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
-
MOOSE RACING Fork Bushing Kit - 52.00 mm 38-6073
MOOSE RACING
$66.95Fork bushings are critical wear components that directly impact suspension responsiveness, damping consistency, and overall ride quality. OEM bushings degrade predictably, but a quality replacement kit like this MOOSE RACING option extends service life...04500208- SKU:
- 04500208
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- INNER BUSHING OUTSIDE DIAMETER IMPERIAL:
- 1.92'
- INNER BUSHING WIDTH IMPERIAL:
- 0.79'
- MATERIAL:
- PTFE
- INNER BUSHING INSIDE DIAMETER METRIC:
- 46.80 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- BUSHING KIT
- UNITS:
- KIT
$66.95Qty in Cart: 0Quantity:Price:$66.95Subtotal: -
WORKS CONNECTION Pro Launch Start Device 12-220
WORKS CONNECTION
$148.95A reliable launch device separates competitive runs from costly false starts. The WORKS CONNECTION Pro Launch Start Device eliminates the inconsistency of spring-loaded designs with a spring-less mechanism that delivers positive engagement every single...04500220- SKU:
- 04500220
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- MOUNTING POSITION:
- FRONT
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- LAUNCH CONTROL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- KIT
- MODEL:
- FOR HONDA
$148.95Qty in Cart: 0Quantity:Price:$148.95Subtotal: -
WORKS CONNECTION Pro Launch Start Device 12-222
WORKS CONNECTION
$174.95Consistent launch performance separates competitive racers from the rest of the field. The WORKS CONNECTION Pro Launch Start Device eliminates the unpredictability of spring-based designs, delivering precise, repeatable engagement every single time you...04500221- SKU:
- 04500221
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- LAUNCH CONTROL
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- KIT
- MODEL:
- FOR HONDA
$174.95 -
WORKS CONNECTION Pro Launch Start Device 12-720
WORKS CONNECTION
$164.95A reliable launch start device is critical for consistent gate performance—poor engagement or unpredictable release can cost you tenths on the track. The WORKS CONNECTION Pro Launch Start Device eliminates mechanical inconsistency with its spring-less...04500301- SKU:
- 04500301
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- MODEL:
- FOR HUSQVARNA
- PRODUCT NAME:
- LAUNCH CONTROL
$164.95 -
WORKS CONNECTION Pro Launch Start Device 12-700
WORKS CONNECTION
$164.95A reliable launch start device is the difference between consistent gate times and costly false starts. The WORKS CONNECTION Pro Launch Start Device 12-700 eliminates the unpredictability of spring-based designs with its spring-less mechanism, giving you...04500302- SKU:
- 04500302
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- COLOR/FINISH:
- BLACK
- MODEL:
- FOR HUSQVARNA
- PRODUCT NAME:
- LAUNCH CONTROL
- UNITS:
- KIT
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
$164.95 -
On Sale
WORKS CONNECTION Pro Launch Start Device 12-331
WORKS CONNECTION
MSRP: $141.95Now: $91.00Was: $141.95A reliable launch device eliminates variables on the starting line—consistency is what separates competitive times from wasted tenths. The WORKS CONNECTION Pro Launch Start Device delivers positive engagement with zero spring creep, giving you the same...04500303- SKU:
- 04500303
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- MOUNTING POSITION:
- FRONT
- MODEL:
- FOR KAWASAKI
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- KIT
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- LAUNCH CONTROL
MSRP: $141.95Now: $91.00Was: $141.95 -
WORKS CONNECTION Pro Launch Start Device 12-704
WORKS CONNECTION
$164.95A reliable start device is non-negotiable in competitive racing—inconsistent engagement costs you races. The WORKS CONNECTION Pro Launch Start Device eliminates the variables that come with traditional spring-loaded designs, giving you repeatable,...04500332- SKU:
- 04500332
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- MODEL:
- FOR HUSQVARNA
- PRODUCT NAME:
- LAUNCH CONTROL
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- FRONT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- KIT
$164.95 -
On Sale
WORKS CONNECTION Pro Launch Start Device 12-721
WORKS CONNECTION
MSRP: $141.95Now: $91.00Was: $141.95A reliable launch control system separates consistent race starts from costly mistakes on the line. The WORKS CONNECTION Pro Launch Start Device eliminates mechanical inconsistency with its spring-less design, giving you the repeatable engagement and...04500470- SKU:
- 04500470
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $141.95Now: $91.00Was: $141.95 -
WORKS CONNECTION Pro Launch Start Device 12-410
WORKS CONNECTION
$164.95A reliable launch device eliminates variables from your start sequence—giving you consistent, repeatable performance off the line every single time. The WORKS CONNECTION Pro eliminates the complexity of spring-based designs with a positive-engagement...04500485- SKU:
- 04500485
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- KIT
- MODEL:
- FOR YAMAHA
- MOUNTING POSITION:
- FRONT
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- LAUNCH CONTROL
$164.95 -
On Sale
WORKS CONNECTION Pro Launch Start Device 12-810
WORKS CONNECTION
MSRP: $141.95Now: $91.00Was: $141.95A reliable launch device can mean the difference between consistent race results and costly mistakes. The WORKS CONNECTION Pro Launch Start Device eliminates the variables that come with traditional spring-based designs, giving you repeatable engagement...04500581- SKU:
- 04500581
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- RED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- LAUNCH CONTROL
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
MSRP: $141.95Now: $91.00Was: $141.95Qty in Cart: 0Quantity:Price:MSRP: $141.95Now: $91.00Was: $141.95Subtotal: -
PARTS UNLIMITED Fork Seals - 41 mm ID x 53 mm OD x 8/9.5 mm T PUP40FORK455052
PARTS UNLIMITED
$11.95Worn fork seals allow hydraulic fluid to escape, compromising damping performance and risking suspension damage. These PARTS UNLIMITED fork seals are manufactured to OEM specifications, ensuring proper fluid retention and consistent suspension response...FS022- SKU:
- FS022
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- STREET
- INSIDE DIAMETER METRIC:
- 41.00 MM
- OUTSIDE DIAMETER METRIC:
- 53.00 MM
- THICKNESS METRIC:
- 8.00 MM/9.50 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$11.95 -
PARTS UNLIMITED Fork Seals - 35 mm ID x 48 mm OD x 11 mm T - NOK PUP40FORK455135
PARTS UNLIMITED
$16.95Fork seals are critical to suspension performance—they prevent hydraulic fluid loss while keeping dirt and moisture out of your fork tubes. Worn or leaking seals compromise damping consistency, reduce ride quality, and accelerate internal component wear...04070264- SKU:
- 04070264
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- MATERIAL:
- NOK ANTI-STICTION
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- PRODUCT NAME:
- FORK SEAL
- INSIDE DIAMETER METRIC:
- 35.00 MM
- OUTSIDE DIAMETER METRIC:
- 48.00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 11.00 MM
$16.95 -
PARTS UNLIMITED Fork Seals - 49 mm ID x 60 mm OD x 11 mm T PUP40FORK455073
PARTS UNLIMITED
$23.95Fork seals are critical wear items that directly impact suspension performance and longevity. When seals degrade, hydraulic fluid leaks past the seal, reducing damping effectiveness and allowing contaminants into your fork internals—a scenario that leads...FS046- SKU:
- FS046
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- NOK ANTI-STICTION
- OUTSIDE DIAMETER METRIC:
- 60.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 49.00 MM
- THICKNESS METRIC:
- 11.00 MM
- RIDING STYLE:
- STREET
$23.95 -
PARTS UNLIMITED Fork Seals - 41 mm ID x 54 mm OD x 11 mm T PUP40FORK455054
PARTS UNLIMITED
$12.95Fork seal degradation is one of the most common causes of suspension performance loss and costly oil leakage onto your brakes. The PARTS UNLIMITED Fork Seals deliver OEM-equivalent construction at a fraction of the replacement cost, restoring your...FS023- SKU:
- FS023
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- OUTSIDE DIAMETER METRIC:
- 54.00 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS METRIC:
- 11.00 MM
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 41.00 MM
$12.95 -
PARTS UNLIMITED Fork Seals - 36 mm ID x 48.5 mm OD x 14 mm T PUP40FORK455118
PARTS UNLIMITED
$40.95Fork seals are critical wear items that directly impact your suspension's performance and longevity. Worn or leaking seals compromise damping efficiency, reduce fork oil retention, and can lead to accelerated internal wear—all of which degrade handling...04070037- SKU:
- 04070037
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- FORK SEAL
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 36.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 14.00 MM
$40.95 -
PARTS UNLIMITED Fork Seals - 46 mm ID x 58.5 mm OD x 11.6 mm/BR5478I T PUP40FORK455120
PARTS UNLIMITED
$86.95Fork seals are critical to suspension performance—they prevent hydraulic fluid from leaking into the fork tubes while maintaining proper damping characteristics. Over time, worn seals allow oil to escape, leading to poor suspension response, increased...04070038- SKU:
- 04070038
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 11.60 MM
- OUTSIDE DIAMETER METRIC:
- 58.50 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- INSIDE DIAMETER METRIC:
- 46.00 MM
- MATERIAL:
- RUBBER
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
$86.95 -
PARTS UNLIMITED Fork Seals - 48 mm ID x 58 mm OD x 8.5/10 mm T PUP40FORK455200
PARTS UNLIMITED
$19.95Fork seals are critical wear items that directly impact your suspension's performance and longevity. When seals degrade, fork oil leaks out, compromising damping characteristics and allowing contaminants into the internals—leading to fork failure and...04070330- SKU:
- 04070330
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- THICKNESS METRIC:
- 8.50 MM/10.00 MM
- INSIDE DIAMETER METRIC:
- 48.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 58.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
$19.95 -
PARTS UNLIMITED Fork Seals - 35 mm ID x 47 mm OD x 10 mm T PUP40FORK455169
PARTS UNLIMITED
$16.95Fork seals are critical wear items that directly impact your suspension's performance and longevity. Worn or leaking seals allow hydraulic fluid to escape, compromising damping characteristics and leaving your forks vulnerable to internal corrosion...04070331- SKU:
- 04070331
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 10.00 MM
- INSIDE DIAMETER METRIC:
- 35.00 MM
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER METRIC:
- 47.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- PAIR
$16.95 -
PARTS UNLIMITED Fork Seals - 35 mm ID x 47.4 mm OD x 4.6/14 mm T PUP40FORK455182
PARTS UNLIMITED
$54.95Fork seal degradation compromises suspension performance and accelerates internal damage to your fork tubes—a situation that's both costly and dangerous. PARTS UNLIMITED Fork Seals are engineered to OEM specifications, delivering the hydraulic integrity...04070332- SKU:
- 04070332
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- THICKNESS METRIC:
- 4.60 MM/14.00 MM
- PRODUCT NAME:
- FORK SEAL
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- PAIR
- INSIDE DIAMETER METRIC:
- 35.00 MM
- MATERIAL:
- RUBBER
- OUTSIDE DIAMETER METRIC:
- 47.40 MM
- RIDING STYLE:
- OFF-ROAD
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
PARTS UNLIMITED Fork Seals - 45.5 mm ID x 62 mm OD x 7.5/10 mm T PUP40FORK455201
PARTS UNLIMITED
$29.95Fork seals are critical wear items that directly impact suspension performance and safety—degraded seals allow hydraulic fluid to leak, compromising damping characteristics and fork responsiveness. These PARTS UNLIMITED seals are manufactured to OEM...04070333- SKU:
- 04070333
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- FORK SEAL
- MATERIAL:
- RUBBER
- RIDING STYLE:
- OFF-ROAD
- INSIDE DIAMETER METRIC:
- 45.50 MM
- OUTSIDE DIAMETER METRIC:
- 62.00 MM
- THICKNESS METRIC:
- 7.50 MM/10.00 MM
- UNITS:
- PAIR
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$29.95
