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
-
RACE TECH Fork Springs - 0.44 kg/mm FRSP 444544
RACE TECH
$149.99Precision fork tuning demands springs that deliver consistent performance without adding unnecessary weight to your chassis. The RACE TECH 0.44 kg/mm fork springs are engineered with shot-peened, heat-treated chrome silicon steel to maintain exact spring...04050150- SKU:
- 04050150
- Availability:
- Ships Same Business Day
- Weight:
- 2.93 LBS
- LENGTH IMPERIAL:
- 17.91'
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 44.00 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- SPRING RATE IMPERIAL:
- 24.60 LB/IN
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Fork Springs - 0.46 kg/mm FRSP 444546
RACE TECH
$149.99Precision fork tuning demands springs engineered to exact specifications, and the RACE TECH 0.46 kg/mm delivers the stiffness control you need without adding unnecessary weight. Whether you're dialing in suspension geometry for track work or fine-tuning...04050151- SKU:
- 04050151
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- OUTSIDE DIAMETER METRIC:
- 44.00 MM
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 25.80 LB/IN
- LENGTH IMPERIAL:
- 17.91'
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
$149.99 -
RACE TECH Fork Springs - 0.50 kg/mm FRSP 444550
RACE TECH
$149.99Precision fork tuning demands springs that deliver consistent, predictable performance lap after lap. The RACE TECH 0.50 kg/mm fork springs combine shot-peened chrome silicon steel with heat treatment to achieve a stiffness-to-mass ratio that minimizes...04050153- SKU:
- 04050153
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
- OUTSIDE DIAMETER METRIC:
- 44.00 MM
- LENGTH IMPERIAL:
- 17.91'
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
- SPRING RATE IMPERIAL:
- 28.00 LB/IN
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Fork Springs - 0.52 kg/mm FRSP 444552
RACE TECH
$149.99Precision fork tuning demands springs engineered to exact specifications, and RACE TECH delivers that consistency with ±2% rate accuracy. These 0.52 kg/mm springs combine shot-peened, heat-treated chrome silicon steel with a high stiffness-to-mass ratio,...04050154- SKU:
- 04050154
- Availability:
- Ships Same Business Day
- Weight:
- 2.75 LBS
- LENGTH IMPERIAL:
- 17.91'
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- SPRING RATE IMPERIAL:
- 29.10 LB/IN
- OUTSIDE DIAMETER METRIC:
- 44.00 MM
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- PAIR
$149.99 -
RACE TECH Fork Springs - 0.52 kg/mm FRSP 434952
RACE TECH
$149.99Precision suspension tuning demands spring rates you can actually rely on. The RACE TECH Fork Springs deliver a 0.52 kg/mm rate with accuracy to within 2%, giving you the consistency needed for repeatable setup and predictable handling across multiple...04050156- SKU:
- 04050156
- Availability:
- Ships Same Business Day
- Weight:
- 3.15 LBS
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 29.10 LB/IN
- OUTSIDE DIAMETER METRIC:
- 42.70 MM
- UNITS:
- PAIR
- LENGTH IMPERIAL:
- 19.41'
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
$149.99 -
RACE TECH Fork Springs - 0.46 kg/mm FRSP 444746
RACE TECH
$149.99Precision fork tuning demands springs that deliver consistent performance lap after lap without deflection or fatigue. The RACE TECH 0.46 kg/mm fork springs combine shot-peened chromium silicon steel with heat treatment to achieve the stiffness-to-mass...04050097- SKU:
- 04050097
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- OUTSIDE DIAMETER METRIC:
- 43.60 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 25.80 LB/IN
- UNITS:
- PAIR
- LENGTH IMPERIAL:
- 18.58'
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Fork Springs - 0.54 kg/mm FRSP 444754
RACE TECH
$149.99Fork spring performance directly impacts your suspension's responsiveness, bottoming resistance, and overall chassis control. The RACE TECH 0.54 kg/mm springs deliver the precise spring rate needed for consistent lap times, whether you're dialing in a...04050101- SKU:
- 04050101
- Availability:
- Ships Same Business Day
- Weight:
- 3.10 LBS
- PRODUCT NAME:
- SPRING KIT
- LENGTH IMPERIAL:
- 18.58'
- SPRING RATE IMPERIAL:
- 30.20 LB/IN
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 43.60 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
$149.99 -
RACE TECH Fork Springs - 0.40 kg/mm FRSP 434640
RACE TECH
$149.99Front-end geometry and ride quality depend entirely on consistent spring rates, and any variance throws off your suspension tuning across the entire range. The RACE TECH Fork Springs deliver rate accuracy within 2% through precision heat-treatment and...04050024- SKU:
- 04050024
- Availability:
- Ships Same Business Day
- Weight:
- 2.71 LBS
- RIDING STYLE:
- OFF-ROAD
- SPRING RATE IMPERIAL:
- 22.40 LB/IN
- TYPE:
- FORK
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 43.50 MM
- PRODUCT NAME:
- SPRING KIT
- LENGTH IMPERIAL:
- 18.15'
$149.99 -
RACE TECH Fork Springs - 0.48 kg/mm FRSP 434648
RACE TECH
$149.99Precision fork control directly impacts your lap times and rider confidence—especially in high-speed corners and aggressive braking zones. RACE TECH Fork Springs deliver consistent, predictable damping characteristics that keep your suspension working at...04050028- SKU:
- 04050028
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- OUTSIDE DIAMETER METRIC:
- 43.50 MM
- SPRING RATE IMPERIAL:
- 26.90 LB/IN
- LENGTH IMPERIAL:
- 18.15'
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
$149.99 -
RACE TECH Fork Springs - 0.38 kg/mm FRSP 444838
RACE TECH
$149.99Precision fork control starts with the right spring rate, and the RACE TECH 0.38 kg/mm fork springs deliver the consistency your suspension demands. Whether you're dialing in front-end geometry on a track or fine-tuning your bike's handling for canyon...04050029- SKU:
- 04050029
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- SPRING RATE IMPERIAL:
- 21.30 LB/IN
- LENGTH IMPERIAL:
- 18.90'
- OUTSIDE DIAMETER METRIC:
- 43.60 MM
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Gold Valve Cartridge Fork Emulators for Damping Rod Forks - 41 mm FEGV 4101
RACE TECH
$199.99Damping rod forks limit your tuning options and performance potential—especially if you're pushing harder on the track or trail. The RACE TECH Gold Valve Cartridge Fork Emulators transform your existing fork into a responsive, adjustable suspension...FEGV4101- SKU:
- FEGV4101
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- COLOR/FINISH:
- GOLD
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- GOLD VALVE
- PRODUCT NAME:
- CARTRIDGE EMULATOR
- OUTSIDE DIAMETER IMPERIAL:
- 1.61'
- TYPE:
- FORK
- UNITS:
- KIT
$199.99 -
RACE TECH Gold Valve Cartridge Fork Emulators for Damping Rod Forks FEGV 3301
RACE TECH
$199.99Stock damping rod forks limit your suspension's potential, forcing you to choose between comfort and control. The RACE TECH Gold Valve Cartridge Fork Emulators transform your existing fork internals into a responsive, tunable system that rivals dedicated...FEGV3301- SKU:
- FEGV3301
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- TYPE:
- FORK
- PRODUCT NAME:
- CARTRIDGE EMULATOR
- COLOR/FINISH:
- GOLD
- OUTSIDE DIAMETER IMPERIAL:
- 0.94'
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- GOLD VALVE
$199.99 -
RACE TECH Super Slick Inner Fork Bushing - 47 mm X 20 mm W x 1 mm T FMBI 47201 P
RACE TECH
$31.95Suspension performance hinges on reducing friction at every contact point—and fork bushings are critical. The RACE TECH Super Slick Inner Fork Bushing delivers measurably lower friction than standard options, translating to more responsive fork action...FMBI47201P- SKU:
- FMBI47201P
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- THICKNESS METRIC:
- 1.00 MM
- UNITS:
- PAIR
- FOR FORK TUBE DIAMETER METRIC:
- 47.00 MM
- INNER BUSHING WIDTH METRIC:
- 20.00 MM
- MOUNTING POSITION:
- INNER
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- MODEL:
- SUPER SLICK
- PRODUCT NAME:
- BUSHING KIT
$31.95 -
RACE TECH Fork Springs - 0.32 kg/mm FRSP 324532
RACE TECH
$149.99Suspension geometry demands precision, and your fork springs are no exception. RACE TECH Fork Springs deliver repeatability within 2% accuracy—essential for dialing in consistent front-end feel across practice sessions and race runs. Built from...FRSP324532- SKU:
- FRSP324532
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- OUTSIDE DIAMETER METRIC:
- 32.60 MM
- PRODUCT NAME:
- SPRING KIT
- LENGTH IMPERIAL:
- 17.56'
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
- SPRING RATE IMPERIAL:
- 17.90 LB/IN
- TYPE:
- FORK
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Fork Springs - 0.46 kg/mm FRSP 364746
RACE TECH
$149.99Fork springs are critical to suspension performance—they directly control your bike's ability to absorb impacts, maintain chassis geometry, and transfer power to the track. The RACE TECH 0.46 kg/mm spring delivers the precision stiffness you need for...FRSP364746- SKU:
- FRSP364746
- Availability:
- Ships Same Business Day
- Weight:
- 2.88 LBS
- LENGTH IMPERIAL:
- 18.58'
- PRODUCT NAME:
- SPRING KIT
- OUTSIDE DIAMETER METRIC:
- 35.80 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
- SPRING RATE IMPERIAL:
- 25.80 LB/IN
$149.99 -
RACE TECH Fork Springs - 0.46 kg/mm FRSP 375046
RACE TECH
$149.99Precision fork performance demands springs engineered to exact specifications—and RACE TECH delivers. These 0.46 kg/mm springs combine shot-peened, heat-treated chrome silicon steel with a stiffness-to-mass ratio that translates to responsive front-end...FRSP375046- SKU:
- FRSP375046
- Availability:
- Ships Same Business Day
- Weight:
- 2.95 LBS
- OUTSIDE DIAMETER METRIC:
- 36.80 MM
- LENGTH IMPERIAL:
- 18.58'
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- PAIR
- SPRING RATE IMPERIAL:
- 25.80 LB/IN
- TYPE:
- FORK
$149.99 -
RACE TECH Fork Springs - 0.50 kg/mm FRSP 395150
RACE TECH
$149.99Precision fork tuning demands springs engineered to exact specifications—and the RACE TECH 0.50 kg/mm fork springs deliver repeatability that separates competitive setups from guesswork. With heat-treated chrome silicon construction and shot-peening for...FRSP395150- SKU:
- FRSP395150
- Availability:
- Ships Same Business Day
- Weight:
- 3.00 LBS
- SPRING RATE IMPERIAL:
- 28.00 LB/IN
- LENGTH IMPERIAL:
- 20.16'
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
- PRODUCT NAME:
- SPRING KIT
- OUTSIDE DIAMETER METRIC:
- 41.20 MM
$149.99 -
RACE TECH Fork Springs - 0.47 kg/mm FRSP 405147
RACE TECH
$149.99Precision fork tuning demands springs engineered to exact specifications, and the RACE TECH 0.47 kg/mm fork springs deliver the consistency your suspension setup requires. Shot-peened chrome silicon steel and heat treatment ensure reliability through...FRSP405147- SKU:
- FRSP405147
- Availability:
- Ships Same Business Day
- Weight:
- 3.25 LBS
- LENGTH IMPERIAL:
- 20.00'
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
- OUTSIDE DIAMETER METRIC:
- 39.50 MM
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 26.30 LB/IN
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Fork Springs - 0.49 kg/mm FRSP 405149
RACE TECH
$149.99Precision fork tuning demands springs that deliver exact rate consistency lap after lap. The RACE TECH 0.49 kg/mm fork springs eliminate guesswork with shot-peened, heat-treated chrome silicon steel that maintains accuracy within 2%—critical for...FRSP405149- SKU:
- FRSP405149
- Availability:
- Ships Same Business Day
- Weight:
- 3.12 LBS
- LENGTH IMPERIAL:
- 20.00'
- OUTSIDE DIAMETER METRIC:
- 39.50 MM
- RIDING STYLE:
- OFF-ROAD
- SPRING RATE IMPERIAL:
- 27.40 LB/IN
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- UNITS:
- PAIR
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal: -
RACE TECH Fork Springs - 0.42 kg/mm FRSP 414642
RACE TECH
$149.99Precise fork spring rates are non-negotiable in racing—even minor inconsistencies compromise handling and lap times. RACE TECH's 0.42 kg/mm springs deliver accurate, repeatable performance with a high stiffness-to-mass ratio that minimizes unsprung...FRSP414642- SKU:
- FRSP414642
- Availability:
- Ships Same Business Day
- Weight:
- 2.81 LBS
- SPRING RATE IMPERIAL:
- 23.50 LB/IN
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
- LENGTH IMPERIAL:
- 18.19'
- OUTSIDE DIAMETER METRIC:
- 41.20 MM
$149.99Qty in Cart: 0Quantity:Price:$149.99Subtotal:
