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Dirt Bike Engine

Dirt Bike Engine

Dirt Bike Engine

Dirt Bike Engine Parts at JJ Motorsports

Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.

Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.

Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!

  • Product
  • Qty in Cart
  • Quantity
  • Price
  • Subtotal
  • On Sale
    Wiseco Piston Kit Honda CRF450R 2017 4979M09600

    Wiseco Piston Kit Honda CRF450R 2017 4979M09600

    WISECO

    MSRP: $269.95
    Now: $229.00
    Was: $269.95
    Wiseco 4979M09600 Piston Kit Unleash the true potential of your Honda CRF450R with the Wiseco 4979M09600 Piston Kit. Crafted for performance enthusiasts, this kit combines cutting-edge technology with robust materials to elevate your riding experience...
    09102934
    SKU:
    09102934
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    COMPRESSION RATIO IMPERIAL:
    13.0:1
    DISPLACEMENT:
    449 CC
    PISTON MATERIAL:
    FORGED
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    96.00 MM
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    62.10 MM
    MSRP: $269.95
    Now: $229.00
    Was: $269.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $269.95
    Now: $229.00
    Was: $269.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit Kawasaki KX250F 2015-2016 77.00mm 13.8:1 Compression 40124M07700

    Wiseco Piston Kit Kawasaki KX250F 2015-2016 77.00mm 13.8:1 Compression 40124M07700

    WISECO

    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Wiseco 40124M07700 Piston Kit Elevate your Kawasaki KX250F's performance with the Wiseco 40124M07700 Piston Kit, meticulously engineered for riders who demand peak performance and reliability. This premium piston kit is designed to enhance your bike's...
    09103915
    SKU:
    09103915
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    STROKE LENGTH METRIC:
    53.60 MM
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    13.8:1
    DISPLACEMENT:
    250 CC
    ENGINE TYPE:
    4-STROKE
    BORE SIZE METRIC:
    77.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Subtotal:
  • On Sale
    Wiseco 95mm 12.5:1 Piston Kit for 2012-2016 KTM 500 EXC 40131M09500

    Wiseco 95mm 12.5:1 Piston Kit for 2012-2016 KTM 500 EXC 40131M09500

    WISECO

    MSRP: $284.95
    Now: $242.00
    Was: $284.95
    Wiseco 40131M09500 Piston Kit Elevate your motorcycle's performance with the Wiseco 40131M09500 Piston Kit. This premium upgrade is meticulously designed for riders seeking enhanced power, durability, and efficiency across all terrains. Experience...
    09103919
    SKU:
    09103919
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    BORE SIZE METRIC:
    95.00 MM
    STROKE LENGTH METRIC:
    72.00 MM
    PISTON MATERIAL:
    FORGED
    DISPLACEMENT:
    510 CC
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PRODUCT NAME:
    PISTON
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    EACH
    MSRP: $284.95
    Now: $242.00
    Was: $284.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $284.95
    Now: $242.00
    Was: $284.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit 95mm 11.8:1 Compression for KTM 450 XC-W 2012–2016 40091M09500

    Wiseco Piston Kit 95mm 11.8:1 Compression for KTM 450 XC-W 2012–2016 40091M09500

    WISECO

    MSRP: $254.95
    Now: $217.00
    Was: $254.95
    Wiseco 40091M09500 Piston Kit Transform your riding experience with the Wiseco 40091M09500 Piston Kit, meticulously crafted for performance enthusiasts. This advanced piston kit is engineered to deliver unmatched power and responsiveness, making it the...
    09103927
    SKU:
    09103927
    Availability:
    Ships Same Business Day
    Weight:
    0.90 LBS
    COMPRESSION RATIO IMPERIAL:
    11.8:1
    DISPLACEMENT:
    510 CC
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    4-STROKE
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    63.40 MM
    BORE SIZE METRIC:
    88.00 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    MSRP: $254.95
    Now: $217.00
    Was: $254.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $254.95
    Now: $217.00
    Was: $254.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit KTM 250 EXC 2000-2005 66.40mm 857M06640

    Wiseco Piston Kit KTM 250 EXC 2000-2005 66.40mm 857M06640

    WISECO

    MSRP: $184.95
    Now: $157.00
    Was: $184.95
    Wiseco 857M06640 Pro-Lite Piston Kit Elevate your KTM 250 EXC or KTM 250 MXC with the Wiseco 857M06640 Pro-Lite Piston Kit, meticulously crafted for those who seek unparalleled performance. This high-performance piston kit combines cutting-edge...
    09103962
    SKU:
    09103962
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    ENGINE TYPE:
    2-STROKE
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    BORE SIZE METRIC:
    66.40 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    DISPLACEMENT:
    249 CC
    STROKE LENGTH METRIC:
    72.00 MM
    MSRP: $184.95
    Now: $157.00
    Was: $184.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $184.95
    Now: $157.00
    Was: $184.95
    Subtotal:
  • On Sale
    Wiseco YZ85 2002-2018 Racer Elite Piston Kit RE900M04850

