PROX
Prox Pistons, Gaskets, and Engine Components at JJ Motorsports
Prox, established in the late 1970s, is a respected brand in the powersports industry, specializing in high-performance aftermarket parts for motorcycles, ATVs, and off-road vehicles. With a focus on quality and innovation, Prox offers OEM-style replacements that deliver exceptional reliability and performance for both recreational riders and professionals.
At JJ Motorsports, we provide a comprehensive selection of Prox products, including complete gasket kits, top-end gasket sets, piston kits, connecting rod kits, crankshaft bearing/seal kits, and more. Whether you're rebuilding an engine or upgrading for better durability, Prox delivers precise-fit solutions compatible with major brands like Honda, Kawasaki, Suzuki, and KTM. Explore our inventory to find the ideal parts for your vehicle.
Key features of Prox products include precision engineering to OEM specifications, use of high-silicon-content aluminum alloys for pistons, double-forged construction for strength, and complete kits for easy installation. Shop now and enhance your powersports performance with Prox!
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- Price
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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...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...11321873- SKU:
- 11321873
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
MSRP: $77.95Now: $64.00Was: $77.95 -
On Sale
PROX Inner Clutch Hub - KX250/X 18.4351
PROX
MSRP: $71.95Now: $55.00Was: $71.95The inner clutch hub is a critical wear component that directly impacts power transfer and clutch engagement consistency on your KX250/X. A worn or damaged hub compromises shift quality, increases...11321874- SKU:
- 11321874
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
MSRP: $71.95Now: $55.00Was: $71.95 -
On Sale
PROX Inner Clutch Hub - Kawasaki 18.4406
PROX
MSRP: $77.95Now: $64.00Was: $77.95The inner clutch hub is the critical load-bearing component that transfers engine power to your primary clutch basket—any wear or damage here directly compromises acceleration response and overall...11321875- SKU:
- 11321875
- Availability:
- Ships Same Business Day
- Weight:
- 1.09 LBS
MSRP: $77.95Now: $64.00Was: $77.95 -
On Sale
PROX Inner Clutch Hub - KX450F/X 18.4411
PROX
MSRP: $77.95Now: $64.00Was: $77.95A worn or damaged inner clutch hub compromises power delivery and throttle response on your KX450F/X. The PROX Inner Clutch Hub is precision-cast and machined to OEM specifications, ensuring reliable...11321876- SKU:
- 11321876
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
MSRP: $77.95Now: $64.00Was: $77.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - Husqvarna 16.950012
PROX
MSRP: $71.95Now: $56.00Was: $71.95A worn or leaking clutch slave cylinder compromises your shift precision and can leave you stranded. This PROX rebuild kit gives you a complete, cost-effective solution to restore your Husqvarna's...11321878- SKU:
- 11321878
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
MSRP: $71.95Now: $56.00Was: $71.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - Gas Gas/Husqvarna/KTM 16.950013
PROX
MSRP: $71.95Now: $56.00Was: $71.95A worn or leaking clutch slave cylinder compromises your bike's clutch engagement and creates safety risks on the track or trail. This PROX rebuild kit delivers all necessary internal components to...11321879- SKU:
- 11321879
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
MSRP: $71.95Now: $56.00Was: $71.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - Gas Gas/Husqvarna/KTM 16.950014
PROX
MSRP: $71.95Now: $56.00Was: $71.95A worn or leaking clutch slave cylinder compromises your shift precision and can leave you stranded. This PROX rebuild kit gives you everything needed to restore full hydraulic function without...11321880- SKU:
- 11321880
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
MSRP: $71.95Now: $56.00Was: $71.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - Gas Gas/Husqvarna/KTM 16.950015
PROX
MSRP: $71.95Now: $56.00Was: $71.95A worn or deteriorating clutch slave cylinder compromises your bike's clutch engagement and modulation—critical factors for precise control on the track or trail. This rebuild kit restores your...11321881- SKU:
- 11321881
