Dirt Bike
Browse over 50,000+ off-roading dirt bike parts and gear ready to be delivered to your doorstep. We offer riding gear & apparel at great prices. Along with parts and tools you need to keep the bike on the track or trails. Shop the biggest names in the motocross industry from Renthal, Dunlop, Thor, Maxima, Pro Circuit, Bill's Pipes, FMF, Excel and so many more. From dirt bike engine parts to new clutches we have what you need to stay one step ahead of your competition. Have a fitment question? reach out to our phone line at (231) 767-5055
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On Sale
PROX Piston Kit - 75.96 mm - Sherco 250SE-F/250SEF-R 01.7314.A
PROX
MSRP: $209.99Now: $178.00Was: $209.99Your Sherco 250SE engine demands precision components that match OEM specifications without compromise. This PROX piston kit delivers CNC-machined accuracy and OEM-spec rings in a complete assembly, eliminating the guesswork of sourcing individual...09106799- SKU:
- 09106799
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $209.99Now: $178.00Was: $209.99 -
On Sale
PROX Piston Kit - 83.95 mm - Sherco 300SE-F/300SEF-R 01.7324.A
PROX
MSRP: $221.95Now: $178.00Was: $221.95Your Sherco 300SE-F/300SEF-R demands precision internals that can withstand the demands of high-RPM racing and aggressive trail riding. This PROX piston kit delivers OEM-quality components engineered to exact specifications, ensuring reliable power...09106800- SKU:
- 09106800
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
MSRP: $221.95Now: $178.00Was: $221.95 -
On Sale
PROX Piston Kit - 66.34 mm - Sherco 250SE/250SE-R 01.7334.A
PROX
MSRP: $166.95Now: $136.00Was: $166.95When your Sherco 250SE/250SE-R's piston begins to show wear, power delivery suffers and reliability becomes uncertain. This PROX piston kit restores your engine to OEM performance standards with precision-engineered components built to withstand the...09106801- SKU:
- 09106801
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
MSRP: $166.95Now: $136.00Was: $166.95 -
On Sale
PROX Piston Kit - 66.34 mm - Sherco 250SE/250SE-R 01.7337.A
PROX
MSRP: $166.95Now: $136.00Was: $166.95When your Sherco 250SE or 250SE-R piston shows wear, compression loss and power degradation follow. This PROX piston kit restores factory performance and reliability with precision engineering, giving you the responsiveness and durability you need...09106802- SKU:
- 09106802
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $166.95Now: $136.00Was: $166.95 -
On Sale
PROX Piston Kit - 71.94 mm - Sherco 300SE/300SE-R 01.7346.A
PROX
MSRP: $221.95Now: $170.00Was: $221.95A worn or damaged piston directly compromises combustion efficiency, power delivery, and engine longevity in your Sherco 300SE/300SE-R. This PROX piston kit restores factory performance with precision-engineered components that meet or exceed OEM...09106803- SKU:
- 09106803
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
MSRP: $221.95Now: $170.00Was: $221.95 -
On Sale
PROX Piston Kit - 87.96 mm - Beta 350RR 01.7351.A
PROX
MSRP: $221.95Now: $178.00Was: $221.95Engine wear compromises power delivery and reliability—a quality piston kit restores your Beta 350RR to factory specifications and beyond. This PROX kit delivers OEM-grade precision with a complete assembly, eliminating guesswork and potential fitment...09106804- SKU:
- 09106804
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
MSRP: $221.95Now: $178.00Was: $221.95 -
On Sale
PROX Piston Kit - 87.96 mm - Beta 350RR 01.7355.A
PROX
MSRP: $221.95Now: $178.00Was: $221.95When your Beta 350RR demands peak performance, a worn or suboptimal piston compromises both power delivery and engine longevity. The PROX Piston Kit delivers precision-engineered components that restore—or exceed—OEM efficiency while maintaining the...09106805- SKU:
- 09106805
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
MSRP: $221.95Now: $178.00Was: $221.95 -
On Sale
PROX Piston Kit - 87.96 mm - Beta 390RR 01.7365.A
PROX
MSRP: $221.95Now: $183.00Was: $221.95A piston kit is the heart of your engine's combustion cycle—worn or damaged pistons directly compromise compression, power output, and engine longevity. The PROX 87.96 mm kit for the Beta 390RR delivers OEM-quality components engineered to exact...09106806- SKU:
- 09106806
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
MSRP: $221.95Now: $183.00Was: $221.95 -
On Sale
PROX Piston Kit - 94.95 mm - Beta 400RR 01.7411.A
PROX
MSRP: $216.95Now: $183.00Was: $216.95A worn or damaged piston directly compromises engine compression, throttle response, and reliability—especially critical in a high-revving 400cc dirt bike where every fraction of performance matters. The PROX Piston Kit delivers OEM-grade precision at...09106808- SKU:
- 09106808
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
MSRP: $216.95Now: $183.00Was: $216.95 -
On Sale
PROX Piston Kit - 94.95 mm - Beta 450RR 01.7412.A
PROX
MSRP: $221.95Now: $183.00Was: $221.95Your Beta 450RR's engine demands precision at every combustion cycle—and that starts with a piston kit engineered to exact OEM specifications. The PROX 94.95 mm kit delivers the durability and reliability you need for consistent power delivery, whether...09106809- SKU:
- 09106809
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
MSRP: $221.95Now: $183.00Was: $221.95 -
On Sale
PROX Piston Kit - 94.96 mm - Beta 430RR 01.7415.A
PROX
MSRP: $216.95Now: $183.00Was: $216.95A worn or damaged piston directly compromises engine compression, throttle response, and overall reliability—especially critical in high-performance 430RR applications where precision tolerances are non-negotiable. This PROX Piston Kit delivers...09106811- SKU:
- 09106811
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $216.95Now: $183.00Was: $216.95 -
On Sale
PROX Piston Kit - 99.96 mm - Beta 480RR 01.7425.A
PROX
MSRP: $221.95Now: $183.00Was: $221.95A worn or damaged piston directly impacts engine compression, throttle response, and reliability—especially critical in high-revving two-stroke applications like the Beta 480RR. This PROX piston kit delivers OEM-quality precision with a complete...09106812- SKU:
- 09106812
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
MSRP: $221.95Now: $183.00Was: $221.95 -
On Sale
PROX Piston Kit - 99.95 mm - Beta 498RR/520RR 01.7512.A
PROX
MSRP: $221.95Now: $183.00Was: $221.95The piston is the heart of your engine's combustion cycle, and worn or damaged pistons will kill performance and reliability. This PROX kit gives you OEM-quality components precision-engineered for your Beta 498RR/520RR, ensuring proper ring sealing,...09106813- SKU:
- 09106813
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
MSRP: $221.95Now: $183.00Was: $221.95 -
On Sale
PROX Inner Clutch Hub - CRF250R/RX 18.1348
PROX
MSRP: $93.95Now: $76.00Was: $93.95The inner clutch hub is a critical wear component that directly impacts your CRF250R/RX's power delivery and throttle response. A worn or damaged hub causes slippage, delayed engagement, and inconsistent performance—issues that compound quickly in...11321867- SKU:
- 11321867
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Inner Clutch Hub - CRF450X 18.1405
PROX
MSRP: $82.95Now: $68.00Was: $82.95A worn or damaged inner clutch hub compromises power delivery and creates unpredictable engagement, directly impacting your lap times and ride quality. The PROX Inner Clutch Hub for the CRF450X is precision-cast and machined to OEM specifications,...11321868- SKU:
- 11321868
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
MSRP: $82.95Now: $68.00Was: $82.95 -
On Sale
PROX Inner Clutch Hub - CRF450R 18.1413
PROX
MSRP: $93.95Now: $76.00Was: $93.95If your CRF450R's clutch engagement feels inconsistent or your shifts are becoming notchy, a worn inner clutch hub is often the culprit. The PROX 18.1413 is a precision-cast, OEM-specification replacement that restores smooth, predictable clutch...11321869- SKU:
- 11321869
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Inner Clutch Hub - CRF450L/R/X/RX 18.1417
PROX
MSRP: $89.95Now: $76.00Was: $89.95A worn or damaged inner clutch hub compromises power delivery and creates unpredictable engagement in your CRF450. The PROX 18.1417 restores OEM-spec performance with precision-cast construction, ensuring smooth clutch modulation whether you're running...11321870- SKU:
- 11321870
- Availability:
- Ships Same Business Day
- Weight:
- 0.87 LBS
MSRP: $89.95Now: $76.00Was: $89.95 -
On Sale
PROX Inner Clutch Hub - CRF450R/RX 18.1421
PROX
MSRP: $93.95Now: $76.00Was: $93.95The inner clutch hub is critical to reliable power transfer in your CRF450R or RX—wear or damage here directly impacts throttle response and overall clutch engagement. PROX delivers a precision-cast and machined hub manufactured to OEM specifications,...11321871- SKU:
- 11321871
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
MSRP: $93.95Now: $76.00Was: $93.95 -
On Sale
PROX Inner Clutch Hub - RM-Z450 18.3421
PROX
MSRP: $99.95Now: $82.00Was: $99.95A worn or damaged inner clutch hub compromises power delivery and creates unpredictable engagement—killing your lap times and putting unnecessary stress on the entire drivetrain. The PROX Inner Clutch Hub for RM-Z450 restores OEM-specification...11321872- SKU:
- 11321872
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
MSRP: $99.95Now: $82.00Was: $99.95 -
On Sale
PROX Inner Clutch Hub - KX250F 18.4348
PROX
MSRP: $77.95Now: $64.00Was: $77.95A worn or damaged inner clutch hub compromises power transfer and can leave you stranded at the track or trailside. The PROX Inner Clutch Hub for KX250F delivers OEM-specification durability with precision casting and machining, ensuring consistent...11321873- SKU:
- 11321873
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
MSRP: $77.95Now: $64.00Was: $77.95
