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 - 33 mm ID x 46.3 mm OD x 14.7 mm T PUP40FORK455119
PARTS UNLIMITED
$71.35Fork 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
$71.35 -
PARTS UNLIMITED Fork Seals - 48 mm ID x 58 mm OD x 9 mm T PUP40FORK455128
PARTS UNLIMITED
$61.15Fork 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
$61.15 -
PARTS UNLIMITED Fork Seals - 37 mm ID x 50 mm OD x 11 mm T - NOK PUP40FORK455143
PARTS UNLIMITED
$35.65Worn 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
$35.65 -
PARTS UNLIMITED Fork Seals - 38 mm ID x 50 mm OD x 8/9.5 mm T - NOK PUP40FORK455152
PARTS UNLIMITED
$41.77Fork 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
$41.77 -
PARTS UNLIMITED Fork Seals - 37 mm ID x 50 mm OD x 8 mm T PUP40FORK455177
PARTS UNLIMITED
$23.41Fork 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
$23.41 -
PARTS UNLIMITED Fork Seals - 35 mm ID x 48 mm OD x 11 mm T PUP40FORK455032
PARTS UNLIMITED
$12.19Fork 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
$12.19 -
PARTS UNLIMITED Fork Seals - 36 mm ID x 48 mm OD x 8/9.5 mm T PUP40FORK455035
PARTS UNLIMITED
$11.17Worn fork seals are a common culprit behind loss of suspension responsiveness and premature fork failure. The PARTS UNLIMITED Fork Seals deliver OEM-specification performance to restore your suspension's damping characteristics and protect internal fork...FS012- SKU:
- FS012
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 48.00 MM
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 36.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 8.00 MM/9.50 MM
$11.17 -
PARTS UNLIMITED Fork Seals - 36 mm ID x 48 mm OD x 10.5 mm T PUP40FORK455036
PARTS UNLIMITED
$11.17Fork seals are critical wear items that directly impact your suspension's performance and longevity. Degraded or leaking seals allow hydraulic fluid to escape, compromising damping characteristics and risking internal fork damage. These OEM-specification...FS013- SKU:
- FS013
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 36.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 10.50 MM
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 48.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$11.17 -
PARTS UNLIMITED Fork Seals - 36 mm x 48 mm x 11 mm PUP40FORK455037
PARTS UNLIMITED
$12.19Fork seals are critical wear items that directly impact suspension performance and bike handling—degraded seals allow oil to escape, compromising damping and increasing wear on internal fork components. This PARTS UNLIMITED replacement set restores...FS014- SKU:
- FS014
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- OUTSIDE DIAMETER METRIC:
- 48.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 36.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- THICKNESS METRIC:
- 11.00 MM
$12.19 -
PARTS UNLIMITED Fork Seals - 38 mm ID x 50 mm OD x 10.5 mm T PUP40FORK455044
PARTS UNLIMITED
$11.17Fork seals are critical wear items that directly impact your suspension's performance and longevity. A compromised seal allows hydraulic fluid to leak onto your fork tubes and brakes, degrading braking power and damaging suspension geometry. These PARTS...FS019- SKU:
- FS019
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 10.50 MM
- INSIDE DIAMETER METRIC:
- 38.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 50.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
$11.17 -
PARTS UNLIMITED Fork Seals - 40 mm ID x 52 mm OD x 8 mm T PUP40FORK455049
PARTS UNLIMITED
$12.19Fork seal failure compromises your suspension's ability to maintain proper damping and oil retention, leading to poor handling and accelerated wear on internal components. These OEM-specification replacement seals restore the hydraulic integrity of your...FS021- SKU:
- FS021
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- OUTSIDE DIAMETER METRIC:
- 52.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- INSIDE DIAMETER METRIC:
- 40.00 MM
- THICKNESS METRIC:
- 8.00 MM
- UNITS:
- PAIR
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
$12.19 -
PARTS UNLIMITED Fork Seals - 45 mm ID x 57 mm OD x 11 mm T PUP40FORK455059
PARTS UNLIMITED
$17.29Fork seals are critical wear items that directly impact your suspension's performance and longevity. Worn or leaking seals compromise damping efficiency, allow contamination into the fork oil, and can lead to costly internal damage. PARTS UNLIMITED Fork...FS035- SKU:
- FS035
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 11.00 MM
- OUTSIDE DIAMETER METRIC:
- 57.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 45.00 MM
- RIDING STYLE:
- STREET
$17.29 -
PARTS UNLIMITED Fork Seals - 46 mm ID x 58 mm OD x 10.5/11.5 mm T PUP40FORK455060
PARTS UNLIMITED
$18.31Fork seals are critical to maintaining proper suspension performance and preventing hydraulic fluid loss that compromises damping and handling. Worn or degraded seals allow oil to weep past the stanchion tubes, leading to reduced suspension...FS036- SKU:
- FS036
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- THICKNESS METRIC:
- 10.50 MM/11.50 MM
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 46.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 58.00 MM
- RIDING STYLE:
- OFF-ROAD
$18.31 -
PARTS UNLIMITED Fork Seals - 30 mm ID x 42 mm OD x 10.5 mm T PUP40FORK455013
PARTS UNLIMITED
$14.23Fork seals are critical wear items that directly impact your suspension's performance and longevity. Degraded seals allow hydraulic fluid to escape, leading to poor damping, reduced suspension travel, and potential fork damage. These OEM-specification...FS038- SKU:
- FS038
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- OUTSIDE DIAMETER METRIC:
- 42.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 30.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 10.50 MM
- UNITS:
- PAIR
$14.23 -
PARTS UNLIMITED Fork Seals - 33 mm ID x 45 mm OD x 11 mm T PUP40FORK455024
PARTS UNLIMITED
$11.17Fork seals are critical wear items that directly impact suspension performance and safety. Worn or leaking seals compromise damping action, reduce control, and can lead to costly internal fork damage. PARTS UNLIMITED Fork Seals deliver OEM-specification...FS039- SKU:
- FS039
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 11.00 MM
- INSIDE DIAMETER METRIC:
- 33.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 45.00 MM
- UNITS:
- PAIR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$11.17 -
PARTS UNLIMITED Fork Seals - 35 mm ID x 48 mm OD x 10.5 mm T PUP40FORK455031
PARTS UNLIMITED
$11.17Fork seals are critical maintenance items that prevent hydraulic fluid from leaking into your suspension's air chamber—a failure that destroys damping performance and can compromise your entire suspension geometry. These PARTS UNLIMITED replacements meet...FS040- SKU:
- FS040
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- INSIDE DIAMETER METRIC:
- 35.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 10.50 MM
- OUTSIDE DIAMETER METRIC:
- 48.00 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- PAIR
$11.17 -
PARTS UNLIMITED Fork Seals - 43 mm ID x 55 mm OD x 9.5 mm T PUP40FORK455057
PARTS UNLIMITED
$12.19Fork seals are critical wear items that directly impact suspension performance and longevity. When seals deteriorate, oil leaks compromise damping characteristics and allow contamination into the fork, accelerating internal wear. These PARTS UNLIMITED...FS041- SKU:
- FS041
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- INSIDE DIAMETER METRIC:
- 43.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 55.00 MM
- UNITS:
- PAIR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 9.50 MM
- RIDING STYLE:
- OFF-ROAD
$12.19 -
PARTS UNLIMITED Fork Seals - 43 mm ID x 54 mm OD x 9.5 mm T PUP40FORK455055
PARTS UNLIMITED
$13.21Fork seals wear down over time, allowing hydraulic fluid to leak and compromising suspension performance and safety. A fresh set of OEM-spec seals restores your fork's damping characteristics and prevents costly internal damage. These PARTS UNLIMITED...FS042- SKU:
- FS042
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- INSIDE DIAMETER METRIC:
- 43.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 54.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 9.50 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$13.21 -
MOOSE RACING Fork Seal Kit - 43 mm 56-133-1
MOOSE RACING
$37.95Fork seals degrade faster than almost any other suspension component, and worn seals cause oil leakage, reduced damping performance, and accelerated fork tube wear. The MOOSE RACING 43mm Fork Seal Kit uses a patented MAX-LIFE compound with a friction...04070319- SKU:
- 04070319
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- OUTSIDE DIAMETER METRIC:
- 54.00 MM
- PRODUCT NAME:
- FORK SEAL KIT
- THICKNESS METRIC:
- 11.00 MM
- INSIDE DIAMETER METRIC:
- 43.00 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- RIDING STYLE:
- STREET
$37.95 -
MOOSE RACING Carbon Fiber Fork Guards FG01
MOOSE RACING
$96.95Fork guards protect your bike's most vulnerable suspension components from trail debris, rocks, and crash damage—keeping your fork legs straight and your alignment true. The MOOSE RACING Carbon Fiber Fork Guards FG01 deliver that protection with genuine...04120163- SKU:
- 04120163
- Availability:
- Ships Same Business Day
- Weight:
- 0.29 LBS
- BASE COLOR:
- GRAY
- MOUNTING POSITION:
- UPPER
- BASE COLOR:
- BLACK
- COLOR/FINISH:
- GRAY
- MATERIAL:
- CARBON FIBER
- PRODUCT NAME:
- PROTECTOR
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- BLACK
- TYPE:
- FORK
- UNITS:
- PAIR
$96.95
