 mm Sdi - SDEFFPA-TAC-SET - Free Piston Assembly - 49 mm

    Sdi - SDEFFPA-TAC-SET - Free Piston Assembly - 49 mm

    SDI

    $110.95
    Sdi - 04500598 - Free Piston Assembly - 49 mmFeaturesImproved designComes assembled with all necessary bushings, o-rings and sealsCompletely rebuildable for serviceMade in the USASpecsUnitsSetRiding...
    $110.95
    Qty in Cart: 0
    Quantity:
    Price:
    $110.95
    Subtotal:
  • Sdi - SDETCV23SET - Spring Perch Set - CRF Sdi - SDETCV23SET - Spring Perch Set - CRF

    Sdi - SDETCV23SET - Spring Perch Set - CRF

    SDI

    $144.95
    Sdi - 04500607 - Spring Perch Set - CRFFeaturesGreatly improves bottoming resistance and deep stroke performanceRequires some modification to suit your needs, comes with guideMade in the U.S...
    $144.95
    Qty in Cart: 0
    Quantity:
    Price:
    $144.95
    Subtotal:
  • Out of stock
    Sdi - SDEFFPA09 - Free Piston Assembly - 48 mm Sdi - SDEFFPA09 - Free Piston Assembly - 48 mm

    Sdi - SDEFFPA09 - Free Piston Assembly - 48 mm

    SDI

    $62.95
    Sdi - 04500599 - Free Piston Assembly - 48 mmFeaturesImproved designComes assembled with all necessary bushings, o-rings and sealsCompletely rebuildable for serviceMade in the USASpecsFork Tube...
    $62.95
    Qty in Cart: 0
    Quantity:
    Price:
    $62.95
    Subtotal:
  • Out of stock
    Sdi - SDESBCAKT11-ORG - Bladder Cap - Orange - Husqvarna/KTM Sdi - SDESBCAKT11-ORG - Bladder Cap - Orange - Husqvarna/KTM

    Sdi - SDESBCAKT11-ORG - Bladder Cap - Orange - Husqvarna/KTM

    SDI

    $143.95
    Sdi - 13140710 - Bladder Cap - Orange - Husqvarna/KTMFeaturesGreatly reduces friction caused by the stock floating pistonIncreases volume, giving the shock a plusher, more linear feelGreatly...
    $143.95
    Qty in Cart: 0
    Quantity:
    Price:
    $143.95
    Subtotal:
  • Out of stock
    Sdi - SDESBC52BLU-S - Bladder Cap - Blue - Kawasaki/Yamaha Sdi - SDESBC52BLU-S - Bladder Cap - Blue - Kawasaki/Yamaha

    Sdi - SDESBC52BLU-S - Bladder Cap - Blue - Kawasaki/Yamaha

    SDI

    $66.95
    Sdi - 13140702 - Bladder Cap - Blue - Kawasaki/YamahaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader...
    $66.95
    Qty in Cart: 0
    Quantity:
    Price:
    $66.95
    Subtotal:
  • Sdi - SDEFSP25-05 - Fork Preload Spacer - 5 mm Sdi - SDEFSP25-05 - Fork Preload Spacer - 5 mm

    Sdi - SDEFSP25-05 - Fork Preload Spacer - 5 mm

    SDI

    $5.95
    Sdi - 04500604 - Fork Preload Spacer - 5 mmFeaturesMade in the U.S.ASpecsProduct NameSpacerRiding StyleOff-RoadTypeForkFork Tube Diameter Metric5.00...
    $5.95
    Qty in Cart: 0
    Quantity:
    Price:
    $5.95
    Subtotal:
  • Out of stock
    Sdi - SDEFFPA-SFF - Free Piston Assembly Sdi - SDEFFPA-SFF - Free Piston Assembly

    Sdi - SDEFFPA-SFF - Free Piston Assembly

    SDI

    $62.95
    Sdi - 04500596 - Free Piston AssemblyFeaturesImproved designComes assembled with all necessary bushings, o-rings and sealsCompletely rebuildable for serviceMade in the USASpecsMaterialAluminumProduct...
    $62.95
    Qty in Cart: 0
    Quantity:
    Price:
    $62.95
    Subtotal:
  • Sdi - SDESBCAKT11-BLU - Bladder Cap - Blue - Husqvarna/KTM Sdi - SDESBCAKT11-BLU - Bladder Cap - Blue - Husqvarna/KTM

    Sdi - SDESBCAKT11-BLU - Bladder Cap - Blue - Husqvarna/KTM

    SDI

    $136.95
    Sdi - 13140709 - Bladder Cap - Blue - Husqvarna/KTMFeaturesGreatly reduces friction caused by the stock floating pistonIncreases volume, giving the shock a plusher, more linear feelGreatly increases...
    $136.95
    Qty in Cart: 0
    Quantity:
    Price:
    $136.95
    Subtotal:
  • Sdi - SDESBC52B-S - Bladder Cap - Black - Kawasaki/Yamaha Sdi - SDESBC52B-S - Bladder Cap - Black - Kawasaki/Yamaha

    Sdi - SDESBC52B-S - Bladder Cap - Black - Kawasaki/Yamaha

    SDI

    $66.95
    Sdi - 13140700 - Bladder Cap - Black - Kawasaki/YamahaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader...
    $66.95
    Qty in Cart: 0
    Quantity:
    Price:
    $66.95
    Subtotal:
  • Sdi - SDECPRKT16-B - Lowering Pull Rod - Black Sdi - SDECPRKT16-B - Lowering Pull Rod - Black

    Sdi - SDECPRKT16-B - Lowering Pull Rod - Black

    SDI

    $219.95
    Sdi - 13041063 - Lowering Pull Rod - BlackFeaturesReduces deep stroke harshness and hookCan lower seat up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be lightweight, but...
    $219.95
    Qty in Cart: 0
    Quantity:
    Price:
    $219.95
    Subtotal:
  • Sdi - SDECPRKX250-B - Lowering Pull Rod - Black Sdi - SDECPRKX250-B - Lowering Pull Rod - Black

    Sdi - SDECPRKX250-B - Lowering Pull Rod - Black

    SDI

    $219.95
    Sdi - 13041064 - Lowering Pull Rod - BlackFeaturesReduces deep stroke harshness and hookCan lower seat up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be lightweight, but...
    $219.95
    Qty in Cart: 0
    Quantity:
    Price:
    $219.95
    Subtotal:
  • Sdi - SDESBCAKT16SBLU - Bladder Cap - Blue - Husqvarna/KTM Sdi - SDESBCAKT16SBLU - Bladder Cap - Blue - Husqvarna/KTM

    Sdi - SDESBCAKT16SBLU - Bladder Cap - Blue - Husqvarna/KTM

    SDI

    $143.95
    Sdi - 13140713 - Bladder Cap - Blue - Husqvarna/KTMFeaturesGreatly reduces friction caused by the stock floating pistonIncreases volume, giving the shock a plusher, more linear feelGreatly increases...
    $143.95
    Qty in Cart: 0
    Quantity:
    Price:
    $143.95
    Subtotal:
  • Total: items /

Adding your products to cart

SDI Suspension Performance Systems – Motorcycle & Powersports Suspension Tuning, Fork Service Kits & Linkage Components

SDI is a performance-focused brand recognized in the powersports industry for its advanced suspension tuning components and precision-machined upgrade parts. The company develops high-quality solutions such as fork service kits, shock components and linkage systems that improve suspension response, stability and rider control across motocross, enduro and UTV applications. With a strong emphasis on durability and engineering accuracy, SDI products are widely used in both professional racing and recreational off-road environments.

 

The SDI product lineup includes a wide range of fork service kits, bladder caps, lowering pull rods, linkage arms and shock rebuild components designed for major OEM platforms like Yamaha YZ series, KTM/Husqvarna, Honda CRF and Polaris RZR models. These products create strong internal-link opportunities across categories such as motorcycle suspension parts, fork rebuild kits, shock tuning components and UTV suspension upgrades. Additional solutions like DU piston bushing conversion kits, spring perch sets and floating piston assemblies further expand its presence in advanced suspension tuning systems.

 

Built for performance and reliability, SDI components are engineered to enhance suspension responsiveness, adjust ride height and optimize handling under demanding riding conditions. Riders benefit from improved traction, better shock absorption and precise suspension tuning for both motocross tracks and off-road terrain. With compatibility across motorcycles, dirt bikes and UTV platforms, SDI continues to be a trusted choice for suspension upgrades, rebuild kits and performance tuning solutions.