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
MSRP: $71.95Now: $56.00Was: $71.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - KX250/450F/X 16.950016
PROX
MSRP: $37.95Now: $30.00Was: $37.95A worn or failing clutch slave cylinder compromises your bike's clutch engagement, leading to sluggish shifts, dragging clutch, and potential damage to your transmission. This PROX rebuild kit gives...11321882- SKU:
- 11321882
- Availability:
- Ships Same Business Day
- Weight:
- 0.17 LBS
MSRP: $37.95Now: $30.00Was: $37.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - 690 Enduro R 16.950038
PROX
MSRP: $71.95Now: $56.00Was: $71.95A worn or leaking clutch slave cylinder compromises your ability to modulate power delivery precisely—critical whether you're trail riding or pushing the 690 Enduro R to its limits. This rebuild kit...11321883- SKU:
- 11321883
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $71.95Now: $56.00Was: $71.95 -
On Sale
PROX Clutch Slave Cylinder Rebuild Kit - CRF 450R/RX 16.950040
PROX
MSRP: $37.95Now: $30.00Was: $37.95A worn or leaking clutch slave cylinder compromises your bike's engagement precision and can leave you stranded mid-ride. This PROX rebuild kit restores your CRF 450R/RX to factory hydraulic...11321884- SKU:
- 11321884
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $37.95Now: $30.00Was: $37.95 -
On Sale
PROX Friction Plate Set - CRF250R/RX 16.S13093
PROX
MSRP: $102.95Now: $85.00Was: $102.95Worn or glazed friction plates compromise clutch engagement and throttle response—critical issues on a race-prepped or high-mileage CRF250R/RX. This OEM-spec friction plate set restores precise bite...11313914- SKU:
- 11313914
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
MSRP: $102.95Now: $85.00Was: $102.95 -
On Sale
PROX Friction Plate Set - CRF250R/RX 16.S13094
PROX
MSRP: $112.95Now: $93.00Was: $112.95Worn or glazed friction plates compromise clutch response and throttle control—especially critical on track or in competitive riding. This OEM-spec friction plate set restores precise engagement and...11313915- SKU:
- 11313915
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
MSRP: $112.95Now: $93.00Was: $112.95 -
On Sale
PROX Friction Plate Set - CRF450R/L/X/RX 16.S14091
PROX
MSRP: $81.95Now: $68.00Was: $81.95A worn or glazed clutch friction plate set robs your CRF450 of crisp power delivery and smooth engagement, leading to slippage under load and inconsistent performance. This OEM-specification friction...11313916- SKU:
- 11313916
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
MSRP: $81.95Now: $68.00Was: $81.95 -
On Sale
PROX Friction Plate Set - YZ65 16.S20018
PROX
MSRP: $63.95Now: $51.00Was: $63.95A worn or slipping clutch can cost you race time and reliability when you need it most. The PROX Friction Plate Set delivers OEM-exact performance for your YZ65, restoring crisp engagement and smooth...11313917- SKU:
- 11313917
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $63.95Now: $51.00Was: $63.95 -
On Sale
PROX Friction Plate Set - Yamaha 16.S23065
PROX
MSRP: $102.95Now: $85.00Was: $102.95A worn or glazed clutch friction plate set compromises your ability to deliver power consistently and safely, whether you're on the track or the street. PROX Friction Plate Sets are manufactured to...11313918- SKU:
- 11313918
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
MSRP: $102.95Now: $85.00Was: $102.95 -
On Sale
PROX Friction Plate Set - YZ450F 16.S24066
PROX
MSRP: $122.95Now: $102.00Was: $122.95A worn or glazed clutch plate set directly compromises throttle response and power delivery on your YZ450F—compromising both track performance and trail reliability. The PROX Friction Plate Set...11313919- SKU:
- 11313919
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
MSRP: $122.95Now: $102.00Was: $122.95 -
On Sale
PROX Friction Plate Set - KX250/X 16.S43041
PROX
MSRP: $122.95Now: $102.00Was: $122.95A worn or glazed friction plate set compromises clutch engagement and throttle response—critical factors whether you're racing competitively or pushing your KX250/X hard on the track. This...11313920- SKU:
- 11313920
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
MSRP: $122.95Now: $102.00Was: $122.95 -
On Sale
PROX Friction Plate Set - KX450F 16.S44029
PROX
MSRP: $102.95Now: $85.00Was: $102.95A worn or glazed clutch friction plate set robs your KX450F of engagement precision and throttle response—exactly what you can't afford in competitive riding or trail work. This OEM-spec PROX...11313921- SKU:
- 11313921
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
MSRP: $102.95Now: $85.00Was: $102.95 -
On Sale
PROX Friction Plate Set - Gas Gas/Husqvarma/KTM 16.S53009
PROX
MSRP: $102.95Now: $85.00Was: $102.95Your clutch's friction plates are the critical interface between engine power and wheel traction—wear or glazing here directly compromises bite, modulation, and overall drivetrain reliability. This...11313924- SKU:
- 11313924
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
MSRP: $102.95Now: $85.00Was: $102.95 -
On Sale
PROX Friction Plate Set - SE 2.5/3.0 i-F 16.S73008
PROX
MSRP: $102.95Now: $85.00Was: $102.95A worn or glazed clutch friction plate set compromises both drivability and power transfer—especially critical in performance applications where precision engagement directly impacts lap times and...11313925- SKU:
- 11313925
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
MSRP: $102.95Now: $85.00Was: $102.95 -
On Sale
PROX Steel Plate Set - CRF250R/RX 16.S13095
PROX
MSRP: $78.95Now: $64.00Was: $78.95Worn or glazed clutch plates kill performance and reliability—especially on a high-revving 250cc engine where precision matters. The PROX Steel Plate Set restores OEM-spec friction characteristics...11313927- SKU:
- 11313927
- Availability:
- Ships Same Business Day
- Weight:
- 1.14 LBS
MSRP: $78.95Now: $64.00Was: $78.95 -
On Sale
PROX Steel Plate Set - CRF450R/L/X/RX 16.S14092
PROX
MSRP: $62.95Now: $51.00Was: $62.95Your CRF450's clutch performance depends on precision-engineered friction surfaces that can handle aggressive riding and repeated heat cycles. ProX steel plates are manufactured to OEM...11313928- SKU:
- 11313928
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
MSRP: $62.95Now: $51.00Was: $62.95 -
On Sale
PROX Steel Plate Set - YZ65 16.S20019
PROX
MSRP: $27.95Now: $22.00Was: $27.95Steel clutch plates wear with every heat cycle, and worn plates kill your YZ65's power delivery and ruin shift quality. The PROX Steel Plate Set restores OEM clutch performance with...11313929- SKU:
- 11313929
- Availability:
- Ships Same Business Day
- Weight:
- 0.77 LBS
MSRP: $27.95Now: $22.00Was: $27.95 -
On Sale
PROX Steel Plate Set - YZ450F 16.S24067
PROX
MSRP: $78.95Now: $64.00Was: $78.95A worn or damaged clutch plate set directly impacts power delivery and throttle response on your YZ450F. The PROX Steel Plate Set restores OEM-spec friction characteristics, ensuring consistent...11313930- SKU:
- 11313930
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
MSRP: $78.95Now: $64.00Was: $78.95 -
On Sale
PROX Steel Plate Set - KX250/X 16.S43042
PROX
MSRP: $52.95Now: $42.00Was: $52.95Worn or glazed clutch plates are a silent performance killer—they rob you of crisp engagement and predictable power delivery when you need it most. The PROX Steel Plate Set restores OEM-spec friction...11313931- SKU:
- 11313931
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
MSRP: $52.95Now: $42.00Was: $52.95 -
On Sale
PROX Crankshaft Bearing/Seal Kit - Gas Gas/Husqvarna/KTM 23.CBS63017
PROX
MSRP: $169.95Now: $136.00Was: $169.95A worn crankshaft bearing or degraded seal compromises engine reliability and can lead to catastrophic internal damage. This OEM-specification kit delivers complete bearing and seal replacement,...09240707- SKU:
- 09240707
- Availability:
- Ships Same Business Day
- Weight:
- 1.03 LBS
MSRP: $169.95Now: $136.00Was: $169.95 -
On Sale
PROX Cam Chain - 92RH2015 - 104 Links - Gas Gas | Honda | Husqvarna | KTM | Sherco 31.1335
PROX
MSRP: $99.95Now: $68.00Was: $99.95A compromised cam chain directly impacts engine timing precision and reliability—especially critical in high-demand racing and off-road applications. The PROX 92RH2015 is engineered to OEM...09250355- SKU:
- 09250355
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
MSRP: $99.95Now: $68.00Was: $99.95 -
On Sale
PROX Clutch Basket - Honda 17.1220F
PROX
MSRP: $299.95Now: $221.00Was: $299.95A worn or damaged clutch basket degrades engagement quality and creates inconsistent power delivery—a critical liability in racing or high-performance applications. The PROX 17.1220F replaces factory...11321964- SKU:
- 11321964
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
MSRP: $299.95Now: $221.00Was: $299.95 -
On Sale
PROX Clutch Basket - Honda 17.1403F
PROX
MSRP: $316.95Now: $246.00Was: $316.95A worn or damaged clutch basket directly impacts engagement quality and power delivery—two critical factors that separate consistent lap times from inconsistent performance. The PROX 17.1403F...11321965- SKU:
- 11321965
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
MSRP: $316.95Now: $246.00Was: $316.95 -
On Sale
PROX Clutch Basket - RM 125 17.3292F
PROX
MSRP: $299.95Now: $221.00Was: $299.95OE-precision clutch baskets wear down under racing loads, causing inconsistent engagement and premature failure. The PROX Clutch Basket for RM 125 eliminates this problem through aerospace-grade...11321966- SKU:
- 11321966
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
MSRP: $299.95Now: $221.00Was: $299.95 -
On Sale
PROX Clutch Basket - RM 250 17.3396F
PROX
MSRP: $299.95Now: $221.00Was: $299.95OEM clutch baskets wear prematurely under racing loads, causing inconsistent engagement and reduced power delivery. The PROX RM 250 clutch basket eliminates this problem with aerospace-grade...11321968- SKU:
- 11321968
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
MSRP: $299.95Now: $221.00Was: $299.95 -
On Sale
PROX Clutch Plate Set - SX 60/65 16.CPS60098
PROX
MSRP: $105.95Now: $85.00Was: $105.95If you're pushing your SX 60/65 to the limit, OEM clutch plates won't cut it—they'll slip under hard acceleration and leave you wondering if you've got enough power. The PROX Clutch Plate Set gives...11313952- SKU:
- 11313952
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
MSRP: $105.95Now: $85.00Was: $105.95 -
On Sale
PROX Clutch Plate Set - Banshee 350 16.CPS23087
PROX
MSRP: $143.95Now: $119.00Was: $143.95ATV clutch performance degrades under high-demand riding conditions, causing slippage and delayed power transfer when you need it most. The PROX Clutch Plate Set for the Banshee 350 delivers complete...11312531- SKU:
- 11312531
- Availability:
- Ships Same Business Day
- Weight:
- 1.42 LBS
MSRP: $143.95Now: $119.00Was: $143.95 -
On Sale
PROX Clutch Plate Set - YZ 450F 16.CPS24014
PROX
MSRP: $155.95Now: $127.00Was: $155.95If you're experiencing clutch slip under aggressive throttle or heavy load, a worn or marginal clutch plate set will cost you consistency and control on the track. The PROX Clutch Plate Set for YZ...11312542- SKU:
- 11312542
- Availability:
- Ships Same Business Day
- Weight:
- 2.18 LBS
MSRP: $155.95Now: $127.00Was: $155.95Qty in Cart: 0Quantity:Price:MSRP: $155.95Now: $127.00Was: $155.95Subtotal: -
On Sale
PROX Clutch Pressure Plate - KX 125 18.P4294
PROX
MSRP: $57.95Now: $47.00Was: $57.95A worn or damaged clutch pressure plate directly compromises your KX 125's power transfer and throttle response, forcing you to compensate with riding technique instead of trusting your machine. This...11311492- SKU:
- 11311492
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
MSRP: $57.95Now: $47.00Was: $57.95Qty in Cart: 0Quantity:Price:MSRP: $57.95Now: $47.00Was: $57.95Subtotal: -
On Sale
PROX Clutch Plate Set - CR 250R 16.CPS13097
PROX
MSRP: $205.95Now: $187.00Was: $205.95CR 250R riders pushing hard on the track need clutch engagement they can trust lap after lap. This PROX Clutch Plate Set delivers the reliability of OEM construction with upgraded spring rates that...11312509- SKU:
- 11312509
- Availability:
- Ships Same Business Day
- Weight:
- 1.54 LBS
MSRP: $205.95Now: $187.00Was: $205.95 -
On Sale
PROX Clutch Plate Set - CR 500R 16.CPS15090
PROX
MSRP: $205.95Now: $187.00Was: $205.95A worn or slipping clutch costs you drive off the line and control through aggressive riding. The PROX Clutch Plate Set delivers OEM-level reliability with enhanced spring stiffness—eliminating slip...11312516- SKU:
- 11312516
- Availability:
- Ships Same Business Day
- Weight:
- 1.37 LBS
MSRP: $205.95Now: $187.00Was: $205.95 -
On Sale
PROX Clutch Plate Set - Gas Gas/Yamaha 16.CPS23001
PROX
MSRP: $171.95Now: $144.00Was: $171.95Clutch slippage under load kills performance and confidence in the cockpit. The PROX Clutch Plate Set delivers a complete friction and steel plate assembly engineered to eliminate that problem, with...11312526- SKU:
- 11312526
- Availability:
- Ships Same Business Day
- Weight:
- 1.66 LBS
MSRP: $171.95Now: $144.00Was: $171.95
