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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
On Sale
FACTORY CONNECTION Front Fork Springs - 0.49 kg/mm LSA-049
FACTORY CONNECTION
MSRP: $159.95Now: $102.00Was: $159.95Suspension geometry is only as good as your springs, and Factory Connection's front fork springs deliver the consistent, predictable performance that separates winners from the rest. Built with precision CNC-wound construction and shot-peened durability,...04050038- SKU:
- 04050038
- Availability:
- Ships Same Business Day
- Weight:
- 3.10 LBS
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- SPRING RATE IMPERIAL:
- 27.40 LB/IN
MSRP: $159.95Now: $102.00Was: $159.95Qty in Cart: 0Quantity:Price:MSRP: $159.95Now: $102.00Was: $159.95Subtotal: -
On Sale
FACTORY CONNECTION Front Fork Springs - 0.45 kg/mm LRL-045
FACTORY CONNECTION
MSRP: $149.99Now: $102.00Was: $149.99Front fork springs are critical to your suspension's ability to maintain consistent ride height, support your vehicle's weight, and absorb impacts without bottoming out. The FACTORY CONNECTION LRL-045 delivers precision-engineered spring rates that...04050044- SKU:
- 04050044
- Availability:
- Ships Same Business Day
- Weight:
- 2.65 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 25.20 LB/IN
- UNITS:
- PAIR
MSRP: $149.99Now: $102.00Was: $149.99 -
On Sale
FACTORY CONNECTION Front Fork Springs - 0.49 kg/mm LRL-049
FACTORY CONNECTION
MSRP: $149.99Now: $102.00Was: $149.99Precision fork springs are foundational to suspension performance—they directly affect your bike's ability to absorb impacts, maintain consistent geometry, and respond predictably under load. Factory Connection's 0.49 kg/mm front fork springs are...04050047- SKU:
- 04050047
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 27.40 LB/IN
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
MSRP: $149.99Now: $102.00Was: $149.99 -
FACTORY CONNECTION Front Fork Springs - 1.00 kg/mm LRV-100
FACTORY CONNECTION
$119.95If you're running a high-performance dirt bike or ATV, fork spring rates directly determine your suspension's ability to handle aggressive terrain and maintain consistent contact with the ground. Factory Connection's precision-engineered springs deliver...04050322- SKU:
- 04050322
- Availability:
- Ships Same Business Day
- Weight:
- 2.87 LBS
- SPRING RATE IMPERIAL:
- 56.00 LB/IN
- TYPE:
- FORK
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- EACH
$119.95Qty in Cart: 0Quantity:Price:$119.95Subtotal: -
PROX Fork Seal/Wiper Kit - 48 mm ID x 58 mm OD x 9.4 mm T 40.S48589.4
PROX
$73.95Fork seals and wipers are critical wear items that directly impact your suspension's performance and longevity. Degraded seals allow oil to escape and contamination to enter, reducing damping efficiency and accelerating internal component wear. The PROX...04070348- SKU:
- 04070348
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER:
- 58,00 MM (2,28')
- THICKNESS IMPERIAL:
- 0.37'
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 9,40 MM (0,37')
- UNITS:
- KIT
- INSIDE DIAMETER:
- 48,00 MM (1,89')
$73.95 -
PROX Fork Seal/Wiper Kit - 35 mm ID x 48 mm OD x 11 mm T 40.S354811
PROX
$41.95Fork seals and wipers are critical wear items that directly impact your suspension's performance and longevity. Worn seals allow hydraulic fluid to escape, leading to reduced damping, poor handling, and potential fork damage—exactly what you can't afford...04070184- SKU:
- 04070184
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- OUTSIDE DIAMETER:
- 48,00 MM (1,89')
- PRODUCT NAME:
- FORK SEAL/WIPER
- THICKNESS IMPERIAL:
- 0.43'
- UNITS:
- KIT
- INSIDE DIAMETER:
- 35,00 MM (1,38')
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 11,00 MM (0,43')
$41.95 -
On Sale
PROX Fork Seal/Wiper Kit - 48 mm ID x 57.80 mm OD x 9 mm T 40.S4857.89
PROX
MSRP: $62.95Now: $51.00Was: $62.95Fork seals wear out—it's not a question of if, but when. Worn seals compromise suspension performance, allow hydraulic fluid to leak onto your brakes, and can damage fork internals if left unchecked. The PROX Fork Seal/Wiper Kit gives you genuine NOK...04070188- SKU:
- 04070188
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- INSIDE DIAMETER:
- 48,00 MM (1,89')
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER:
- 57,80 MM (2,28')
- THICKNESS:
- 9,00 MM (0,35')
- THICKNESS IMPERIAL:
- 0.35'
- UNITS:
- KIT
- PRODUCT NAME:
- FORK SEAL/WIPER
MSRP: $62.95Now: $51.00Was: $62.95 -
On Sale
PROX Fork Protectors - 130 mm 40.FSP1304450
PROX
MSRP: $22.95Now: $17.00Was: $22.95Fork seals are vulnerable to damage from rocks, sand, and debris encountered during aggressive riding—compromising suspension performance and leading to costly repairs. PROX Fork Protectors shield your fork seals and tubes with durable neoprene...04060109- SKU:
- 04060109
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- YELLOW
- LENGTH IMPERIAL:
- 5.125'
- TYPE:
- FORK
- UNITS:
- PAIR
- FOR FORK TUBE DIAMETER IMPERIAL:
- 1.73' - 1.98'
- PRODUCT NAME:
- PROTECTOR
- BASE COLOR:
- BLACK
MSRP: $22.95Now: $17.00Was: $22.95 -
On Sale
PROX Fork Protectors - 360 mm 40.FSP3604450
PROX
MSRP: $23.95Now: $21.00Was: $23.95Fork seals are vulnerable to contamination from sand, rocks, and trail debris—damage that can compromise suspension performance and lead to costly repairs. PROX Fork Protectors shield your seals with durable neoprene coverage, extending the life of your...04060110- SKU:
- 04060110
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- YELLOW
- TYPE:
- FORK
- UNITS:
- PAIR
- FOR FORK TUBE DIAMETER IMPERIAL:
- 1.73' - 1.98'
- LENGTH IMPERIAL:
- 14.16'
- PRODUCT NAME:
- PROTECTOR
- BASE COLOR:
- BLACK
MSRP: $23.95Now: $21.00Was: $23.95 -
On Sale
PROX Fork Seal/Wiper Kit - KX65 40.S334611P
PROX
MSRP: $41.95Now: $34.00Was: $41.95Fork seals and wipers are critical wear items that directly impact your suspension's performance and longevity. A degraded seal allows hydraulic fluid to escape, compromising damping consistency and risking internal fork damage. This genuine NOK...04070679- SKU:
- 04070679
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER:
- -
- THICKNESS:
- -
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS IMPERIAL:
- -
- UNITS:
- KIT
- INSIDE DIAMETER:
- 43,00 MM (1,69')
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Fork Seal/Wiper Kit - KTM 50 40.S354611P
PROX
MSRP: $39.95Now: $34.00Was: $39.95Fork seals and wipers are critical wear items that directly impact your KTM 50's handling precision and suspension reliability. Degraded seals allow hydraulic fluid to escape, compromising damping performance and inviting contamination that can damage...04070680- SKU:
- 04070680
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- INSIDE DIAMETER:
- 35,00 MM (1,37')
- THICKNESS:
- -
- OUTSIDE DIAMETER:
- -
- THICKNESS IMPERIAL:
- -
MSRP: $39.95Now: $34.00Was: $39.95 -
On Sale
PROX Fork Seal/Wiper Kit 40.S354710P
PROX
MSRP: $41.95Now: $34.00Was: $41.95Fork seals and wipers are critical wear items that directly impact suspension performance and longevity. Deteriorated seals allow hydraulic fluid to leak onto your suspension components, compromising damping characteristics and risking internal corrosion...04070308- SKU:
- 04070308
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- THICKNESS IMPERIAL:
- -
- INSIDE DIAMETER:
- 35,00 MM (1,37')
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- -
- UNITS:
- KIT
- OUTSIDE DIAMETER:
- -
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Fork Seal/Wiper Kit - 37 mm ID x 50 mm OD x 11 mm T 40.S375011
PROX
MSRP: $52.95Now: $42.00Was: $52.95Worn fork seals compromise suspension performance and accelerate component degradation—hydraulic fluid seeps past damaged seals, reducing damping consistency and inviting contamination into your forks. These genuine NOK replacement seals restore proper...402375- SKU:
- 402375
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- INSIDE DIAMETER:
- 37,00 MM (1,46')
- OUTSIDE DIAMETER:
- 50,00 MM (1,97')
- PRODUCT NAME:
- FORK SEAL/WIPER
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 11,00 MM (0,43')
- THICKNESS IMPERIAL:
- 0.43'
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
PROX Fork Seal/Wiper Kit - 45 mm ID x 55 mm OD x 11 mm T 40.S455711
PROX
MSRP: $52.95Now: $42.00Was: $52.95Worn fork seals compromise suspension performance and invite hydraulic fluid loss, degrading damping response and risking component damage. The PROX Fork Seal/Wiper Kit restores OEM-spec sealing integrity with genuine NOK replacement components, ensuring...402455- SKU:
- 402455
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- THICKNESS:
- 11,00 MM (0,43')
- INSIDE DIAMETER:
- 45,00 MM (1,77')
- THICKNESS IMPERIAL:
- 0.43'
- OUTSIDE DIAMETER:
- 55,00 MM (2,17')
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
PROX Fork Seal/Wiper Kit - 47 mm ID x 58 mm OD x 10 mm T 40.S475810
PROX
MSRP: $62.95Now: $51.00Was: $62.95Fork seals deteriorate with every ride, allowing oil to weep onto your brakes and reducing suspension responsiveness. A quality seal replacement restores hydraulic integrity and prevents costly suspension damage down the line. This genuine NOK kit...402475- SKU:
- 402475
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- INSIDE DIAMETER:
- 47,00 MM (1,85')
- PRODUCT NAME:
- FORK SEAL/WIPER
- THICKNESS:
- 10,00 MM (0,39')
- THICKNESS IMPERIAL:
- 0.39'
- UNITS:
- KIT
- OUTSIDE DIAMETER:
- 58,00 MM (2,28')
- RIDING STYLE:
- OFF-ROAD
MSRP: $62.95Now: $51.00Was: $62.95 -
On Sale
PROX Fork Seal/Wiper Kit 40.S496011
PROX
MSRP: $67.95Now: $55.00Was: $67.95Fork seals and wipers are critical wear items that directly impact suspension performance and fork longevity. Degraded seals allow oil leakage and contamination, leading to poor damping, reduced responsiveness, and potential fork damage. This genuine NOK...402495- SKU:
- 402495
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- INSIDE DIAMETER:
- 49,00 MM (1,93')
- RIDING STYLE:
- STREET
- THICKNESS IMPERIAL:
- -
- OUTSIDE DIAMETER:
- -
- UNITS:
- KIT
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- -
MSRP: $67.95Now: $55.00Was: $67.95 -
On Sale
PROX Fork Seal/Wiper Kit - 43 mm ID x 54 mm OD x 11 mm T 40.S435411
PROX
MSRP: $52.95Now: $42.00Was: $52.95Fork seals degrade with every ride—heat cycles, dust contamination, and hydraulic pressure take their toll. PROX genuine NOK replacement seals restore proper oil retention and suspension performance, eliminating leaks that compromise handling and fork...04070185- SKU:
- 04070185
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- FORK SEAL/WIPER
- THICKNESS IMPERIAL:
- 0.43'
- INSIDE DIAMETER:
- 43,00 MM (1,69')
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 11,00 MM (0,43')
- UNITS:
- KIT
- OUTSIDE DIAMETER:
- 54,00 MM (2,13')
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
PROX Fork Seal/Wiper Kit - 43 mm ID x 52.9 mm OD x 9 mm T 40.S4352.99P
PROX
MSRP: $41.95Now: $34.00Was: $41.95Fork seals and wipers are wear items that degrade with every ride, allowing oil to escape and contaminants to enter your suspension system. A failed seal compromises damping performance, reduces fork responsiveness, and accelerates internal component...04070499- SKU:
- 04070499
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- INSIDE DIAMETER:
- 43,00 MM (1,69')
- THICKNESS:
- 9,00 MM (0,35')
- THICKNESS IMPERIAL:
- 0.35'
- OUTSIDE DIAMETER:
- 52,90 MM (2,08')
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Fork Seal/Wiper Kit - 48 mm ID x 58 mm OD x 10 mm T 40.S485810
PROX
MSRP: $60.95Now: $51.00Was: $60.95Fork seals and wipers are critical consumables that directly impact your suspension's performance and longevity. Worn seals allow hydraulic fluid to escape and contamination to enter, degrading damping characteristics and increasing internal wear. The...402485- SKU:
- 402485
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- FORK SEAL/WIPER
- THICKNESS:
- 10,00 MM (0,39')
- THICKNESS IMPERIAL:
- 0.39'
- UNITS:
- KIT
- INSIDE DIAMETER:
- 48,00 MM (1,89')
- OUTSIDE DIAMETER:
- 58,00 MM (2,28')
- RIDING STYLE:
- OFF-ROAD
MSRP: $60.95Now: $51.00Was: $60.95 -
On Sale
PROX Fork Seal/Wiper Kit - 43 mm ID x 55 mm OD x 9 mm T 40.S43559
PROX
MSRP: $52.95Now: $42.00Was: $52.95Fork seals and wipers are critical wear items that directly impact suspension performance and longevity. Over time, degraded seals allow hydraulic fluid to escape and contamination to enter, resulting in poor damping response and potential fork damage...402435- SKU:
- 402435
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- THICKNESS IMPERIAL:
- 0.35'
- THICKNESS:
- 9,00 MM (0,35')
- INSIDE DIAMETER:
- 43,00 MM (1,69')
- OUTSIDE DIAMETER:
- 55,00 MM (2,17')
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $52.95Now: $42.00Was: $52.95
