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PROX

PROX

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 - Standard - Yamaha YZ 65 01.2018.B

    PROX Piston Kit - Standard - Yamaha YZ 65 01.2018.B

    PROX

    $79.95
    Piston Kit for offroad applications
    09105695
    SKU:
    09105695
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    BORE - OVERSIZE:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE METRIC:
    STANDARD
    UNITS:
    KIT
    BORE SIZE METRIC:
    43.45 MM
    PRODUCT NAME:
    PISTON KIT
    $79.95
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • PROX Piston Kit - Standard - Yamaha YZ 65 01.2018.C

    PROX Piston Kit - Standard - Yamaha YZ 65 01.2018.C

    PROX

    $79.95
    Piston Kit for offroad applications
    09105696
    SKU:
    09105696
    Availability:
    Ships Same Business Day
    Weight:
    0.12 LBS
    BORE - OVERSIZE:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    43.46 MM
    PRODUCT NAME:
    PISTON KIT
    $79.95
    Qty in Cart: 0
    Quantity:
    Price:
    $79.95
    Subtotal:
  • PROX Piston Kit 01.3413.A

    PROX Piston Kit 01.3413.A

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102972
    SKU:
    09102972
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    95.96 MM
    PISTON DIAMETER METRIC:
    95.96 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.1343.C

    PROX Piston Kit 01.1343.C

    PROX

    $185.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104535
    SKU:
    09104535
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    PISTON DIAMETER METRIC:
    76.79 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    76.79 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $185.95
    Qty in Cart: 0
    Quantity:
    Price:
    $185.95
    Subtotal:
  • PROX Piston Kit 01.3341.A

    PROX Piston Kit 01.3341.A

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104539
    SKU:
    09104539
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    BORE SIZE METRIC:
    76.96 MM
    PISTON DIAMETER METRIC:
    76.96 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.3341.C

    PROX Piston Kit 01.3341.C

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104541
    SKU:
    09104541
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    PISTON DIAMETER METRIC:
    76.98 MM
    BORE SIZE METRIC:
    76.98 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4342.A

    PROX Piston Kit 01.4342.A

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104542
    SKU:
    09104542
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    BORE SIZE METRIC:
    76.96 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    76.96 MM
    RIDING STYLE:
    OFF-ROAD
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4342.B

    PROX Piston Kit 01.4342.B

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104543
    SKU:
    09104543
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    BORE SIZE METRIC:
    76.97 MM
    PRODUCT NAME:
    PISTON KIT
    PISTON DIAMETER METRIC:
    76.97 MM
    PISTON SIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.6029.D

    PROX Piston Kit 01.6029.D

    PROX

    $59.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104545
    SKU:
    09104545
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    44.99 MM
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    44.99 MM
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • PROX Piston Kit 01.6226.A

    PROX Piston Kit 01.6226.A

    PROX

    $124.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104546
    SKU:
    09104546
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    53.94 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    53.94 MM
    $124.95
    Qty in Cart: 0
    Quantity:
    Price:
    $124.95
    Subtotal:
  • PROX Piston Kit 01.6226.B

    PROX Piston Kit 01.6226.B

    PROX

    $124.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104547
    SKU:
    09104547
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    PISTON SIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    53.95 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    BORE SIZE METRIC:
    53.95 MM
    $124.95
    Qty in Cart: 0
    Quantity:
    Price:
    $124.95
    Subtotal:
  • PROX Piston Kit 01.6226.C

    PROX Piston Kit 01.6226.C

    PROX

    $124.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09104548
    SKU:
    09104548
    Availability:
    Ships Same Business Day
    Weight:
    0.40 LBS
    PISTON DIAMETER METRIC:
    53.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    53.96 MM
    $124.95
    Qty in Cart: 0
    Quantity:
    Price:
    $124.95
    Subtotal:
  • PROX Piston Kit - MX/EC250 01.7307.B

    PROX Piston Kit - MX/EC250 01.7307.B

    PROX

    $159.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103246
    SKU:
    09103246
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    SKIRT COATING:
    MOLY COATED
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    66.34 MM
    PRODUCT NAME:
    PISTON KIT
    $159.95
    Qty in Cart: 0
    Quantity:
    Price:
    $159.95
    Subtotal:
  • PROX Piston Kit - 71.94 EC300 01.7300.A

    PROX Piston Kit - 71.94 EC300 01.7300.A

    PROX

    $199.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103248
    SKU:
    09103248
    Availability:
    Ships Same Business Day
    Weight:
    0.70 LBS
    PISTON DIAMETER METRIC:
    71.94 MM
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ATV
    RIDING STYLE:
    STREET
    PISTON MATERIAL:
    ALUMINUM ALLOY
    SKIRT COATING:
    MOLY COATED
    $199.95
    Qty in Cart: 0
    Quantity:
    Price:
    $199.95
    Subtotal:
  • PROX Piston Kit 01.6394.A

    PROX Piston Kit 01.6394.A

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103257
    SKU:
    09103257
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    RIDING STYLE:
    OFF-ROAD
    PISTON DIAMETER METRIC:
    71.94 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    71.94 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.6394.B

    PROX Piston Kit 01.6394.B

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103258
    SKU:
    09103258
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    BORE SIZE METRIC:
    71.95 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    PISTON DIAMETER METRIC:
    71.95 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.4413.A

    PROX Piston Kit 01.4413.A

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103266
    SKU:
    09103266
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    PISTON DIAMETER METRIC:
    95.97 MM
    PISTON SIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    95.97 MM
    PRODUCT NAME:
    PISTON KIT
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.4413.B

    PROX Piston Kit 01.4413.B

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103267
    SKU:
    09103267
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    PISTON DIAMETER METRIC:
    95.98 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    BORE SIZE METRIC:
    95.98 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.4413.C

    PROX Piston Kit 01.4413.C

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103268
    SKU:
    09103268
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    PISTON DIAMETER METRIC:
    95.99 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    BORE SIZE METRIC:
    95.99 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.6019.B

    PROX Piston Kit 01.6019.B

    PROX

    $59.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103270
    SKU:
    09103270
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    PISTON DIAMETER METRIC:
    39.47 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    39.47 MM
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • PROX Piston Kit 01.6019.C

    PROX Piston Kit 01.6019.C

    PROX

    $59.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103271
    SKU:
    09103271
    Availability:
    Ships Same Business Day
    Weight:
    0.20 LBS
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    BORE SIZE METRIC:
    39.48 MM
    PISTON DIAMETER METRIC:
    39.48 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON SIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • PROX Piston Kit - 71.94 TM300 01.7302.A

    PROX Piston Kit - 71.94 TM300 01.7302.A

    PROX

    $199.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103287
    SKU:
    09103287
    Availability:
    Ships Same Business Day
    Weight:
    0.70 LBS
    PRODUCT NAME:
    PISTON KIT
    PISTON DIAMETER METRIC:
    71.94 MM
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    MOLY COATED
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    $199.95
    Qty in Cart: 0
    Quantity:
    Price:
    $199.95
    Subtotal:
  • PROX Piston Kit 01.2414.B

    PROX Piston Kit 01.2414.B

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103421
    SKU:
    09103421
    Availability:
    Ships Same Business Day
    Weight:
    0.50 LBS
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    76.96 MM
    UNITS:
    EACH
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    76.96 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.2444.A

    PROX Piston Kit 01.2444.A

    PROX

    $195.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103423
    SKU:
    09103423
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    96.95 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    96.95 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    OFF-ROAD
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • PROX Piston Kit 01.2444.B

    PROX Piston Kit 01.2444.B

    PROX

    $195.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103424
    SKU:
    09103424
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    BORE SIZE METRIC:
    96.96 MM
    PISTON SIZE METRIC:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    96.96 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $195.95
    Qty in Cart: 0
    Quantity:
    Price:
    $195.95
    Subtotal:
  • PROX Piston Kit 01.4124.A

    PROX Piston Kit 01.4124.A

    PROX

    $94.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103429
    SKU:
    09103429
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    48.45 MM
    PISTON DIAMETER METRIC:
    48.45 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    $94.95
    Qty in Cart: 0
    Quantity:
    Price:
    $94.95
    Subtotal:
  • PROX Piston Kit 01.4124.B

    PROX Piston Kit 01.4124.B

    PROX

    $94.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103430
    SKU:
    09103430
    Availability:
    Ships Same Business Day
    Weight:
    0.30 LBS
    PISTON DIAMETER METRIC:
    48.46 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    48.46 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    $94.95
    Qty in Cart: 0
    Quantity:
    Price:
    $94.95
    Subtotal:
  • PROX Piston Kit 01.4124.C

    PROX Piston Kit 01.4124.C

    PROX

    $94.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103431
    SKU:
    09103431
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON DIAMETER METRIC:
    48.47 MM
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    48.47 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    PISTON SIZE METRIC:
    STANDARD
    UNITS:
    EACH
    $94.95
    Qty in Cart: 0
    Quantity:
    Price:
    $94.95
    Subtotal:
  • PROX Piston Kit - Beta RR300 01.7393.A

    PROX Piston Kit - Beta RR300 01.7393.A

    PROX

    $199.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103447
    SKU:
    09103447
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    KIT
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    SKIRT COATING:
    MOLY COATED
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    71.94 MM
    $199.95
    Qty in Cart: 0
    Quantity:
    Price:
    $199.95
    Subtotal:
  • PROX Piston Kit 01.1480.000

    PROX Piston Kit 01.1480.000

    PROX

    $99.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102455
    SKU:
    09102455
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    78.50 MM
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    78.50 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ATV
    $99.95
    Qty in Cart: 0
    Quantity:
    Price:
    $99.95
    Subtotal:
  • PROX Piston Kit 01.1480.050

    PROX Piston Kit 01.1480.050

    PROX

    $99.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102456
    SKU:
    09102456
    Availability:
    Ships Same Business Day
    Weight:
    0.79 LBS
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    79.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    BORE SIZE METRIC:
    79.00 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $99.95
    Qty in Cart: 0
    Quantity:
    Price:
    $99.95
    Subtotal:
  • PROX Piston Kit 01.1480.100

    PROX Piston Kit 01.1480.100

    PROX

    $99.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102457
    SKU:
    09102457
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    79.50 MM
    PISTON DIAMETER METRIC:
    79.50 MM
    $99.95
    Qty in Cart: 0
    Quantity:
    Price:
    $99.95
    Subtotal:
  • PROX Piston Kit 01.1498.200

    PROX Piston Kit 01.1498.200

    PROX

    $109.45
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102474
    SKU:
    09102474
    Availability:
    Ships Same Business Day
    Weight:
    1.15 LBS
    BORE SIZE METRIC:
    92 MM
    PISTON DIAMETER METRIC:
    92.00 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    RIDING STYLE:
    ATV
    UNITS:
    EACH
    PISTON SIZE METRIC:
    STANDARD
    $109.45
    Qty in Cart: 0
    Quantity:
    Price:
    $109.45
    Subtotal:
  • PROX Piston Kit 01.6029.B

    PROX Piston Kit 01.6029.B

    PROX

    $59.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102483
    SKU:
    09102483
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    BORE SIZE METRIC:
    44.97 MM
    PISTON SIZE METRIC:
    STANDARD
    PISTON DIAMETER METRIC:
    44.97 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • PROX Piston Kit 01.6029.C

    PROX Piston Kit 01.6029.C

    PROX

    $59.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102484
    SKU:
    09102484
    Availability:
    Ships Same Business Day
    Weight:
    0.25 LBS
    PISTON DIAMETER METRIC:
    44.98 MM
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    44.98 MM
    PISTON SIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    $59.95
    Qty in Cart: 0
    Quantity:
    Price:
    $59.95
    Subtotal:
  • PROX Piston Kit 01.4345.A

    PROX Piston Kit 01.4345.A

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103904
    SKU:
    09103904
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    BORE SIZE METRIC:
    76.96 MM
    PISTON DIAMETER METRIC:
    76.96 MM
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4345.B

    PROX Piston Kit 01.4345.B

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103905
    SKU:
    09103905
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    PISTON DIAMETER METRIC:
    76.97 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    76.97 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4345.C

    PROX Piston Kit 01.4345.C

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103906
    SKU:
    09103906
    Availability:
    Ships Same Business Day
    Weight:
    0.45 LBS
    BORE SIZE METRIC:
    76.98 MM
    PISTON SIZE METRIC:
    STANDARD
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON KIT
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    76.98 MM
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • PROX Piston Kit 01.4415.C

    PROX Piston Kit 01.4415.C

    PROX

    $189.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09103909
    SKU:
    09103909
    Availability:
    Ships Same Business Day
    Weight:
    0.85 LBS
    PISTON DIAMETER METRIC:
    95.99 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    BORE SIZE METRIC:
    95.99 MM
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    $189.95
    Qty in Cart: 0
    Quantity:
    Price:
    $189.95
    Subtotal:
  • PROX Piston Kit 01.2412.B

    PROX Piston Kit 01.2412.B

    PROX

    $179.95
    Manufactured in Japan and designed to be OEM replacement, Cast from a high-silicon-content aluminum alloy that meets or exceeds OEM specifications, then CNC-machined to extremely close tolerances,...
    09102733
    SKU:
    09102733
    Availability:
    Ships Same Business Day
    Weight:
    0.55 LBS
    PISTON SIZE METRIC:
    STANDARD
    PRODUCT NAME:
    PISTON KIT
    BORE SIZE METRIC:
    76.96 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    UNITS:
    EACH
    PISTON DIAMETER METRIC:
    76.96 MM
    RIDING STYLE:
    OFF-ROAD
    $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    $179.95
    Subtotal:
  • Total: items /

Adding your products to cart

Big Power, Nice Sound!

Picked up a Pro Circuit pipe and silencer for my YZ125 it’s a game changer. The power feels way better and the sound is awesome.

Tyler D. - 06/12

Perfect Fit

First time ordering here and dang y’all knocked it outta the park! The wheels fit my Ranger UTV perfect, and I’ll definitely be back for more 5 stars all day!

Sarah L. - 08/24

Fast Shipping!!

Ordered on a Monday, and it was on my doorstep by Wednesday! Super impressed with how fast the shipping was.

Jason P. - 09/13

Helps keep cool, works great!

Bought the dual pass Allstar radiator for my build, and it’s been solid. Keeps the engine running cool even on the hottest days no complaints here!

Jake M. - 05/21

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