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
-
PARTS UNLIMITED Fork Seals - 43 mm ID x 53.4 mm OD x 5.8/11.8 mm T PUP40FORK455125
PARTS UNLIMITED
$49.95Fork seals are critical wear items that directly impact your suspension's performance and longevity. Degraded seals allow hydraulic fluid to escape and contaminants to enter, compromising damping characteristics and risking fork damage. These...04070270- SKU:
- 04070270
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- INSIDE DIAMETER METRIC:
- 43.00 MM
- UNITS:
- PAIR
- PRODUCT NAME:
- FORK SEAL
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 53.40 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 5.80 MM/11.80 MM
$49.95 -
PARTS UNLIMITED Fork Seals - 48 mm ID x 58.4 mm OD x 5.8/11.8 mm T PUP40FORK455126
PARTS UNLIMITED
$49.95Worn fork seals compromise suspension performance and invite hydraulic fluid leakage that accelerates component degradation. These PARTS UNLIMITED replacement seals restore the pressure integrity of your fork assembly, ensuring consistent damping control...04070271- SKU:
- 04070271
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- FORK SEAL
- OUTSIDE DIAMETER METRIC:
- 58.40 MM
- THICKNESS METRIC:
- 5.80 MM/11.80 MM
- INSIDE DIAMETER METRIC:
- 48.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
$49.95 -
PARTS UNLIMITED Fork Seals - 48 mm ID x 58.4 mm OD x 5.8/13.3 mm T PUP40FORK455140
PARTS UNLIMITED
$53.95Fork seals are critical wear items that directly impact suspension performance, handling precision, and fork longevity. Worn or leaking seals allow hydraulic fluid to escape, compromising damping characteristics and exposing internal components to...04070272- SKU:
- 04070272
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 58.40 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 48.00 MM
- THICKNESS METRIC:
- 5.80 MM/13.30 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$53.95 -
PARTS UNLIMITED Fork Seals - 45 mm ID x 58.4 mm OD x 4.6/14 mm T PUP40FORK455179
PARTS UNLIMITED
$46.95Fork seals are critical wear items that deteriorate with every riding season, allowing oil to migrate past the seal and compromising your suspension's damping performance and handling precision. This PARTS UNLIMITED replacement set restores...04070291- SKU:
- 04070291
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- INSIDE DIAMETER METRIC:
- 45.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 58.40 MM
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 4.60 MM/14.00 MM
- UNITS:
- PAIR
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$46.95 -
MOOSE RACING Fork Seal Kit - 48 mm 56-146
MOOSE RACING
$39.95Fork seals are critical wear items that directly impact your suspension's performance and longevity. Stock OEM seals degrade quickly under racing conditions, leading to fluid leakage, loss of damping control, and costly fork rebuilds. The MOOSE RACING...04070102- SKU:
- 04070102
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 9.50 MM
- PRODUCT NAME:
- FORK SEAL KIT
- INSIDE DIAMETER METRIC:
- 48.00 MM
- OUTSIDE DIAMETER METRIC:
- 58.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.95 -
MOOSE RACING Fork Seal Kit - 43 mm 56-136
MOOSE RACING
$37.95Fork seals wear faster than most riders expect—degraded seals allow oil to migrate into your dust wipers, compromising suspension performance and damaging internal components. The MOOSE RACING 43mm Fork Seal Kit addresses this with a patented MAX-LIFE...04070178- SKU:
- 04070178
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- INSIDE DIAMETER METRIC:
- 43.00 MM
- OUTSIDE DIAMETER METRIC:
- 55.00 MM
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 10.50 MM
- UNITS:
- KIT
- PRODUCT NAME:
- FORK SEAL KIT
- RIDING STYLE:
- STREET
$37.95 -
MOOSE RACING Fork Seal Kit - 32 mm 56-154
MOOSE RACING
$39.95Fork seals wear faster than almost any other suspension component, and worn seals mean oil weeping, reduced damping, and premature fork failure. The MOOSE RACING 32 mm 56-154 Fork Seal Kit extends seal life to 3-4 times longer than OEM seals by using a...04070143- SKU:
- 04070143
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- OUTSIDE DIAMETER METRIC:
- 42.20 MM
- PRODUCT NAME:
- FORK SEAL KIT
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 32.00 MM
- THICKNESS METRIC:
- 6.50 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$39.95 -
MOOSE RACING Steering Stem Bearing Kit 22-1061
MOOSE RACING
$40.95Worn steering stem bearings create play, imprecision, and accelerated wear throughout your front-end geometry. The MOOSE RACING Steering Stem Bearing Kit 22-1061 replaces inferior ball-type bearings with tapered roller bearings—a proven upgrade that...04100122- SKU:
- 04100122
- Availability:
- Ships Same Business Day
- Weight:
- 0.58 LBS
- MODEL:
- TAPERED ROLLER
- PRODUCT NAME:
- BEARING
- TYPE:
- STEERING STEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$40.95Qty in Cart: 0Quantity:Price:$40.95Subtotal: -
MOOSE RACING Steering Stem Bearing Kit 22-1042
MOOSE RACING
$49.95OEM ball bearings in your steering stem create friction, play, and accelerated wear—especially under aggressive riding or racing conditions. The MOOSE RACING Steering Stem Bearing Kit 22-1042 replaces them with precision tapered roller bearings that...04100014- SKU:
- 04100014
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- MODEL:
- TAPERED ROLLER
- PRODUCT NAME:
- BEARING
- TYPE:
- STEERING STEM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$49.95 -
MOOSE RACING Steering Stem Bearing Kit 22-1044
MOOSE RACING
$30.95Stock ball-type steering stem bearings wear quickly and demand constant maintenance—tapered roller bearings eliminate this headache while delivering noticeably smoother steering and longer service life. This complete kit upgrades your bike's front-end...04100019- SKU:
- 04100019
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- MODEL:
- TAPERED ROLLER
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STEERING STEM
$30.95 -
MOOSE RACING Steering Stem Bearing Kit 22-1001
MOOSE RACING
$52.95OEM ball-type steering stem bearings wear quickly and require frequent maintenance—taper bearings eliminate this problem entirely. The MOOSE RACING Steering Stem Bearing Kit 22-1001 upgrades your front end with precision tapered roller bearings that...04100020- SKU:
- 04100020
- Availability:
- Ships Same Business Day
- Weight:
- 0.68 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STEERING STEM
- UNITS:
- KIT
- MODEL:
- TAPERED ROLLER
$52.95 -
MOOSE RACING Steering Stem Bearing Kit 22-1002-M
MOOSE RACING
$57.95A worn or degraded steering stem bearing directly impacts your bike's handling precision and requires constant maintenance. The MOOSE RACING Steering Stem Bearing Kit upgrades your OEM ball-type bearings to superior tapered roller bearings, delivering...04100021- SKU:
- 04100021
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STEERING STEM
- UNITS:
- KIT
- MODEL:
- TAPERED ROLLER
$57.95 -
MOOSE RACING Steering Stem Bearing Kit 22-1008
MOOSE RACING
$57.95Steering stem bearings wear faster than most riders realize, causing play in your bars and unpredictable handling at speed. The MOOSE RACING 22-1008 upgrades your front end with tapered roller bearings—the same bearing design trusted in high-performance...04100024- SKU:
- 04100024
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- STEERING STEM
- MODEL:
- TAPERED ROLLER
$57.95 -
PARTS UNLIMITED Fork Seals - 49 mm ID x 60.5 mm OD x 10.5 mm T PUP40FORK455209
PARTS UNLIMITED
$44.95Fork seals are critical to maintaining suspension performance and preventing hydraulic fluid contamination that compromises damping characteristics. Worn or leaking seals force you into premature fork rebuilds and degraded handling—exactly what you don't...04070502- SKU:
- 04070502
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- INSIDE DIAMETER METRIC:
- 49.00 MM
- OUTSIDE DIAMETER METRIC:
- 60.50 MM - 64.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 5.00 MM/10.50 MM
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$44.95 -
PARTS UNLIMITED Fork Seals - 33 mm ID x 46.3 mm OD x 14.7 mm T PUP40FORK455119
PARTS UNLIMITED
$69.95Fork seals are critical wear items that directly impact your suspension's performance and longevity. Worn or leaking seals compromise damping consistency, reduce handling precision, and allow dirt ingress that accelerates internal component degradation...04070136- SKU:
- 04070136
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- MATERIAL:
- RUBBER
- THICKNESS METRIC:
- 14.70 MM
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 46.30 MM
- PRODUCT NAME:
- FORK SEAL
- INSIDE DIAMETER METRIC:
- 33.00 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$69.95 -
PARTS UNLIMITED Fork Seals - 48 mm ID x 58 mm OD x 9 mm T PUP40FORK455128
PARTS UNLIMITED
$59.95Fork seals are critical wear items that directly impact your suspension's ability to maintain oil pressure and damping consistency. Worn or leaking seals compromise handling precision and can lead to costly internal fork damage if left unaddressed. PARTS...04070215- SKU:
- 04070215
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- FORK SEAL
- THICKNESS METRIC:
- 9.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 58.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 48.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$59.95 -
PARTS UNLIMITED Fork Seals - 37 mm ID x 50 mm OD x 11 mm T - NOK PUP40FORK455143
PARTS UNLIMITED
$34.95Worn fork seals compromise suspension performance and invite hydraulic fluid leakage that accelerates internal wear. These PARTS UNLIMITED replacement seals restore proper damping function and suspension responsiveness, whether you're maintaining a...04070265- SKU:
- 04070265
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- NOK ANTI-STICTION
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- PRODUCT NAME:
- FORK SEAL
- OUTSIDE DIAMETER METRIC:
- 50.00 MM
- THICKNESS METRIC:
- 11.00 MM
- INSIDE DIAMETER METRIC:
- 37.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$34.95 -
PARTS UNLIMITED Fork Seals - 38 mm ID x 50 mm OD x 8/9.5 mm T - NOK PUP40FORK455152
PARTS UNLIMITED
$40.95Fork seals are a critical maintenance item that directly impacts your suspension's performance and longevity. Worn or leaking seals allow hydraulic fluid to escape, compromising damping characteristics and risking internal corrosion of fork tubes. This...04070267- SKU:
- 04070267
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 50.00 MM
- THICKNESS METRIC:
- 8.00 MM/9.50 MM
- INSIDE DIAMETER METRIC:
- 38.00 MM
- MATERIAL:
- NOK ANTI-STICTION
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$40.95 -
PARTS UNLIMITED Fork Seals - 37 mm ID x 50 mm OD x 8 mm T PUP40FORK455177
PARTS UNLIMITED
$22.95Fork seals are critical wear components that prevent hydraulic fluid leakage and maintain suspension responsiveness—neglecting them leads to compromised damping, air infiltration, and accelerated fork degradation. PARTS UNLIMITED Fork Seals are...04070268- SKU:
- 04070268
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 37.00 MM
- OUTSIDE DIAMETER METRIC:
- 50.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- FORK SEAL
- UNITS:
- PAIR
- THICKNESS METRIC:
- 8.00 MM
$22.95 -
PARTS UNLIMITED Fork Seals - 35 mm ID x 48 mm OD x 11 mm T PUP40FORK455032
PARTS UNLIMITED
$11.95Fork seals are your first line of defense against oil leakage and contamination in your suspension system. Worn or damaged seals compromise damping performance, reduce ride quality, and can lead to costly internal fork damage if left unchecked. These...FS011- SKU:
- FS011
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- FORK SEAL
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 35.00 MM
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 11.00 MM
- OUTSIDE DIAMETER METRIC:
- 48.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$11.95
