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
-
PROX Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FX 01.2448.A
PROX
$195.95Piston Kit - 96.95 mm - 01.2448.A High-performance piston kit designed for Yamaha WR450F/YZ450F/YZ450FX. Precision machined using advanced CNC technology for optimal fit and performance. ...09106781- SKU:
- 09106781
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
$195.95 -
PROX Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FX 01.2450.A
PROX
$214.95Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FX Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston...09106782- SKU:
- 09106782
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$214.95 -
PROX Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FX 01.2453.A
PROX
$214.95Piston Kit - 96.95 mm - Yamaha WR450F/YZ450F/YZ450FX - 01.2453.A High-performance piston kit designed for Yamaha WR450F/YZ450F/YZ450FX models. Includes essential components: piston, rings,...09106783- SKU:
- 09106783
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
$214.95 -
PROX Piston Kit - 85.95 mm - Yamaha 01.2918.A
PROX
$179.95Piston Kit - 85.95 mm - Yamaha Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by OEM...09106784- SKU:
- 09106784
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
$179.95 -
PROX Piston Kit - 92.94 mm - Yamaha Wolverine RMAX2/RMAX4 01.2921.A
PROX
$159.95Piston Kit - 92.94 mm - Yamaha Wolverine RMAX2/RMAX4 Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston...09106785- SKU:
- 09106785
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$159.95 -
PROX Piston Kit - 77.96 mm - Kawasaki KX250/KX250X 01.4353.A
PROX
$185.95Piston Kit - 77.96 mm - Kawasaki KX250/KX250X Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings...09106787- SKU:
- 09106787
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$185.95 -
PROX Piston Kit - 99.91 mm - Sea Doo GTX300/RXP300/RXT300 01.5596.A
PROX
$214.95Piston Kit - 99.91 mm - Sea Doo GTX300/RXP300/RXT300 Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston...09106788- SKU:
- 09106788
- Availability:
- Ships Same Business Day
- Weight:
- 1.42 LBS
$214.95 -
PROX Piston Kit - 79.95 mm - Polaris 01.5806.A
PROX
$134.95Piston Kit - 79.95 mm - Polaris Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by OEM...09106789- SKU:
- 09106789
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$134.95 -
PROX Piston Kit - 92.95 mm - Polaris 01.5913.A
PROX
$134.95Piston Kit - 92.95 mm - Polaris Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by OEM...09106790- SKU:
- 09106790
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
$134.95 -
PROX Piston Kit - 92.91 mm - Polaris RZR XP Turbo 01.5920.A
PROX
$195.95Piston Kit - 92.91 mm - Polaris RZR XP Turbo Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings...09106791- SKU:
- 09106791
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$195.95 -
PROX Piston Kit - 57.94 mm - Husqvarna TE150i | KTM 150EXC TPI 01.6241.A
PROX
$139.95Piston Kit - 57.94 mm - Husqvarna TE150i | KTM 150EXC TPI Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM...09106792- SKU:
- 09106792
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$139.95 -
PROX Steel Plate Set - Gas Gas/Husqvarna/KTM 16.S50013
PROX
$25.95Steel Plate Set - Gas Gas/Husqvarna/KTM Made to exact OEM specifications, offers maximum performance and durability, Complete steel plate set, allows for easy replacement, Can be used with other ProX...11313932- SKU:
- 11313932
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$25.95 -
PROX Steel Plate Set - Husqvarna/KTM 16.S51012
PROX
$25.95Steel Plate Set - Husqvarna/KTM Made to exact OEM specifications, offers maximum performance and durability, Complete steel plate set, allows for easy replacement, Can be used with other ProX OEM...11313933- SKU:
- 11313933
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$25.95 -
PROX Steel Plate Set - Gas Gas/Husqvarna/KTM 16.S51019
PROX
$49.95Steel Plate Set - 16.S51019 Engineered to meet exact OEM specifications Delivers maximum performance and durability for your bike Complete set of steel plates for hassle-free replacement Compatible...11313934- SKU:
- 11313934
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
$49.95 -
PROX Steel Plate Set - Gas Gas/Husqvarna/KTM 16.S53010
PROX
$39.95Steel Plate Set - 16.S53010 Engineered to meet exact OEM specifications for optimal performance Durable steel construction ensures longevity and reliability Complete set for hassle-free...11313935- SKU:
- 11313935
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$39.95 -
PROX Steel Plate Set - 125 SE-R 16.S71018
PROX
$65.95Steel Plate Set - 125 SE-R Made to exact OEM specifications, offers maximum performance and durability, Complete steel plate set, allows for easy replacement, Can be used with other ProX OEM clutch...11313936- SKU:
- 11313936
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$65.95 -
PROX Steel Plate Set - Sherco 16.S73018
PROX
$74.95Steel Plate Set - Sherco Made to exact OEM specifications, offers maximum performance and durability, Complete steel plate set, allows for easy replacement, Can be used with other ProX OEM clutch...11313937- SKU:
- 11313937
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
$74.95 -
PROX Piston Kit - 87.96 mm - Gas Gas | Husqvarna | KTM 01.6353.A
PROX
$229.73Piston Kit - 87.96 mm - Gas Gas | Husqvarna | KTM Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston...09106793- SKU:
- 09106793
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$229.73 -
PROX Piston Kit - 94.95 mm - Gas Gas | Husqvarna | KTM 01.6434.A
PROX
$214.95Piston Kit - 94.95 mm - Gas Gas | Husqvarna | KTM Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston...09106794- SKU:
- 09106794
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
$214.95 -
PROX Piston Kit - 94.95 mm - Husqvarna FE450 | KTM 450EXC-F 01.6440.A
PROX
$195.95Piston Kit - 94.95 mm - Husqvarna FE450 | KTM 450EXC-F Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment,...09106795- SKU:
- 09106795
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$195.95 -
PROX Piston Kit - 94.96 mm - Gas Gas | Husqvarna | KTM 01.6443.A
PROX
$214.95Piston Kit - 94.96 mm - Gas Gas | Husqvarna | KTM Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston...09106796- SKU:
- 09106796
- Availability:
- Ships Same Business Day
- Weight:
- 0.83 LBS
$214.95 -
PROX Piston Kit - 94.95 mm - Gas Gas | Husqvarna | KTM 01.6513.A
PROX
$214.95Piston Kit - 94.95 mm - 01.6513.A High-performance piston kit designed for Gas Gas, Husqvarna, and KTM motorcycles. Includes all essential components: piston, rings, wrist pin, circlips, and...09106797- SKU:
- 09106797
- Availability:
- Ships Same Business Day
- Weight:
- 0.78 LBS
$214.95 -
PROX Piston Kit - 66.34 mm - Beta RR250/Xtrainer 250 01.7313.A
PROX
$159.95Piston Kit - 66.34 mm - Beta RR250/Xtrainer 250 Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications,...09106798- SKU:
- 09106798
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
$159.95 -
PROX Piston Kit - 75.96 mm - Sherco 250SE-F/250SEF-R 01.7314.A
PROX
$209.99Piston Kit - 75.96 mm - Sherco 250SE-F/250SEF-R Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings...09106799- SKU:
- 09106799
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$209.99 -
PROX Piston Kit - 83.95 mm - Sherco 300SE-F/300SEF-R 01.7324.A
PROX
$209.95Piston Kit - 83.95 mm - Sherco 300SE-F/300SEF-R Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings...09106800- SKU:
- 09106800
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$209.95 -
PROX Piston Kit - 66.34 mm - Sherco 250SE/250SE-R 01.7334.A
PROX
$159.95Piston Kit - 66.34 mm - 01.7334.A OEM replacement designed specifically for Sherco 250SE/250SE-R models. Manufactured in Japan for superior quality and reliability. Crafted from...09106801- SKU:
- 09106801
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
$159.95 -
PROX Piston Kit - 66.34 mm - Sherco 250SE/250SE-R 01.7337.A
PROX
$159.95Piston Kit - 66.34 mm - Sherco 250SE/250SE-R 01.7337.A Precision-engineered for perfect fit and performance. Manufactured in Japan ensuring high-quality standards. Made from...09106802- SKU:
- 09106802
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$159.95 -
PROX Piston Kit - 71.94 mm - Sherco 300SE/300SE-R 01.7346.A
PROX
$199.95Piston Kit - 71.94 mm - Sherco 300SE/300SE-R Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then...09106803- SKU:
- 09106803
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
$199.95 -
PROX Piston Kit - 87.96 mm - Beta 350RR 01.7351.A
PROX
$209.95Piston Kit - 87.96 mm - 01.7351.A Precision machined for optimal performance Includes piston, rings, wrist pin, and circlips OEM-quality piston rings made to exact specifications ...09106804- SKU:
- 09106804
- Availability:
- Ships Same Business Day
- Weight:
- 0.69 LBS
$209.95 -
PROX Piston Kit - 87.96 mm - Beta 350RR 01.7355.A
PROX
$209.95Piston Kit - 87.96 mm - 01.7355.A High-performance piston kit designed for Beta 350RR. Includes piston, rings, wrist pin, circlips, and detailed instruction sheet. Precision machined...09106805- SKU:
- 09106805
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
$209.95 -
PROX Piston Kit - 87.96 mm - Beta 390RR 01.7365.A
PROX
$214.95Piston Kit - 87.96 mm - Beta 390RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by...09106806- SKU:
- 09106806
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$214.95 -
PROX Piston Kit - 94.95 mm - Beta 400RR 01.7411.A
PROX
$214.95Piston Kit - 94.95 mm - Beta 400RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by...09106808- SKU:
- 09106808
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
$214.95 -
PROX Piston Kit - 94.95 mm - Beta 450RR 01.7412.A
PROX
$214.95Piston Kit - 94.95 mm - Beta 450RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by...09106809- SKU:
- 09106809
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$214.95 -
PROX Piston Kit - 94.96 mm - Beta 430RR 01.7415.A
PROX
$214.95Piston Kit - 94.96 mm - Beta 430RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by...09106811- SKU:
- 09106811
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$214.95 -
PROX Piston Kit - 99.96 mm - Beta 480RR 01.7425.A
PROX
$214.95Piston Kit - 99.96 mm - Beta 480RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are made by...09106812- SKU:
- 09106812
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
$214.95 -
PROX Piston Kit - 99.95 mm - Beta 498RR/520RR 01.7512.A
PROX
$214.95Piston Kit - 99.95 mm - Beta 498RR/520RR Kit includes piston, rings, wrist pin, circlips and instruction sheet, The piston is precision machined on state of the art CNC equipment, Piston rings are...09106813- SKU:
- 09106813
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
$214.95 -
PROX Inner Clutch Hub - CRF250R/RX 18.1348
PROX
$89.95Inner Clutch Hub - CRF250R/RX Manufactured with OEM-specified aluminum, Precision cast and machined, Same as OEM replacement; fit both stock and aftermarket primary clutch baskets11321867- SKU:
- 11321867
- Availability:
- Ships Same Business Day
- Weight:
- 0.67 LBS
$89.95 -
PROX Inner Clutch Hub - CRF450X 18.1405
PROX
$79.95Inner Clutch Hub - CRF450X Manufactured with OEM-specified aluminum, Precision cast and machined, Same as OEM replacement; fit both stock and aftermarket primary clutch baskets11321868- SKU:
- 11321868
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
$79.95 -
PROX Inner Clutch Hub - CRF450R 18.1413
PROX
$89.95Inner Clutch Hub - CRF450R Manufactured with OEM-specified aluminum, Precision cast and machined, Same as OEM replacement; fit both stock and aftermarket primary clutch baskets11321869- SKU:
- 11321869
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
$89.95 -
PROX Inner Clutch Hub - CRF450L/R/X/RX 18.1417
PROX
$89.95Inner Clutch Hub - CRF450L/R/X/RX Manufactured with OEM-specified aluminum, Precision cast and machined, Same as OEM replacement; fit both stock and aftermarket primary clutch baskets11321870- SKU:
- 11321870
- Availability:
- Ships Same Business Day
- Weight:
- 0.87 LBS
$89.95
