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!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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PROX Piston Kit 01.2429.C
PROX
$195.95Your engine's heart demands precision engineering and materials that can withstand extreme combustion pressures cycle after cycle. The PROX Piston Kit 01.2429.C delivers exactly that—OEM-equivalent...09030829- SKU:
- 09030829
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 95.00 MM
- PISTON SIZE METRIC:
- STANDARD SIZE C
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- TYPE:
- TOP END
- UNITS:
- EACH
$195.95 -
PROX Piston Kit 01.4121.C
PROX
$89.95A piston kit is the heart of engine reliability and performance—worn or damaged pistons directly compromise compression, power delivery, and engine longevity. The PROX Piston Kit 01.4121.C delivers...09030830- SKU:
- 09030830
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- BORE SIZE METRIC:
- 48.50 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- STANDARD SIZE C
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- TOP END
$89.95Qty in Cart: 0Quantity:Price:$89.95Subtotal: -
PROX Fork Seal/Wiper Kit - 48 mm ID x 58 mm OD x 9.4 mm T 40.S48589.4
PROX
$73.95Fork seals and wipers are critical wear items that directly impact your suspension's performance and longevity. Degraded seals allow oil to escape and contamination to enter, reducing damping...04070348- SKU:
- 04070348
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER:
- 58,00 MM (2,28')
- THICKNESS IMPERIAL:
- 0.37'
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 9,40 MM (0,37')
- UNITS:
- KIT
- INSIDE DIAMETER:
- 48,00 MM (1,89')
$73.95 -
PROX Fork Seal/Wiper Kit - 35 mm ID x 48 mm OD x 11 mm T 40.S354811
PROX
$41.95Fork seals and wipers are critical wear items that directly impact your suspension's performance and longevity. Worn seals allow hydraulic fluid to escape, leading to reduced damping, poor handling,...04070184- SKU:
- 04070184
- Availability:
- Ships Same Business Day
- Weight:
- 0.22 LBS
- OUTSIDE DIAMETER:
- 48,00 MM (1,89')
- PRODUCT NAME:
- FORK SEAL/WIPER
- THICKNESS IMPERIAL:
- 0.43'
- UNITS:
- KIT
- INSIDE DIAMETER:
- 35,00 MM (1,38')
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- 11,00 MM (0,43')
$41.95 -
On Sale
PROX Fork Seal/Wiper Kit - 48 mm ID x 57.80 mm OD x 9 mm T 40.S4857.89
PROX
MSRP: $62.95Now: $51.00Was: $62.95Fork seals wear out—it's not a question of if, but when. Worn seals compromise suspension performance, allow hydraulic fluid to leak onto your brakes, and can damage fork internals if left unchecked...04070188- SKU:
- 04070188
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- INSIDE DIAMETER:
- 48,00 MM (1,89')
- RIDING STYLE:
- OFF-ROAD
- OUTSIDE DIAMETER:
- 57,80 MM (2,28')
- THICKNESS:
- 9,00 MM (0,35')
- THICKNESS IMPERIAL:
- 0.35'
- UNITS:
- KIT
- PRODUCT NAME:
- FORK SEAL/WIPER
MSRP: $62.95Now: $51.00Was: $62.95 -
On Sale
PROX Fork Protectors - 130 mm 40.FSP1304450
PROX
MSRP: $22.95Now: $17.00Was: $22.95Fork seals are vulnerable to damage from rocks, sand, and debris encountered during aggressive riding—compromising suspension performance and leading to costly repairs. PROX Fork Protectors shield...04060109- SKU:
- 04060109
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- YELLOW
- LENGTH IMPERIAL:
- 5.125'
- TYPE:
- FORK
- UNITS:
- PAIR
- FOR FORK TUBE DIAMETER IMPERIAL:
- 1.73' - 1.98'
- PRODUCT NAME:
- PROTECTOR
- BASE COLOR:
- BLACK
MSRP: $22.95Now: $17.00Was: $22.95 -
On Sale
PROX Fork Protectors - 360 mm 40.FSP3604450
PROX
MSRP: $23.95Now: $21.00Was: $23.95Fork seals are vulnerable to contamination from sand, rocks, and trail debris—damage that can compromise suspension performance and lead to costly repairs. PROX Fork Protectors shield your seals with...04060110- SKU:
- 04060110
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- BLACK
- COLOR/FINISH:
- YELLOW
- TYPE:
- FORK
- UNITS:
- PAIR
- FOR FORK TUBE DIAMETER IMPERIAL:
- 1.73' - 1.98'
- LENGTH IMPERIAL:
- 14.16'
- PRODUCT NAME:
- PROTECTOR
- BASE COLOR:
- BLACK
MSRP: $23.95Now: $21.00Was: $23.95 -
On Sale
PROX Fork Seal/Wiper Kit - KX65 40.S334611P
PROX
MSRP: $41.95Now: $34.00Was: $41.95Fork seals and wipers are critical wear items that directly impact your suspension's performance and longevity. A degraded seal allows hydraulic fluid to escape, compromising damping consistency and...04070679- SKU:
- 04070679
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- OUTSIDE DIAMETER:
- -
- THICKNESS:
- -
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS IMPERIAL:
- -
- UNITS:
- KIT
- INSIDE DIAMETER:
- 43,00 MM (1,69')
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Fork Seal/Wiper Kit - KTM 50 40.S354611P
PROX
MSRP: $39.95Now: $34.00Was: $39.95Fork seals and wipers are critical wear items that directly impact your KTM 50's handling precision and suspension reliability. Degraded seals allow hydraulic fluid to escape, compromising damping...04070680- SKU:
- 04070680
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- INSIDE DIAMETER:
- 35,00 MM (1,37')
- THICKNESS:
- -
- OUTSIDE DIAMETER:
- -
- THICKNESS IMPERIAL:
- -
MSRP: $39.95Now: $34.00Was: $39.95 -
On Sale
PROX Fork Seal/Wiper Kit 40.S354710P
PROX
MSRP: $41.95Now: $34.00Was: $41.95Fork seals and wipers are critical wear items that directly impact suspension performance and longevity. Deteriorated seals allow hydraulic fluid to leak onto your suspension components, compromising...04070308- SKU:
- 04070308
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- THICKNESS IMPERIAL:
- -
- INSIDE DIAMETER:
- 35,00 MM (1,37')
- PRODUCT NAME:
- FORK SEAL/WIPER
- RIDING STYLE:
- OFF-ROAD
- THICKNESS:
- -
- UNITS:
- KIT
- OUTSIDE DIAMETER:
- -
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Piston Kit 01.1323.A
PROX
MSRP: $143.95Now: $119.00Was: $143.95When your engine's pistons show signs of wear or damage, replacement isn't optional—it's essential for maintaining compression, preventing catastrophic failure, and preserving your engine's...PX1322A- SKU:
- PX1322A
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PRODUCT NAME:
- PISTON KIT
- PISTON DIAMETER METRIC:
- 66.34 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.34 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
MSRP: $143.95Now: $119.00Was: $143.95 -
On Sale
PROX Piston Kit 01.1323.B
PROX
MSRP: $139.95Now: $119.00Was: $139.95When your engine demands reliability under extreme conditions, OEM-spec pistons are non-negotiable. The PROX Piston Kit 01.1323.B delivers Japanese manufacturing precision and high-silicon aluminum...PX1322B- SKU:
- PX1322B
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 66.35 MM
- PISTON DIAMETER METRIC:
- 66.35 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON SIZE METRIC:
- STANDARD SIZE A
- RIDING STYLE:
- OFF-ROAD
MSRP: $139.95Now: $119.00Was: $139.95 -
On Sale
PROX Piston Kit 01.2114.A
PROX
MSRP: $99.95Now: $76.00Was: $99.95Worn or damaged pistons compromise compression, reliability, and power output—making a quality replacement essential for any engine rebuild or high-mileage refresh. The PROX Piston Kit 01.2114.A...PX2112A- SKU:
- PX2112A
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 47.44 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.44 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON SIZE METRIC:
- STANDARD SIZE A
MSRP: $99.95Now: $76.00Was: $99.95 -
On Sale
PROX Piston Kit 01.2114.B
PROX
MSRP: $99.95Now: $76.00Was: $99.95Piston failure compromises engine reliability and performance—whether you're rebuilding after catastrophic wear or upgrading to factory-plus specifications. The PROX Piston Kit 01.2114.B delivers...PX2112B- SKU:
- PX2112B
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.45 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- STANDARD SIZE B
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- BORE SIZE METRIC:
- 47.45 MM
- RIDING STYLE:
- OFF-ROAD
MSRP: $99.95Now: $76.00Was: $99.95 -
On Sale
PROX Piston Kit 01.2224.A
PROX
MSRP: $121.95Now: $90.00Was: $121.95When your engine's stock pistons reach the end of their service life, you need a direct replacement that matches OEM specifications without compromise. The PROX Piston Kit 01.2224.A delivers the...PX2222A- SKU:
- PX2222A
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PISTON DIAMETER METRIC:
- 53.94 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 53.94 MM
- PISTON SIZE METRIC:
- STANDARD SIZE A
- PRODUCT NAME:
- PISTON KIT
MSRP: $121.95Now: $90.00Was: $121.95 -
On Sale
PROX Piston Kit 01.2224.B
PROX
MSRP: $121.95Now: $90.00Was: $121.95When your engine demands reliability and precision, OEM-quality pistons are non-negotiable. The PROX Piston Kit 01.2224.B delivers factory-spec performance without factory downtime, engineered in...PX2222B- SKU:
- PX2222B
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- BORE SIZE METRIC:
- 53.95 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- STANDARD SIZE B
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 53.95 MM
- PRODUCT NAME:
- PISTON KIT
MSRP: $121.95Now: $90.00Was: $121.95 -
On Sale
PROX Ring Set 02.2222
PROX
MSRP: $24.95Now: $21.00Was: $24.95Piston rings are critical to engine sealing and compression—worn or damaged rings lead to blow-by, oil consumption, and loss of horsepower. The PROX Ring Set 02.2222 delivers OEM-quality replacement...PX2222R- SKU:
- PX2222R
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
MSRP: $24.95Now: $21.00Was: $24.95Qty in Cart: 0Quantity:Price:MSRP: $24.95Now: $21.00Was: $24.95Subtotal: -
On Sale
PROX Ring Set 02.1495.000
PROX
MSRP: $49.95Now: $42.00Was: $49.95Piston ring failure compromises compression, oil control, and engine efficiency—leading to power loss, increased blowby, and accelerated wear. The PROX Ring Set 02.1495.000 delivers OEM-specification...PX2500R- SKU:
- PX2500R
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- SET
MSRP: $49.95Now: $42.00Was: $49.95 -
On Sale
PROX Ring Set 02.1495.025
PROX
MSRP: $47.34Now: $42.00Was: $47.34Piston ring sets are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact compression, power delivery, and engine longevity. The PROX Ring Set...PX2501R- SKU:
- PX2501R
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
MSRP: $47.34Now: $42.00Was: $47.34 -
On Sale
PROX Piston Kit 01.1495.050
PROX
MSRP: $155.95Now: $119.00Was: $155.95When your engine demands reliability at high RPM, OEM-quality pistons are non-negotiable. The PROX Piston Kit 01.1495.050 delivers factory-spec performance without compromise, engineered to handle...PX2502- SKU:
- PX2502
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- PISTON DIAMETER METRIC:
- 85.50 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 85.50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE IMPERIAL:
- +0.020'
- UNITS:
- EACH
MSRP: $155.95Now: $119.00Was: $155.95 -
On Sale
PROX Piston Kit 01.1495.100
PROX
MSRP: $139.95Now: $119.00Was: $139.95Worn or damaged pistons compromise combustion efficiency, reduce power output, and risk catastrophic engine failure. The PROX Piston Kit 01.1495.100 restores your engine to OEM performance...PX2504- SKU:
- PX2504
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- PISTON DIAMETER METRIC:
- 86.00 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE IMPERIAL:
- +0.040'
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 86.00 MM
MSRP: $139.95Now: $119.00Was: $139.95Qty in Cart: 0Quantity:Price:MSRP: $139.95Now: $119.00Was: $139.95Subtotal: -
On Sale
PROX Piston Kit 01.1408.000
PROX
MSRP: $185.95Now: $158.00Was: $185.95A worn or damaged piston kit compromises combustion efficiency, increases blow-by, and can lead to catastrophic engine failure. The PROX Piston Kit 01.1408.000 restores your engine to OEM performance...PX4040- SKU:
- PX4040
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- STANDARD
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 89.00 MM
- PISTON DIAMETER METRIC:
- 89.00 MM
- PRODUCT NAME:
- PISTON KIT
MSRP: $185.95Now: $158.00Was: $185.95 -
On Sale
PROX Piston Kit 01.1408.025
PROX
MSRP: $185.95Now: $158.00Was: $185.95When your engine's pistons show wear, you're losing compression, efficiency, and power. The PROX Piston Kit 01.1408.025 restores your engine to OEM performance specifications with...PX4041- SKU:
- PX4041
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- PISTON DIAMETER METRIC:
- 89.25 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM ALLOY
- BORE SIZE METRIC:
- 89.25 MM
- PISTON SIZE IMPERIAL:
- +0.010'
- PRODUCT NAME:
- PISTON KIT
MSRP: $185.95Now: $158.00Was: $185.95Qty in Cart: 0Quantity:Price:MSRP: $185.95Now: $158.00Was: $185.95Subtotal: -
On Sale
PROX Piston Kit 01.1408.050
PROX
MSRP: $185.95Now: $158.00Was: $185.95A piston kit is fundamental to engine reliability and performance—worn or damaged pistons compromise compression, increase blow-by, and accelerate engine wear. The PROX Piston Kit 01.1408.050...PX4042- SKU:
- PX4042
- Availability:
- Ships Same Business Day
- Weight:
- 1.26 LBS
- BORE SIZE METRIC:
- 89.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- EACH
- PISTON SIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 89.50 MM
MSRP: $185.95Now: $158.00Was: $185.95 -
On Sale
PROX Piston Kit 01.1408.075
PROX
MSRP: $185.95Now: $158.00Was: $185.95Your engine's heart demands precision and reliability—and the PROX Piston Kit 01.1408.075 delivers exactly that. Built to OEM specifications with Japanese manufacturing excellence, these pistons...PX4043- SKU:
- PX4043
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 89.75 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 89.75 MM
- PISTON SIZE IMPERIAL:
- +0.030'
- PRODUCT NAME:
- PISTON KIT
MSRP: $185.95Now: $158.00Was: $185.95Qty in Cart: 0Quantity:Price:MSRP: $185.95Now: $158.00Was: $185.95Subtotal: -
On Sale
PROX Piston Kit 01.1408.100
PROX
MSRP: $199.95Now: $158.00Was: $199.95Worn or damaged pistons compromise combustion efficiency, reduce power output, and risk catastrophic engine failure. The PROX Piston Kit 01.1408.100 delivers OEM-specification performance with...PX4044- SKU:
- PX4044
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BORE SIZE METRIC:
- 90.00 MM
- PISTON DIAMETER METRIC:
- 90.00 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- +1.00 MM
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
MSRP: $199.95Now: $158.00Was: $199.95 -
On Sale
PROX Piston Kit 01.1408.125
PROX
MSRP: $185.95Now: $158.00Was: $185.95When your engine demands reliability and precision, OEM-equivalent performance is non-negotiable. The PROX Piston Kit 01.1408.125 delivers exact fitment and durability through Japanese manufacturing...PX4045- SKU:
- PX4045
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 90.25 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 90.25 MM
- PISTON SIZE IMPERIAL:
- +0.050'
- RIDING STYLE:
- OFF-ROAD
MSRP: $185.95Now: $158.00Was: $185.95 -
On Sale
PROX Piston Kit 01.2281.000
PROX
MSRP: $121.95Now: $90.00Was: $121.95When your engine's pistons wear beyond serviceable limits, you need a replacement that matches OEM performance without compromise. The PROX Piston Kit 01.2281.000 delivers precision-engineered...PX4170- SKU:
- PX4170
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- BORE SIZE METRIC:
- 66.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 66.35 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
MSRP: $121.95Now: $90.00Was: $121.95Qty in Cart: 0Quantity:Price:MSRP: $121.95Now: $90.00Was: $121.95Subtotal: -
On Sale
PROX Piston Kit 01.2281.150
PROX
MSRP: $105.95Now: $90.00Was: $105.95A piston kit is the heart of engine reliability and performance—worn or damaged pistons compromise combustion efficiency, increase blowby, and accelerate wear throughout your engine. The PROX Piston...PX4176- SKU:
- PX4176
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 67.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 67.50 MM
- PISTON SIZE METRIC:
- +1.50 MM
MSRP: $105.95Now: $90.00Was: $105.95Qty in Cart: 0Quantity:Price:MSRP: $105.95Now: $90.00Was: $105.95Subtotal: -
On Sale
PROX Piston Kit 01.2020.000
PROX
MSRP: $121.95Now: $85.00Was: $121.95A worn or damaged piston kit compromises engine compression, throttle response, and overall reliability—costing you performance on the track or road. The PROX Piston Kit 01.2020.000 restores your...PX4190- SKU:
- PX4190
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 64.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 64.00 MM
- PISTON SIZE METRIC:
- STANDARD
- RIDING STYLE:
- STREET
MSRP: $121.95Now: $85.00Was: $121.95 -
On Sale
PROX Ring Set 02.2020.000
PROX
MSRP: $49.47Now: $42.00Was: $49.47Piston ring failure is one of the fastest ways to lose compression and power in your engine—and once sealing deteriorates, you're looking at blow-by, oil consumption, and catastrophic damage. The...PX4190R- SKU:
- PX4190R
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
MSRP: $49.47Now: $42.00Was: $49.47 -
On Sale
PROX Piston Kit 01.2020.025
PROX
MSRP: $99.95Now: $85.00Was: $99.95A piston kit is the foundation of reliable engine performance—worn or damaged pistons compromise compression, efficiency, and durability. The PROX Piston Kit 01.2020.025 delivers OEM-equivalent...PX4191- SKU:
- PX4191
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- BORE SIZE METRIC:
- 64.25 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- PISTON SIZE METRIC:
- +0.25 MM
- RIDING STYLE:
- STREET
- PISTON DIAMETER METRIC:
- 64.25 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $99.95Now: $85.00Was: $99.95 -
On Sale
PROX Ring Set 02.2020.025
PROX
MSRP: $49.95Now: $42.00Was: $49.95Piston ring wear is one of the most common culprits behind lost compression, increased blow-by, and accelerated engine degradation. The PROX Ring Set 02.2020.025 restores OEM-spec ring sealing and...PX4191R- SKU:
- PX4191R
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
MSRP: $49.95Now: $42.00Was: $49.95Qty in Cart: 0Quantity:Price:MSRP: $49.95Now: $42.00Was: $49.95Subtotal: -
On Sale
PROX Ring Set 02.2020.050
PROX
MSRP: $49.95Now: $42.00Was: $49.95Piston rings are the critical seal between your combustion chamber and crankcase—when they wear, you lose compression, burn oil, and sacrifice power across the entire RPM range. The PROX Ring Set 02...PX4192R- SKU:
- PX4192R
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
MSRP: $49.95Now: $42.00Was: $49.95 -
On Sale
PROX Piston Kit 01.2020.075
PROX
MSRP: $121.95Now: $85.00Was: $121.95Worn or damaged pistons compromise combustion efficiency, increase blow-by, and accelerate engine wear—ultimately costing you power and reliability. The PROX Piston Kit 01.2020.075 restores your...PX4193- SKU:
- PX4193
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 64.75 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PISTON SIZE METRIC:
- +0.75 MM
- BORE SIZE METRIC:
- 64.75 MM
MSRP: $121.95Now: $85.00Was: $121.95 -
On Sale
PROX Piston Kit 01.2020.100
PROX
MSRP: $121.95Now: $85.00Was: $121.95Factory piston wear is one of the most common reasons for lost compression, power, and reliability in high-mileage engines. The PROX Piston Kit 01.2020.100 restores your engine to OEM specifications...PX4194- SKU:
- PX4194
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
- BORE SIZE METRIC:
- 65.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 65.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON KIT
MSRP: $121.95Now: $85.00Was: $121.95 -
On Sale
PROX Piston Kit 01.2020.125
PROX
MSRP: $99.95Now: $85.00Was: $99.95When your engine demands precise combustion and reliable performance cycle after cycle, OEM-spec pistons are non-negotiable. The PROX Piston Kit 01.2020.125 delivers factory-engineered reliability...PX4195- SKU:
- PX4195
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- PISTON SIZE METRIC:
- +1.25 MM
- PISTON DIAMETER METRIC:
- 65.25 MM
- PRODUCT NAME:
- PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- BORE SIZE METRIC:
- 65.25 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
MSRP: $99.95Now: $85.00Was: $99.95 -
On Sale
PROX Piston Kit 01.2020.150
PROX
MSRP: $121.95Now: $85.00Was: $121.95When your engine demands reliability and precision, OEM-quality pistons are non-negotiable. The PROX Piston Kit 01.2020.150 delivers exact fitment and performance specifications without compromise,...PX4196- SKU:
- PX4196
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- RIDING STYLE:
- STREET
- PISTON DIAMETER METRIC:
- 65.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE SIZE METRIC:
- 65.50 MM
- PISTON SIZE METRIC:
- +1.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $121.95Now: $85.00Was: $121.95 -
On Sale
PROX Ring Set 02.2020.150
PROX
MSRP: $49.47Now: $42.00Was: $49.47Piston rings are critical to engine sealing and compression integrity—worn or damaged rings will result in blow-by, oil consumption, and power loss. The PROX Ring Set 02.2020.150 delivers...PX4196R- SKU:
- PX4196R
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
MSRP: $49.47Now: $42.00Was: $49.47 -
On Sale
PROX Piston Kit 01.4221.A
PROX
MSRP: $105.95Now: $90.00Was: $105.95Engine reliability starts with precision internal components—and PROX pistons are engineered to exacting OEM standards without compromise. If you're rebuilding an engine or replacing worn internals,...PX4221A- SKU:
- PX4221A
- Availability:
- Ships Same Business Day
- Weight:
- 0.42 LBS
- BORE SIZE METRIC:
- 53.96 MM
- PISTON SIZE METRIC:
- STANDARD SIZE A
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 53.96 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
MSRP: $105.95Now: $90.00Was: $105.95Qty in Cart: 0Quantity:Price:MSRP: $105.95Now: $90.00Was: $105.95Subtotal:
