Dirt Bike Front Suspension
Dirt Bike Front Suspension Parts: Fork Springs, Guards & Launch Devices for Yamaha at JJ Motorsports
Enhance your dirt bike's front suspension with premium parts from JJ Motorsports, designed for smoother damping and protection in motocross, enduro, and trail riding. These components improve handling and reduce wear for reliable performance.
Shop Works Connection, Moose Racing, and Polisport front suspension parts for durable, easy-to-install upgrades. Explore related categories such as dirt bike suspension for shocks and bushings, or dirt bike for full builds to complete your setup and achieve balanced, responsive handling across all conditions, from high-speed jumps to technical singletrack.
Top Dirt Bike Front Suspension Parts
- Works Connection Pro Launch Start Device Yamaha 12-416 – Adjustable launch device for Yamaha YZ; reduces fork compression for better starts.
- Moose Racing Fork Springs 31 mm 2.4 N/mm 0405-1120 – Progressive fork springs for 31mm tubes; improves damping on Kawasaki KX models.
- Polisport Fork Guard Cover Black 8398100002 – Black plastic fork guards; protects stanchions from rocks on Honda CRF.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
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- Price
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SDI Spring Perch Set - YZ250F/450F SDETCV24-MX-SET
SDI
$104.95If your YZ250F or YZ450F is bottoming out on bigger hits or washing out through rough terrain, a properly tuned spring perch directly impacts how your suspension responds under load. This set lets you dial in the perfect balance between initial support...04500608- SKU:
- 04500608
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$104.95Qty in Cart: 0Quantity:Price:$104.95Subtotal: -
SDI Spring Perch Set SDETCV24-SET
SDI
$104.95Suspension geometry directly impacts how your bike handles under load and through the stroke. The SDI Spring Perch Set SDETCV24-SET gives you the tuning capability to dial in optimal bottoming resistance and extract deeper performance from your...04500609- SKU:
- 04500609
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$104.95 -
SDI Spring Perch Set SDETCV25-SET
SDI
$110.95Fine-tuning suspension geometry is critical for maximizing both comfort and control across varied terrain, and the SDI Spring Perch Set SDETCV25-SET delivers the adjustability you need without expensive re-valving or complete shock replacement. By...04500610- SKU:
- 04500610
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$110.95 -
SDI Spring Perch Set - KTM/Husqvarna SDETCVWP
SDI
$104.95If you're running out of suspension travel on aggressive terrain or experiencing harsh bottoming on deep compressions, the SDI Spring Perch Set addresses these issues directly by optimizing your shock's geometry and stroke characteristics. This U.S.-made...04500611- SKU:
- 04500611
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$104.95 -
SDI Spring Perch Set - YZ250F/450F SDETCV18-MXSET
SDI
$110.95Suspension geometry directly impacts how your YZ handles across different terrains—and a quality spring perch set is essential for dialing in the performance you need. The SDI Spring Perch Set gives you the adjustability to tune your bike's bottoming...04500612- SKU:
- 04500612
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$110.95 -
SDI Spring Perch Set - YZ250F/450F SDETCVY18-SET
SDI
$110.95Suspension geometry directly impacts your bike's stability and comfort, especially during aggressive riding or rough terrain. The SDI Spring Perch Set lets you dial in your YZ250F/450F's suspension characteristics without replacing major components,...04500613- SKU:
- 04500613
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$110.95 -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-KTB50
SDI
$19.95Stock piston wear bands deteriorate rapidly under damping cycles, causing friction buildup and inconsistent suspension response within the first few hours of use. The SDI DU Piston Bushing Conversion Kit replaces this wear band with a DU composite...04500615- SKU:
- 04500615
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 40 mm DRPBK-SH40
SDI
$19.95Stock piston rings are a compromise between cost and performance—they wear rapidly during initial operation, causing your damping characteristics to shift unpredictably within the first five hours. The SDI DU Piston Bushing Conversion Kit replaces that...04500616- SKU:
- 04500616
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-SH50
SDI
$19.95Stock piston rings shed their wear band rapidly, often within the first five hours of operation, causing unpredictable low-speed damping and performance loss. The SDI DU Piston Bushing Conversion Kit eliminates this inconsistency by replacing that wear...04500617- SKU:
- 04500617
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
SDI DU Piston Bushing Conversion Kit - 36 mm DRPBK-WP36
SDI
$19.95Stock piston wear bands degrade rapidly, causing inconsistent damping within the first five hours of operation and compromising your suspension's performance throughout the oil's service life. The SDI DU Piston Bushing Conversion Kit replaces this wear...04500618- SKU:
- 04500618
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 46 mm DRPBK-WP46XPL
SDI
$19.95Stock piston rings wear dramatically within the first five hours of operation, degrading low-speed damping and compromising suspension consistency when you need it most. This DU Piston Bushing Conversion Kit eliminates that performance loss by replacing...04500619- SKU:
- 04500619
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-WP50
SDI
$19.95Stock wear bands degrade rapidly under damping loads, causing inconsistent performance and accelerated component wear within the first five hours of operation. The SDI DU Piston Bushing Conversion Kit replaces that compromised design with a low-friction...04500620- SKU:
- 04500620
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-WP5016
SDI
$19.95Stock piston wear bands degrade rapidly, causing inconsistent damping and unpredictable handling within the first five hours of operation. The SDI DU Piston Bushing Conversion Kit eliminates this performance loss by replacing the wear band with a...04500621- SKU:
- 04500621
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
SDI DU Piston Bushing Conversion Kit - 50 mm DRPBK-WP50PDS
SDI
$19.95Stock piston wear bands typically degrade within the first five hours of use, compromising damping consistency and forcing premature rebuilds. The SDI DU Piston Bushing Conversion Kit replaces this wear point with a durable alternative that maintains...04500622- SKU:
- 04500622
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95 -
SDI DU Piston Bushing Conversion Kit - 40 mm DRPBK-KYB40
SDI
$19.95Stock piston rings wear rapidly during initial operation, compromising your damper's low-speed performance within just five hours of use. The SDI DU Piston Bushing Conversion Kit replaces that stock wear band with a precision-engineered bushing that...04500623- SKU:
- 04500623
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
On Sale
SDI Fork Service Kit - 43 mm KFSK43
SDI
MSRP: $79.95Now: $51.00Was: $79.95Proper fork maintenance directly impacts suspension responsiveness, damping consistency, and overall ride quality—neglecting service leads to performance degradation and premature wear. The SDI Fork Service Kit for 43mm forks consolidates every component...04500625- SKU:
- 04500625
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
MSRP: $79.95Now: $51.00Was: $79.95Qty in Cart: 0Quantity:Price:MSRP: $79.95Now: $51.00Was: $79.95Subtotal: -
SDI Fork Service Kit - 46 mm KFSK46
SDI
$79.95Proper fork maintenance is critical to preserving your suspension's responsiveness, damping characteristics, and structural integrity—especially if you're pushing performance limits on track or trail. This comprehensive service kit eliminates the...04500626- SKU:
- 04500626
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
$79.95 -
SDI Fork Service Kit - 48 mm KSFK48
SDI
$89.95A properly serviced fork is the foundation of responsive handling and rider confidence. This complete service kit eliminates the guesswork—no hunting for individual seals, fluids, or wear components across multiple suppliers. Keep your 48 mm forks...04500627- SKU:
- 04500627
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$89.95 -
SDI Fork Service Kit - 37 mm SFSK37
SDI
$74.95Proper fork maintenance is non-negotiable for suspension performance and rider safety. This complete service kit eliminates the guesswork by providing every seal, fluid, and component needed to restore your 37mm forks to factory specifications. Whether...04500628- SKU:
- 04500628
- Availability:
- Ships Same Business Day
- Weight:
- 0.43 LBS
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal: -
SDI Fork Service Kit - 47 mm SFSK47
SDI
$74.95Proper fork maintenance is critical to maintaining responsive handling and consistent performance on the track or trail. The SDI Fork Service Kit - 47 mm delivers all the seals, bushings, and internal components you need to restore your forks to factory...04500629- SKU:
- 04500629
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$74.95Qty in Cart: 0Quantity:Price:$74.95Subtotal:
