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: $159.95Cold-wound on precision CNC equipment for the ultimate in strength, Heat-tempered, shot-peened and end-ground for durability, Preset for fatigue resistance, Accurate rates and proper fitment assured, Made in the U.S.A.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: $159.95Now: $102.00Was: $159.95Cold-wound on precision CNC equipment for the ultimate in strength, Heat-tempered, shot-peened and end-ground for durability, Preset for fatigue resistance, Accurate rates and proper fitment assured, Made in the U.S.A.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: $159.95Now: $102.00Was: $159.95 -
On Sale
FACTORY CONNECTION Front Fork Springs - 0.49 kg/mm LRL-049
FACTORY CONNECTION
MSRP: $159.95Now: $102.00Was: $159.95Cold-wound on precision CNC equipment for the ultimate in strength, Heat-tempered, shot-peened and end-ground for durability, Preset for fatigue resistance, Accurate rates and proper fitment assured, Made in the U.S.A.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: $159.95Now: $102.00Was: $159.95 -
FACTORY CONNECTION Front Fork Springs - 1.00 kg/mm LRV-100
FACTORY CONNECTION
$119.95Cold-wound on precision CNC equipment for the ultimate in strength, Heat-tempered, shot-peened and end-ground for durability, Preset for fatigue resistance, Accurate rates and proper fitment assured, Made in the U.S.A.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
$119.95 -
PROX Fork Seal/Wiper Kit - 48 mm ID x 58 mm OD x 9.4 mm T 40.S48589.4
PROX
$69.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070348- 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')
$69.95 -
PROX Fork Seal/Wiper Kit - 35 mm ID x 48 mm OD x 11 mm T 40.S354811
PROX
$39.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070184- 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')
$39.95 -
PROX Fork Seal/Wiper Kit - 48 mm ID x 57.80 mm OD x 9 mm T 40.S4857.89
PROX
$59.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070188- 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
$59.95 -
PROX Fork Protectors - 130 mm 40.FSP1304450
PROX
$19.95Made of stretchy and durable neoprene, Protect the fork seal from sand, rocks and other hazards, 130 mm length will cover the fork seal and short part of the fork tube, 360 mm will cover the entire fork tube, Simple and easy fit, includes zip ties04060109- 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
$19.95 -
PROX Fork Protectors - 360 mm 40.FSP3604450
PROX
$24.95Made of stretchy and durable neoprene, Protect the fork seal from sand, rocks and other hazards, 130 mm length will cover the fork seal and short part of the fork tube, 360 mm will cover the entire fork tube, Simple and easy fit, includes zip ties04060110- 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
$24.95 -
PROX Fork Seal/Wiper Kit - KX65 40.S334611P
PROX
$39.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070679- 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')
$39.95 -
PROX Fork Seal/Wiper Kit - KTM 50 40.S354611P
PROX
$39.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070680- 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:
- -
$39.95 -
PROX Fork Seal/Wiper Kit 40.S354710P
PROX
$39.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070308- 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:
- -
$39.95 -
PROX Fork Seal/Wiper Kit - 37 mm ID x 50 mm OD x 11 mm T 40.S375011
PROX
$49.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers402375- 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'
$49.95 -
PROX Fork Seal/Wiper Kit - 45 mm ID x 55 mm OD x 11 mm T 40.S455711
PROX
$49.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers402455- 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
$49.95 -
PROX Fork Seal/Wiper Kit - 47 mm ID x 58 mm OD x 10 mm T 40.S475810
PROX
$59.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers402475- 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
$59.95 -
PROX Fork Seal/Wiper Kit 40.S496011
PROX
$64.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers402495- 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:
- -
$64.95 -
PROX Fork Seal/Wiper Kit - 43 mm ID x 54 mm OD x 11 mm T 40.S435411
PROX
$49.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070185- 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')
$49.95 -
PROX Fork Seal/Wiper Kit - 43 mm ID x 52.9 mm OD x 9 mm T 40.S4352.99P
PROX
$39.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers04070499- 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
$39.95 -
PROX Fork Seal/Wiper Kit - 48 mm ID x 58 mm OD x 10 mm T 40.S485810
PROX
$59.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers402485- 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
$59.95 -
PROX Fork Seal/Wiper Kit - 43 mm ID x 55 mm OD x 9 mm T 40.S43559
PROX
$49.95Genuine NOK replacement fork seals and wipers, Sold in sets of two fork seals and two wipers402435- 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
$49.95
