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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Out of stock
Sdi - SDECPRY18-B - Lowering Pull Rod - Black
SDI
$219.95Sdi - 13041071 - 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 -
Out of stock
Sdi - KFSK43 - Fork Service Kit - 43 mm
SDI
$79.95Sdi - 04500625 - Fork Service Kit - 43 mmFeaturesSpecsFork Tube Diameter Imperial1.69''UnitsEachProduct NameService KitRiding...$79.95 -
Sdi - SDECPRY15-BLU - Lowering Pull Rod - Blue
SDI
$219.95Sdi - 13041072 - Lowering Pull Rod - BlueFeaturesReduces deep stroke harshness and hookCan lower seat up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be lightweight, but...$219.95 -
Out of stock
Sdi - SDECPRY10-BLU - Lowering Pull Rod - Blue
SDI
$219.95Sdi - 13041070 - Lowering Pull Rod - BlueFeaturesReduces deep stroke harshness and hookCan lower seat up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be lightweight, but...$219.95 -
Out of stock
Sdi - SDECLAY18-B - Linkage Arm - Black - Yamaha - '18'-22 YZ450F
SDI
$449.95Sdi - 13020711 - Linkage Arm - Black - 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 -
Sdi - SDESBCH250B - Bladder Cap - Black - Honda
SDI
$59.95Sdi - 13140723 - Bladder Cap - Black - HondaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader...$59.95 -
Sdi - SDESBCH250G - Bladder Cap - Gray - Honda
SDI
$59.95Sdi - 13140724 - Bladder Cap - Gray - 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 - SDESBC52BLU-L - Bladder Cap - Blue - Yamaha
SDI
$62.95Sdi - 13140701 - Bladder Cap - Blue - YamahaFeaturesIncreases volume, giving the shock a more linear feelHelps keep shock coolerUses easy-to-service standard Schrader valveSpecsProduct NameCapRiding...$62.95 -
Out of stock
Sdi - WFSK43-AER - Fork Service Kit - 43 mm
SDI
MSRP: $119.95$114.95Sdi - 04500635 - Fork Service Kit - 43 mmFeaturesSpecsUnitsEachFork Tube Diameter Imperial1.69''Product NameService KitRiding StyleOff-RoadTypeForkFitment2017-2021HusqvarnaTC85 17/142017KTM85 SX...MSRP: $119.95$114.95 -
Sdi - SFSK48 - Fork Service Kit - 48 mm
SDI
$79.95Sdi - 04500630 - Fork Service Kit - 48 mmFeaturesSpecsFork Tube Diameter Imperial1.89''Riding StyleOff-RoadTypeForkProduct NameService...$79.95 -
Sdi - SDM-2222003 - Linkage Knob - High Speed
SDI
$29.95Sdi - 13140797 - Linkage Knob - High SpeedFeaturesEasily change high speed compression accurately with improved ergonomicsSpecsProduct NameLinkage KnobUnitsEachRiding StyleOff-RoadTypeHigh...$29.95 -
Out of stock
Sdi - DRPBK-WP5023 - DU Piston Bushing Conversion Kit - 50 mm
SDI
$19.95Sdi - 04500664 - DU Piston Bushing Conversion Kit - 50 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsUnitsKitProduct NameBushingTypePistonFork Tube...$19.95 -
Sdi - SDECPRY10-B - Lowering Pull Rod - Black
SDI
$219.95Sdi - 13041068 - 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 -
Sdi - SDECPRKX85XL-B - Lowering Pull Rod - Black
SDI
$62.95Sdi - 13041069 - 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...$62.95 -
Sdi - SDECPRKX85SLBLU - Lowering Pull Rod - Blue
SDI
$62.95Sdi - 13041067 - Lowering Pull Rod - BlueFeaturesReduces deep stroke harshness and hookCan lower seat up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be lightweight, but...$62.95 -
Out of stock
Sdi - SDECPRKX85L-BLU - Lowering Pull Rod - Blue
SDI
$62.95Sdi - 13041066 - Lowering Pull Rod - BlueFeaturesReduces deep stroke harshness and hookCan lower seat up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be lightweight, but...$62.95 -
Out of stock
Sdi - SDECPRKX85L-B - Lowering Pull Rod - Black
SDI
$62.95Sdi - 13041065 - 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...$62.95 -
Sdi - SDECPRKT11-B - Lowering Pull Rod - Black
SDI
$219.95Sdi - 13041062 - 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 -
Sdi - SDM-2222002-B - Linkage Spring Cup - Black
SDI
$53.95Sdi - 13140794 - Linkage Spring Cup - BlackFeaturesGreatly increases strengthOEM fitmentAvailable in three different colorsSpecsRiding StyleOff-RoadColor/FinishBlackTypeLinkageProduct NameSpring...$53.95 -
Out of stock
Sdi - SDECLAY10-B - Linkage Arm - Black - Yamaha - '10-'17 YZ450F
SDI
$449.95Sdi - 13020709 - Linkage Arm - Black - Yamaha - '10-'17 YZ450FFeaturesReduces deep stroke harshness and hookCan lower seat height up to 5-10 mm on some bikesImproves chassis balancePrecision machined...$449.95 -
Sdi - SDM-0000008-O - Fork Cap - Adjuster Handle Set - Orange
SDI
$34.95Sdi - 04040669 - Fork Cap - Adjuster Handle Set - OrangeFeaturesReplaces the stock plastic knob with a more durable metal-machined handle that won’t crack over timeMakes it easier to perform...$34.95 -
Sdi - SDM-2222008-B - Fork Cap - Adjuster Handle Set - Black
SDI
$34.95Sdi - 04040668 - Fork Cap - Adjuster Handle Set - BlackFeaturesReplaces the stock plastic knob with a more durable metal-machined handle that won’t crack over timeMakes it easier to perform...$34.95 -
Sdi - SRBLH105 - Showa Fork Bladder - 61" - Honda
SDI
$21.95Sdi - 13140751 - Showa Fork Bladder - 61" - HondaFeaturesSpecsProduct NameBladderLength Metric61.00 mmOutside Diameter Imperial2.40''Inside Diameter Imperial1.97''Riding...$21.95 -
Sdi - SRBLH05 - Showa Fork Bladder - 105" - Honda
SDI
$24.95Sdi - 13140750 - Showa Fork Bladder - 105" - HondaFeaturesSpecsLength Metric105.00 mmOutside Diameter Imperial1.97''Product NameBladderLength Imperial4.13''Inside Diameter Imperial1.57''Riding...$24.95 -
Out of stock
Sdi - SDECLAK16-ORG - Linkage Arm - Orange - Husqvarna/KTM
SDI
$472.95Sdi - 13020708 - Linkage Arm - Orange - Husqvarna/KTMFeaturesReduces deep stroke harshness and hookCan lower seat height up to 5-10 mm on some bikesImproves chassis balancePrecision machined to be...$472.95 -
Sdi - DRAVAAA-WPD - Schrader Valve Assembly - Long Brass Air (For WP forks)
SDI
$9.95Sdi - 13140749 - Schrader Valve Assembly - Long Brass Air (For WP forks)FeaturesSpecsRiding StyleOff-RoadTypeSchraderTypeFor WP ForksUnitsKitProduct NameValve...$9.95 -
Sdi - SDM-2222001-O - Linkage Spring Nut - Orange
SDI
$69.95Sdi - 13140793 - Linkage Spring Nut - OrangeFeaturesReduces stress on the shock body, preventing internal wearOEM fitmentAvailable in three different colorsSpecsProduct NameSpring...$69.95 -
Sdi - WRFPOR50-16 - Floating Piston - O-Ring - 50 mm
SDI
$6.95Sdi - 13140760 - Floating Piston - O-Ring - 50 mmFeaturesSpecsUnitsEachProduct NameO-RingTypeFloatingOutside Diameter Imperial1.97''Riding...$6.95 -
Sdi - WRFPOR48-PDS - Floating Piston - O-Ring - 48 mm
SDI
$1.95Sdi - 13140758 - Floating Piston - O-Ring - 48 mmFeaturesSpecsRiding StyleStreetOutside Diameter Imperial1.89''Product NameO-RingTypeFloatingRiding StyleOff-RoadUnitsEachFitment2012-2016KTM500...$1.95 -
Out of stock
Sdi - SRBLK19 - Showa Fork Bladder - Kawasaki
SDI
$17.95Sdi - 13140754 - Showa Fork Bladder - KawasakiFeaturesSpecsUnitsEachRiding StyleOff-RoadTypeForkProduct NameBladderFitment2019-2021KawasakiKX450F2022KawasakiKX 450 F$17.95 -
Sdi - SRBLS18 - Showa Fork Bladder - Suzuki
SDI
$16.95Sdi - 13140756 - Showa Fork Bladder - SuzukiFeaturesSpecsUnitsEachProduct NameBladderRiding StyleOff-RoadTypeForkFitment2018-2022SuzukiRMZ450$16.95 -
Sdi - WRFP46-PDS - Shock Reservoir Piston
SDI
$6.95Sdi - 13140757 - Shock Reservoir PistonFeaturesSpecsUnitsEachProduct NameShock Reservoir PistonRiding StyleOff-RoadFitment2017-2019KTM250 EXC2017-2020KTM350 EXC2017-2020KTM150 XC-W2017-2020KTM250...$6.95 -
Sdi - SRBLS05 - Showa Fork Bladder - 103.5" - Suzuki
SDI
$24.95Sdi - 13140755 - Showa Fork Bladder - 103.5" - SuzukiFeaturesSpecsLength Imperial4.07''Product NameBladderRiding StyleOff-RoadTypeForkUnitsEachLength Metric103.50 mmInside Diameter Imperial1...$24.95 -
Sdi - SRBLK072 - Showa Fork Bladder - Honda
SDI
$18.95Sdi - 13140753 - Showa Fork Bladder - HondaFeaturesSpecsProduct NameBladderLength Metric104.50 mmRiding StyleOff-RoadTypeForkInside Diameter Imperial1.57''Length Imperial4.11''UnitsEachOutside...$18.95 -
Sdi - DRPBK-WP50PDS - DU Piston Bushing Conversion Kit - 50 mm
SDI
$19.95Sdi - 04500622 - DU Piston Bushing Conversion Kit - 50 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsTypePistonRiding StyleOff-RoadFork Tube Diameter...$19.95 -
Sdi - SDERLWXPL-6.5 - Shock Lowering Stop Washer - Rear - Lowers 6.5 mm
SDI
$21.95Sdi - 13140744 - Shock Lowering Stop Washer - Rear - Lowers 6.5 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsHeight Adjustment ImperialLowers 0...$21.95 -
Sdi - SDERLWXPL-2 - Shock Lowering Stop Washer - Rear - Lowers 2 mm
SDI
$20.95Sdi - 13140743 - Shock Lowering Stop Washer - Rear - Lowers 2 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsRiding StyleOff-RoadHeight...$20.95 -
Sdi - DRAVAAA-STD - Schrader Valve Assembly - Standard
SDI
$9.95Sdi - 13140748 - Schrader Valve Assembly - StandardFeaturesSpecsRiding StyleOff-RoadTypeSchraderTypeStandardProduct NameValve AssemblyUnitsKit$9.95 -
Sdi - SDERLWK16-3 - Shock Lowering Stop Washer - Rear - Lowers 3 mm
SDI
$24.95Sdi - 13140741 - Shock Lowering Stop Washer - Rear - Lowers 3 mmFeaturesAble to easily remove and restore the shock to stockPrecision machined out of chromolySpecsRiding StyleOff-RoadHeight...$24.95 -
Sdi - DRPBK-WP50 - DU Piston Bushing Conversion Kit - 50 mm
SDI
$19.95Sdi - 04500620 - DU Piston Bushing Conversion Kit - 50 mmFeaturesDesigned to lower friction and create consistent damping for the life of your oilSpecsUnitsKitTypePistonFork Tube Diameter Imperial1...$19.95
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.