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
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FACTORY CONNECTION Front Fork Springs - 0.46 kg/mm LRA-046
FACTORY CONNECTION
$159.95Precise suspension tuning demands fork springs engineered to exacting standards—and FACTORY CONNECTION delivers exactly that. These 0.46 kg/mm LRA springs are cold-wound on CNC equipment and heat-tempered for consistent performance lap after lap. Whether...04050167- SKU:
- 04050167
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 25.80 LB/IN
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
$159.95 -
FACTORY CONNECTION Front Fork Springs - 0.48 kg/mm LRA-048
FACTORY CONNECTION
$159.95Precise suspension geometry demands fork springs that deliver consistent performance lap after lap—and Factory Connection's 0.48 kg/mm springs are engineered to do exactly that. Built with CNC-wound precision and heat-tempered for durability, these...04050168- SKU:
- 04050168
- Availability:
- Ships Same Business Day
- Weight:
- 2.61 LBS
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- SPRING RATE IMPERIAL:
- 26.90 LB/IN
- UNITS:
- PAIR
$159.95 -
FACTORY CONNECTION Front Fork Springs - 0.50 kg/mm LRA-050
FACTORY CONNECTION
$159.95Front fork springs are critical to suspension geometry and handling precision—incorrect rates lead to poor damping, inconsistent bottoming, and compromised cornering performance. The FACTORY CONNECTION LRA-050 delivers repeatable, fatigue-resistant...04050169- SKU:
- 04050169
- Availability:
- Ships Same Business Day
- Weight:
- 2.94 LBS
- SPRING RATE IMPERIAL:
- 28.00 LB/IN
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
$159.95 -
FACTORY CONNECTION Fork Pressure Springs - 1.70 kg/mm PRESSSPG1.7K06
FACTORY CONNECTION
$55.00If you're running stock fork springs, you're likely sacrificing comfort and feedback on technical terrain. FACTORY CONNECTION Fork Pressure Springs deliver the compliance you need for small-bump sensitivity without compromising mid-stroke...04050171- SKU:
- 04050171
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- PRODUCT NAME:
- PRESSURE SPRING SET
- SPRING RATE IMPERIAL:
- 95.20 LB/IN
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- UNITS:
- PAIR
$55.00 -
FACTORY CONNECTION Front Fork Springs - 0.49 kg/mm LSU-049
FACTORY CONNECTION
$159.95Factory Connection front fork springs deliver predictable, consistent performance across repeated compression cycles—essential for maintaining suspension geometry during aggressive riding and racing. Precision manufacturing and heat treatment ensure...04050196- SKU:
- 04050196
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
- RIDING STYLE:
- OFF-ROAD
- SPRING RATE IMPERIAL:
- 27.40 LB/IN
- TYPE:
- FORK
- UNITS:
- PAIR
- PRODUCT NAME:
- SPRING KIT
$159.95 -
FACTORY CONNECTION Front Fork Springs - 0.52 kg/mm LSA-052
FACTORY CONNECTION
$159.95Factory Connection front fork springs deliver the precision and durability demanded by serious racers and high-performance riders. Cold-wound on CNC equipment and heat-tempered for fatigue resistance, these springs maintain consistent rates lap after...04050255- SKU:
- 04050255
- Availability:
- Ships Same Business Day
- Weight:
- 3.06 LBS
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 29.10 LB/IN
$159.95Qty in Cart: 0Quantity:Price:$159.95Subtotal: -
FACTORY CONNECTION Fork Pressure Springs - 1.42 kg/mm PRESSSPG1.42-08
FACTORY CONNECTION
$55.00If you're spending half your ride fighting harsh fork feedback on technical terrain, you're wasting energy that should go into lines and throttle control. The FACTORY CONNECTION Fork Pressure Springs at 1.42 kg/mm deliver a noticeably lighter action that...04050258- SKU:
- 04050258
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- PRESSURE SPRING SET
- UNITS:
- PAIR
- SPRING RATE IMPERIAL:
- 79.52 LB/IN
$55.00 -
FACTORY CONNECTION Fork Pressure Springs - 1.61 kg/mm PRESSSPG1.61-08
FACTORY CONNECTION
$55.00If you're spending hours on technical terrain and your fork action feels harsh over small irregularities, you're losing both comfort and control—two things that directly impact your lap times and riding longevity. The FACTORY CONNECTION 1.61 kg/mm Fork...04050271- SKU:
- 04050271
- Availability:
- Ships Same Business Day
- Weight:
- 0.34 LBS
- PRODUCT NAME:
- PRESSURE SPRING SET
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
- SPRING RATE IMPERIAL:
- 90.16 LB/IN
- TYPE:
- FORK
$55.00 -
FACTORY CONNECTION Fork Pressure Springs - 1.76 kg/mm PRESSSPG1.76-08
FACTORY CONNECTION
$55.00If you're running harsh, stiff fork springs that punish you on every small bump and square-edge braking impact, you're fighting your bike instead of riding it. The FACTORY CONNECTION 1.76 kg/mm Fork Pressure Springs deliver a lighter, more compliant...04050272- SKU:
- 04050272
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- PRESSURE SPRING SET
- SPRING RATE IMPERIAL:
- 98.56 LB/IN
- UNITS:
- PAIR
$55.00 -
On Sale
FACTORY CONNECTION Front Fork Springs - 0.46 kg/mm LLS-046
FACTORY CONNECTION
MSRP: $149.99Now: $102.00Was: $149.99Front fork springs are critical to your suspension's ability to maintain consistent ride height, support, and handling under load. The Factory Connection LLS-046 delivers precisely calibrated spring rate and fatigue-resistant construction, ensuring your...04050279- SKU:
- 04050279
- Availability:
- Ships Same Business Day
- Weight:
- 2.62 LBS
- UNITS:
- PAIR
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 25.80 LB/IN
MSRP: $149.99Now: $102.00Was: $149.99 -
On Sale
FACTORY CONNECTION Front Fork Springs - 0.88 kg/mm LRV-088
FACTORY CONNECTION
MSRP: $109.99Now: $77.00Was: $109.99Factory Connection front fork springs deliver precise, consistent performance across every riding condition by maintaining accurate spring rates that refuse to drift over time. Whether you're fine-tuning suspension geometry on a championship-winning...04050319- SKU:
- 04050319
- Availability:
- Ships Same Business Day
- Weight:
- 2.50 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 49.80 LB/IN
- UNITS:
- EACH
MSRP: $109.99Now: $77.00Was: $109.99 -
FACTORY CONNECTION Front Fork Springs - 0.92 kg/mm LRV-092
FACTORY CONNECTION
$119.95Front fork springs are fundamental to your suspension's responsiveness and handling precision—and cheap springs will rob you of both. The FACTORY CONNECTION LRV-092 delivers the consistent spring rate and durability demanded by serious riders and racers...04050320- SKU:
- 04050320
- Availability:
- Ships Same Business Day
- Weight:
- 2.93 LBS
- SPRING RATE IMPERIAL:
- 51.50 LB/IN
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$119.95 -
FACTORY CONNECTION Front Fork Springs - 0.45 kg/mm LRN-045
FACTORY CONNECTION
$159.95Factory Connection front fork springs deliver the precision and durability demanded by serious racers and suspension tuners. Cold-wound on CNC equipment with heat-tempering and shot-peening, these springs maintain consistent rates through thousands of...04050823- SKU:
- 04050823
- Availability:
- Ships Same Business Day
- Weight:
- 2.91 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
- PRODUCT NAME:
- SPRING KIT
- SPRING RATE IMPERIAL:
- 25.20 LB/IN
- UNITS:
- PAIR
$159.95 -
MOOSE RACING Fork Bushing Kit - 47.00 mm 38-6063
MOOSE RACING
$57.95Fork bushings wear faster than any other suspension component, directly impacting your bike's handling precision and damping response. This MOOSE RACING kit replaces worn bushings with dyno-tested components that outlast OEM parts by a significant...04500144- SKU:
- 04500144
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- INNER BUSHING INSIDE DIAMETER METRIC:
- 41.90 MM
- UNITS:
- KIT
- PRODUCT NAME:
- BUSHING KIT
- INNER BUSHING WIDTH IMPERIAL:
- 0.79'
- INNER BUSHING OUTSIDE DIAMETER IMPERIAL:
- 1.72'
- MATERIAL:
- PTFE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- FORK
$57.95 -
UFO Fork Tube Protectors - White - RM - '99-'03 SU03905041
UFO
$29.95Fork tube protectors shield your suspension from debris, UV damage, and minor impacts that accumulate during aggressive riding and track use. These white protectors maintain the factory appearance of your RM while extending the service life of your fork...1271229- SKU:
- 1271229
- Availability:
- Ships Same Business Day
- Weight:
- 0.81 LBS
$29.95 -
SDI Free Piston Assembly SDEFFPA-SFF
SDI
$62.95Stock plastic pistons are a known weak point in high-demand applications—they flex under pressure, wear prematurely, and can fail catastrophically when you need reliability most. The SDI Free Piston Assembly SDEFFPA-SFF replaces that liability with a...04500596- SKU:
- 04500596
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$62.95Qty in Cart: 0Quantity:Price:$62.95Subtotal: -
SDI Fork Preload Spacer - 2.5 mm SDEFSP25-25
SDI
$6.95Fine-tuning your suspension geometry shouldn't require a complete fork disassembly. The SDI Fork Preload Spacer delivers precise 2.5 mm preload adjustment on twin-chamber forks with a simple bolt-on installation, giving you repeatable, predictable...04500606- SKU:
- 04500606
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$6.95Qty in Cart: 0Quantity:Price:$6.95Subtotal: -
SDI DU Piston Bushing Conversion Kit - 46 mm DRPBK-KYB46
SDI
$19.95Stock piston rings wear significantly within the first five hours of use, leading to degraded damping performance and increased friction. The SDI DU Piston Bushing Conversion Kit replaces your wear band with a low-friction design that maintains...04500614- SKU:
- 04500614
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$19.95Qty in Cart: 0Quantity:Price:$19.95Subtotal: -
SDI Fork Service Kit - 49 mm SFSK49
SDI
$83.95Proper fork maintenance is critical to maintaining responsive handling, consistent damping performance, and extending the life of your suspension. The SDI Fork Service Kit for 49 mm forks provides all necessary components in one package, eliminating the...04500631- SKU:
- 04500631
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$83.95Qty in Cart: 0Quantity:Price:$83.95Subtotal: -
SDI Fork Service Kit - 35 mm WFSK35-SKF
SDI
$99.95Proper fork maintenance is essential to maintaining your suspension's responsiveness, damping characteristics, and longevity. This comprehensive service kit contains every seal, fluid, and component you need to refresh your 35mm forks without sourcing...04500633- SKU:
- 04500633
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$99.95Qty in Cart: 0Quantity:Price:$99.95Subtotal:
