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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- Qty in Cart
- Quantity
- Price
- Subtotal
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PROX Top End Gasket Set - Kawasaki 35.4339
PROX
$88.95A quality top-end gasket set is the foundation of a reliable engine rebuild—sealing combustion chambers and preventing oil leaks that compromise performance. PROX's precision-engineered gasket set...09345767- SKU:
- 09345767
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$88.95 -
PROX Top End Gasket Set - KTM 35.6011
PROX
$22.95A quality gasket set is the foundation of a reliable top end—sealing surfaces under extreme combustion pressures so you can focus on performance, not leaks. The PROX Top End Gasket Set for KTM...09345772- SKU:
- 09345772
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$22.95 -
PROX Top End Gasket Set 35.6012
PROX
$30.95A compromised top end gasket set is a silent killer for engine reliability—allowing coolant and oil seepage that snowballs into catastrophic damage. The PROX 35.6012 Top End Gasket Set delivers...09345773- SKU:
- 09345773
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$30.95 -
PROX Top End Gasket Set - KTM 35.6018
PROX
$30.95A top-end gasket set is critical to maintaining proper combustion chamber sealing and preventing oil leakage in high-stress racing conditions. The PROX 35.6018 is engineered to OEM specifications for...09345774- SKU:
- 09345774
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
PROX Top End Gasket Set 35.6019
PROX
$30.95A top-end gasket set is the foundation of a reliable engine rebuild—it seals critical passages between cylinder head and block, preventing coolant and oil leaks that compromise performance and...09345775- SKU:
- 09345775
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
$30.95 -
PROX Top End Gasket Set - KTM/Husqvarna 35.6113
PROX
$30.95A quality top-end gasket set is essential for maintaining proper compression and preventing fluid leaks in high-stress racing environments. PROX's 35.6113 gasket set is engineered to exact OEM...09345777- SKU:
- 09345777
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
PROX Top End Gasket Set - KTM 35.6218
PROX
$30.95A compromised top end gasket set is a silent killer—fuel and oil escape where they shouldn't, compression drops, and your engine's reliability takes a hit. The PROX Top End Gasket Set for KTM...09345779- SKU:
- 09345779
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$30.95 -
PROX Top End Gasket Set - KTM 35.6222
PROX
$30.95A quality top-end gasket set is the foundation of a reliable rebuild—it seals critical combustion chambers and prevents oil leakage that can compromise engine performance. The PROX 35.6222 is...09345781- SKU:
- 09345781
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- RIDING STYLE:
- OFF-ROAD
$30.95 -
PROX Top End Gasket Set 35.6227
PROX
$46.95A quality top-end gasket set is the foundation of engine reliability—it seals critical combustion pressures and prevents costly coolant or oil leaks that can sideline your bike or car. The PROX 35...09345782- SKU:
- 09345782
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
$46.95 -
PROX Top End Gasket Set - KTM 35.6253
PROX
$30.95A top-end gasket set is essential maintenance for any KTM engine that's seen significant track time or mileage. PROX gaskets are precision-engineered to OEM specifications, ensuring reliable sealing...09345784- SKU:
- 09345784
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- UNITS:
- SET
$30.95Qty in Cart: 0Quantity:Price:$30.95Subtotal: -
PROX Top End Gasket Set - KTM 35.6326
PROX
$99.95A worn or damaged top end gasket set compromises combustion chamber sealing, leading to power loss, oil leakage, and potential engine damage. The PROX Top End Gasket Set for KTM delivers...09345789- SKU:
- 09345789
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- SET
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
$99.95 -
PROX Top End Gasket Set 35.6327
PROX
$44.05A worn or degraded top end gasket set compromises combustion chamber sealing, leading to compression loss, oil leakage, and reduced engine performance. The PROX Top End Gasket Set 35.6327 delivers...09345790- SKU:
- 09345790
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- RIDING STYLE:
- STREET
- UNITS:
- SET
$44.05Qty in Cart: 0Quantity:Price:$44.05Subtotal: -
PROX Top End Gasket Set - KTM 35.6340
PROX
$36.95A top-end gasket set is essential for maintaining proper combustion chamber sealing and preventing oil/coolant leaks that compromise engine performance. Whether you're rebuilding after high-mileage...09345792- SKU:
- 09345792
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$36.95 -
PROX Top End Gasket Set 35.6348
PROX
$34.95A properly sealed top end is the foundation of reliable engine performance, and worn gaskets compromise compression, invite oil leaks, and accelerate wear on critical components. The PROX Top End...09345796- SKU:
- 09345796
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
- RIDING STYLE:
- STREET
- TYPE:
- TOP END
$34.95Qty in Cart: 0Quantity:Price:$34.95Subtotal: -
PROX Top End Gasket Set - KTM/Husqvarna 35.6351
PROX
$83.95A top-end gasket set is critical infrastructure for maintaining proper combustion chamber sealing and preventing oil leakage between cylinder head and crankcase surfaces. PROX delivers OEM-equivalent...09345797- SKU:
- 09345797
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- RIDING STYLE:
- STREET
$83.95 -
PROX Top End Gasket Set - KTM 35.6420
PROX
$79.95A properly sealed top end is non-negotiable for engine reliability and performance consistency. PROX gasket sets are engineered to OEM specifications, eliminating leaks and combustion blow-by that...09345798- SKU:
- 09345798
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- SET
- RIDING STYLE:
- STREET
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
PROX Top End Gasket Set - KTM 35.6438
PROX
$83.95A top-end gasket set is critical for maintaining compression integrity and preventing oil leakage in your KTM's cylinder head. Without a fresh seal, you risk catastrophic engine damage, lost...09345801- SKU:
- 09345801
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
- UNITS:
- SET
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- STREET
$83.95 -
PROX Top End Gasket Set - KTM 35.6520
PROX
$79.95A top-end gasket set is critical to maintaining combustion chamber integrity and preventing oil seepage in high-revving engines. Whether you're rebuilding after a season of hard racing or performing...09345803- SKU:
- 09345803
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
PROX Gasket Kit - Complete - KTM 34.4315
PROX
$105.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures proper sealing across all critical junctions and prevents oil or coolant leaks that can compromise performance...09345860- SKU:
- 09345860
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
$105.95 -
PROX Gasket Kit - Complete 34.6216
PROX
$126.95A quality gasket kit is the foundation of engine reliability—sealing critical surfaces that prevent oil leaks, coolant loss, and combustion blow-by that compromise performance and longevity. PROX's...09346685- SKU:
- 09346685
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
$126.95 -
PROX Crank Seal Kit - CRF250R 42.1402
PROX
$22.95A compromised crank seal accelerates wear on your bottom end and invites contamination into critical bearing surfaces—a direct path to catastrophic engine failure. This PROX kit delivers OEM-quality...09350070- SKU:
- 09350070
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OIL
- PRODUCT NAME:
- SEAL
$22.95 -
PROX Crank Seal Kit - YZ125 42.2225
PROX
$16.95A worn or leaking crank seal will compromise engine compression and allow contamination into your bottom end—both costly problems that compromise reliability and performance. The PROX Crank Seal Kit...09350071- SKU:
- 09350071
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- OIL
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
$16.95 -
PROX Crank Seal Kit - RM250 42.3323
PROX
$29.95A worn crankshaft seal can silently undermine engine reliability, leading to oil leakage and costly damage that sidelined racers can't afford. The PROX Crank Seal Kit RM250 delivers OEM-quality seals...09350073- SKU:
- 09350073
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- CRANKSHAFT
- TYPE:
- OIL
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- OFF-ROAD
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal: -
PROX Water Pump Rebuild Kit - Honda 57.1015
PROX
$54.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating—especially under high-RPM racing conditions. The PROX Water Pump Rebuild Kit restores OEM performance and...09346984- SKU:
- 09346984
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
PROX Water Pump Rebuild Kit - Honda 57.1219
PROX
$41.95A failing water pump can silently destroy your engine's thermal management, leading to overheating, head gasket failure, and catastrophic damage that costs thousands to repair. The PROX Water Pump...09346985- SKU:
- 09346985
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$41.95 -
PROX Water Pump Rebuild Kit - Honda 57.1227
PROX
$36.95A failing water pump can compromise engine cooling efficiency and lead to catastrophic overheating—especially under racing conditions or sustained high-performance driving. The PROX Water Pump...09346987- SKU:
- 09346987
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$36.95 -
PROX Water Pump Rebuild Kit - Honda 57.1316
PROX
$62.95A failing water pump compromises cooling efficiency and risks catastrophic engine damage—especially under racing conditions or sustained high-performance driving. The PROX Water Pump Rebuild Kit...09346988- SKU:
- 09346988
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- REPAIR KIT
$62.95 -
PROX Water Pump Rebuild Kit - Honda 57.1319
PROX
$41.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating—especially critical under racing conditions or sustained high-performance driving. The PROX Water Pump...09346989- SKU:
- 09346989
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$41.95 -
PROX Water Pump Rebuild Kit - Honda 57.1321
PROX
$54.95A failing water pump can compromise engine cooling and lead to catastrophic overheating—especially under racing conditions or sustained high-performance driving. The PROX 57.1321 rebuild kit restores...09346990- SKU:
- 09346990
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$54.95Qty in Cart: 0Quantity:Price:$54.95Subtotal: -
PROX Water Pump Rebuild Kit - Honda 57.1322
PROX
$36.95A failing water pump can lead to catastrophic engine overheating and costly rebuilds. Rather than replacing the entire assembly, the PROX Water Pump Rebuild Kit gives you OEM-quality components at a...09346991- SKU:
- 09346991
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$36.95Qty in Cart: 0Quantity:Price:$36.95Subtotal: -
PROX Water Pump Rebuild Kit - Honda 57.1324
PROX
$36.95A failing water pump is one of the most common causes of unexpected engine damage and costly downtime. The PROX Water Pump Rebuild Kit gives you a cost-effective way to restore your Honda's cooling...09346992- SKU:
- 09346992
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
$36.95 -
PROX Water Pump Rebuild Kit - Honda 57.1424
PROX
$67.95A failing water pump is a silent threat to engine longevity—seal degradation and bearing wear go unnoticed until catastrophic failure strikes. The PROX Water Pump Rebuild Kit gives you a...09346994- SKU:
- 09346994
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$67.95Qty in Cart: 0Quantity:Price:$67.95Subtotal: -
PROX Water Pump Rebuild Kit - Honda 57.1425
PROX
$62.95A failing water pump can quickly compromise engine cooling and lead to catastrophic overheating—especially under racing conditions or sustained high-performance driving. The PROX Water Pump Rebuild...09346995- SKU:
- 09346995
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
$62.95 -
PROX Water Pump Rebuild Kit - Honda 57.1426
PROX
$62.95A failing water pump can silently compromise your engine's thermal management, leading to overheating and catastrophic damage during high-performance driving or extended track sessions. The PROX...09346996- SKU:
- 09346996
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$62.95 -
PROX Water Pump Rebuild Kit - Honda 57.1427
PROX
$41.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating—especially critical in high-performance applications where sustained heat loads are severe. The PROX...09346997- SKU:
- 09346997
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$41.95 -
PROX Water Pump Rebuild Kit - Honda 57.1429
PROX
$52.95Your Honda's cooling system depends on a properly functioning water pump—neglect it, and you're risking catastrophic engine failure. The PROX Water Pump Rebuild Kit gives you OEM-quality seals,...09346999- SKU:
- 09346999
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$52.95 -
On Sale
PROX Water Pump Rebuild Kit - Honda 57.1525
PROX
MSRP: $37.84Now: $24.00Was: $37.84A failing water pump is a silent killer that can leave you stranded mid-race or roadside. The PROX Water Pump Rebuild Kit gives you a cost-effective way to restore your Honda's cooling system to...09347001- SKU:
- 09347001
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- WATER PUMP
- PRODUCT NAME:
- REPAIR KIT
MSRP: $37.84Now: $24.00Was: $37.84Qty in Cart: 0Quantity:Price:MSRP: $37.84Now: $24.00Was: $37.84Subtotal: -
PROX Water Pump Rebuild Kit - Honda 57.1623
PROX
$154.95A failing water pump compromises your Honda's thermal management, risking catastrophic engine damage and costly downtime. The PROX 57.1623 rebuild kit restores your pump to OEM specifications with...09347002- SKU:
- 09347002
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
$154.95 -
PROX Water Pump Rebuild Kit - Yamaha 57.2114
PROX
$36.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating during high-performance operation. The PROX Water Pump Rebuild Kit restores OEM cooling capacity with...09347004- SKU:
- 09347004
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$36.95Qty in Cart: 0Quantity:Price:$36.95Subtotal: -
PROX Water Pump Rebuild Kit - Yamaha 57.2122
PROX
$36.95A failing water pump compromises engine cooling efficiency and risks catastrophic overheating—especially critical under racing conditions or sustained high-performance driving. The PROX 57.2122...09347005- SKU:
- 09347005
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
$36.95
