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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Sdi - SDERCW-3 - Shock Lowering Stop Washer - Rear - Lowers 3 mm
SDI
$14.95Sdi - 13140738 - Shock Lowering Stop Washer - Rear - Lowers 3 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsUnitsEachHeight Adjustment...$14.95 -
Out of stock
Sdi - SDESCV125 - Shock Check Valve - M12 x 1.25
SDI
$61.95Sdi - 13140734 - Shock Check Valve - M12 x 1.25FeaturesModifiable pilot holeSpecsRiding StyleOff-RoadUnitsEachProduct NameShock Check ValveFitment2006-2018HondaCRF2502022KawasakiKX 450...$61.95 -
Sdi - SDEHSAS - Adjuster Spring - High Speed - Short
SDI
$33.95Sdi - 13140733 - Adjuster Spring - High Speed - ShortFeaturesGreatly reduces spike feel on square edge bumpsSpecsRiding StyleOff-RoadTypeAdjusterUnitsEachProduct...$33.95 -
Out of stock
Sdi - SDERCW-2 - Shock Lowering Stop Washer - Rear - Lowers 2 mm
SDI
$14.95Sdi - 13140737 - Shock Lowering Stop Washer - Rear - Lowers 2 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsHeight Adjustment ImperialLowers 0...$14.95 -
Out of stock
Sdi - SDESBC85R - Bladder Cap - Red
SDI
$62.95Sdi - 13140708 - Bladder Cap - RedFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsTypeShock...$62.95 -
Sdi - SDESBCH17B - Bladder Cap - Black - Honda
SDI
$59.95Sdi - 13140721 - Bladder Cap - Black - HondaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsProduct...$59.95 -
Sdi - SDM-2222002-O - Linkage Spring Cup - Orange
SDI
$53.95Sdi - 13140796 - Linkage Spring Cup - OrangeFeaturesGreatly increases strengthOEM fitmentAvailable in three different colorsSpecsRiding StyleOff-RoadUnitsEachProduct NameSpring...$53.95 -
Sdi - SDM-2222002-FB - Linkage Spring Cup - Factory Brown
SDI
$53.95Sdi - 13140795 - Linkage Spring Cup - Factory BrownFeaturesGreatly increases strengthOEM fitmentAvailable in three different colorsSpecsProduct NameSpring CupTypeLinkageColor/FinishBrownRiding...$53.95 -
Out of stock
Sdi - SDESBC85BLU - Bladder Cap - Blue
SDI
$62.95Sdi - 13140706 - Bladder Cap - BlueFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsProduct NameCapTypeShock...$62.95 -
Out of stock
Sdi - SDM-2222006-FB - Linkage Shock Bladder Conversion Kit - Factory Brown
SDI
$139.95Sdi - 13140789 - Linkage Shock Bladder Conversion Kit - Factory BrownFeaturesConverts stock OEM floating piston to a conventional bladder system found on other bikesGreatly reduces friction caused by...$139.95 -
Sdi - SDECLAK16-BLU - Linkage Arm - Blue - Husqvarna/KTM
SDI
$449.95Sdi - 13020707 - Linkage Arm - Blue - Husqvarna/KTMFeaturesReduces deep stroke harshness and hookCan lower seat height up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be...$449.95 -
Sdi - SDECLAY18-BLU - Linkage Arm - Blue - Yamaha - '18-'22 YZ450F
SDI
$449.95Sdi - 13020712 - Linkage Arm - Blue - Yamaha - '18-'22 YZ450FFeaturesReduces deep stroke harshness and hookCan lower seat height up to 5-10 mm on some bikesImproves chassis balancePrecision machined...$449.95 -
Out of stock
Sdi - SDM-2222001-FB - Linkage Spring Nut - Factory Brown
SDI
$69.95Sdi - 13140792 - Linkage Spring Nut - Factory BrownFeaturesReduces stress on the shock body, preventing internal wearOEM fitmentAvailable in three different colorsSpecsRiding...$69.95 -
Out of stock
Sdi - SDM-2222006-O - Linkage Shock Bladder Conversion Kit - Orange
SDI
$143.95Sdi - 13140790 - Linkage Shock Bladder Conversion Kit - OrangeFeaturesConverts stock OEM floating piston to a conventional bladder system found on other bikesGreatly reduces friction caused by the...$143.95 -
Out of stock
Sdi - SDM-2222001-B - Linkage Spring Nut - Black
SDI
$74.95Sdi - 13140791 - Linkage Spring Nut - BlackFeaturesReduces stress on the shock body, preventing internal wearOEM fitmentAvailable in three different colorsSpecsProduct NameSpring...$74.95 -
Sdi - SDM-2222006-BLU - Linkage Shock Bladder Conversion Kit - Blue
SDI
$143.95Sdi - 13140788 - Linkage Shock Bladder Conversion Kit - BlueFeaturesConverts stock OEM floating piston to a conventional bladder system found on other bikesGreatly reduces friction caused by the...$143.95 -
Sdi - SDESCV150 - Shock Check Valve - M12 x 1.50
SDI
$61.95Sdi - 13140735 - Shock Check Valve - M12 x 1.50FeaturesModifiable pilot holeSpecsUnitsEachRiding StyleOff-RoadProduct NameShock Check...$61.95 -
Sdi - SRBLH17 - Showa Fork Bladder - Honda
SDI
$20.95Sdi - 13140752 - Showa Fork Bladder - HondaFeaturesSpecsRiding StyleOff-RoadTypeForkProduct NameBladderUnitsEachFitment2018HondaCRF250$20.95 -
Out of stock
Sdi - SDERWK16-9 - Shock Lowering Stop Washer - Rear - Lowers 9 mm
SDI
$26.95Sdi - 13140742 - Shock Lowering Stop Washer - Rear - Lowers 9 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsHeight Adjustment ImperialLowers 0...$26.95 -
Sdi - DRAVASS-HR - Schrader Valve Assembly - Heat Resistance
SDI
$9.95Sdi - 13140746 - Schrader Valve Assembly - Heat ResistanceFeaturesSpecsProduct NameValve AssemblyRiding StyleOff-RoadTypeSchraderTypeHeat ResistantUnitsKit$9.95 -
Sdi - SDERLWK16-2 - Shock Lowering Stop Washer - Rear - Lowers 2 mm
SDI
$24.95Sdi - 13140740 - Shock Lowering Stop Washer - Rear - Lowers 2 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsMounting PositionRearProduct...$24.95 -
Out of stock
Sdi - DRAVASS-SHOWA - Schrader Valve Assembly - Long Brass Air (For Showa forks)
SDI
$9.95Sdi - 13140747 - Schrader Valve Assembly - Long Brass Air (For Showa forks)FeaturesSpecsProduct NameValve AssemblyRiding StyleOff-RoadTypeSchraderTypeFor Showa ForksUnitsKitFitment2015-2016,...$9.95 -
Sdi - SDERLWK16-1 - Shock Lowering Stop Washer - Rear - Lowers 1 mm
SDI
$24.95Sdi - 13140739 - Shock Lowering Stop Washer - Rear - Lowers 1 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsHeight Adjustment ImperialLowers 0...$24.95 -
Out of stock
Sdi - SDERCW-1 - Shock Lowering Stop Washer - Rear - Lowers 1 mm
SDI
$14.95Sdi - 13140736 - Shock Lowering Stop Washer - Rear - Lowers 1 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsUnitsEachMounting...$14.95 -
Out of stock
Sdi - SDEHSAL - Adjuster Spring - High Speed - Long
SDI
$33.95Sdi - 13140732 - Adjuster Spring - High Speed - LongFeaturesGreatly reduces spike feel on square edge bumpsSpecsUnitsEachProduct NameSpringTypeAdjusterRiding StyleOff-RoadFitment2006-2014KawasakiKX...$33.95 -
Sdi - SDESBCY18-B - Bladder Cap - Black - Yamaha
SDI
$61.95Sdi - 13140730 - Bladder Cap - Black - YamahaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsTypeBladderProduct...$61.95 -
Out of stock
Sdi - SDESBCK250B - Bladder Cap - Black - Kawasaki
SDI
$62.95Sdi - 13140728 - Bladder Cap - Black - KawasakiFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsTypeBladderProduct...$62.95 -
Sdi - SDESBCY18-BLU - Bladder Cap - Blue - Yamaha
SDI
$62.95Sdi - 13140731 - Bladder Cap - Blue - YamahaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsRiding...$62.95 -
Out of stock
Sdi - SDESBCK250BLU - Bladder Cap - Blue - Kawasaki
SDI
$59.95Sdi - 13140729 - Bladder Cap - Blue - KawasakiFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader...$59.95 -
Out of stock
Sdi - SDESBCK19-S - Bladder Cap - Black - Kawasaki
SDI
$62.95Sdi - 13140726 - Bladder Cap - Black - KawasakiFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader...$62.95 -
Out of stock
Sdi - SDESBCK19-BLU - Bladder Cap - Blue - Kawasaki
SDI
$59.95Sdi - 13140727 - Bladder Cap - Blue - KawasakiFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader...$59.95 -
Sdi - SDESBCH17R - Bladder Cap - Red - Honda
SDI
$59.95Sdi - 13140722 - Bladder Cap - Red - HondaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsColor/FinishRedProduct...$59.95 -
Out of stock
Sdi - SDESBCAKT16SORG - Bladder Cap - Orange - Husqvarna/KTM
SDI
$143.95Sdi - 13140714 - Bladder Cap - Orange - Husqvarna/KTMFeaturesGreatly reduces friction caused by the stock floating pistonIncreases volume, giving the shock a plusher, more linear feelGreatly...$143.95 -
Sdi - SDESBCH09B - Bladder Cap - Black - Honda
SDI
$59.95Sdi - 13140717 - Bladder Cap - Black - HondaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsOutside Diameter...$59.95 -
Out of stock
Sdi - SDESBCAKT17-ORG - Bladder Cap - Orange - KTM
SDI
$143.95Sdi - 13140716 - Bladder Cap - Orange - KTMFeaturesGreatly reduces friction caused by the stock floating pistonIncreases volume, giving the shock a plusher, more linear feelGreatly increases damping...$143.95 -
Sdi - SDESBCAKT17-BLU - Bladder Cap - Blue - KTM
SDI
$143.95Sdi - 13140715 - Bladder Cap - Blue - KTMFeaturesGreatly reduces friction caused by the stock floating pistonIncreases volume, giving the shock a plusher, more linear feelGreatly increases damping...$143.95 -
Sdi - 13120925 - Shock Spring - RZR XP Turbo (WER)/XP1K Four Seater
SDI
$899.95Sdi - 13120925 - Shock Spring - RZR XP Turbo (WER)/XP1K Four SeaterFeaturesGives your RZR a true dual rate setup, utilizing both springsGreatly reduces body roll, nose dive (bucking) and bottoming...$899.95 -
Sdi - 13120924 - Shock Spring - RZR XP Turbo Four Seater
SDI
$949.95Sdi - 13120924 - Shock Spring - RZR XP Turbo Four SeaterFeaturesGives your RZR a true dual rate setup, utilizing both springsGreatly reduces body roll, nose dive (bucking) and bottoming (G-out...$949.95 -
Sdi - 13120923 - Shock Spring - RZR XP1K Four Seater
SDI
$899.95Sdi - 13120923 - Shock Spring - RZR XP1K Four SeaterFeaturesGives your RZR a true dual rate setup, utilizing both springsGreatly reduces body roll, nose dive (bucking) and bottoming (G-out...$899.95 -
Sdi - 13120922 - Shock Spring - RZR XP1K Two Seater
SDI
$899.95Sdi - 13120922 - Shock Spring - RZR XP1K Two SeaterFeaturesGives your RZR a true dual rate setup, utilizing both springsGreatly reduces body roll, nose dive (bucking) and bottoming (G-out...$899.95
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.