    Wiseco YZ85 2002-2018 Racer Elite Piston Kit RE900M04850

    WISECO

    MSRP: $127.98
    Now: $109.00
    Was: $127.98
    Experience unparalleled performance with the WISECO Racer Elite Piston Kit, engineered for the most demanding 2-stroke applications. Crafted from advanced 2000 Series alloy, this piston delivers exceptional strength and durability, ensuring optimal...
    09105118
    SKU:
    09105118
    Availability:
    Ships Same Business Day
    Weight:
    0.35 LBS
    BORE SIZE METRIC:
    48.50 MM
    BORE - OVERSIZE:
    +1,00 MM
    BORE - OVERSIZE METRIC:
    +1.00 MM
    PISTON MATERIAL:
    2000 SERIES ALLOY
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    RACER ELITE
    UNITS:
    KIT
    ENGINE TYPE:
    2-STROKE
    PRODUCT NAME:
    PISTON KIT
    SKIRT COATING:
    ARMORFIT™
    PISTON MATERIAL:
    FORGED
    MSRP: $127.98
    Now: $109.00
    Was: $127.98
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $127.98
    Now: $109.00
    Was: $127.98
    Subtotal:
  • On Sale
    Wiseco Piston Kit 54mm 9.4:1 Compression Honda CRF100F 2004-2013 PK1230

    Wiseco Piston Kit 54mm 9.4:1 Compression Honda CRF100F 2004-2013 PK1230

    WISECO

    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Wiseco PK1230 Piston Kit Elevate your Honda XR/CRF100's performance with the Wiseco PK1230 Piston Kit. This precision-engineered kit is tailored for riders seeking exceptional durability and enhanced power, making it the perfect upgrade for models from...
    09030180
    SKU:
    09030180
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    BORE - OVERSIZE:
    +1,00 MM
    BORE - OVERSIZE METRIC:
    +1.00 MM
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    NON-COATED
    DISPLACEMENT:
    99.2 CC
    RIDING STYLE:
    OFF-ROAD
    UNITS:
    KIT
    BORE SIZE METRIC:
    54.00 MM
    COMPRESSION RATIO IMPERIAL:
    9.4:1
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    TOP END
    ENGINE TYPE:
    4-STROKE
    PISTON DIAMETER METRIC:
    53.97 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    45.00 MM
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit with Gaskets Yamaha YZ85 2002-2022 PK1205

    Wiseco Piston Kit with Gaskets Yamaha YZ85 2002-2022 PK1205

    WISECO

    MSRP: $179.95
    Now: $153.00
    Was: $179.95
    Wiseco PK1205 Piston Kit Elevate your Yamaha YZ85's performance with the Wiseco PK1205 Piston Kit, meticulously crafted to enhance durability and power. Designed for models from 2002 to 2018, this comprehensive kit ensures your engine operates at its...
    09030194
    SKU:
    09030194
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    DISPLACEMENT:
    85 CC
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    49.45 MM
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    PISTON SIZE METRIC:
    +2.00 MM
    BORE - OVERSIZE METRIC:
    +2.00 MM
    MODEL:
    PRO-LITE
    PRODUCT NAME:
    REBUILD KIT
    TYPE:
    TOP END
    BORE - OVERSIZE:
    +2,00 MM
    BORE SIZE METRIC:
    49.50 MM
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    47.80 MM
    UNITS:
    KIT
    SKIRT COATING:
    NON-COATED
    MSRP: $179.95
    Now: $153.00
    Was: $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $179.95
    Now: $153.00
    Was: $179.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit 53.5mm Bore Honda CRF100F 2004-2008 PK1229

    Wiseco Piston Kit 53.5mm Bore Honda CRF100F 2004-2008 PK1229

    WISECO

    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Wiseco PK1229 Piston Kit Elevate your Honda CRF100F's performance with the Wiseco PK1229 Piston Kit, expertly engineered for riders who demand excellence. This comprehensive kit not only enhances engine efficiency but also promises long-lasting...
    09030199
    SKU:
    09030199
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    DISPLACEMENT:
    99.2 CC
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    BORE SIZE METRIC:
    53.50 MM
    COMPRESSION RATIO IMPERIAL:
    9.4:1
    MODEL:
    FORGED SERIES
    PISTON DIAMETER METRIC:
    53.47 MM
    PRODUCT NAME:
    REBUILD KIT
    STROKE LENGTH METRIC:
    45.00 MM
    TYPE:
    TOP END
    BORE - OVERSIZE:
    +0,50 MM
    BORE - OVERSIZE METRIC:
    +0.50 MM
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Subtotal:
  • On Sale
    Wiseco Honda CR250R 1986-1989 Piston Kit with Gaskets PK1243

    Wiseco Honda CR250R 1986-1989 Piston Kit with Gaskets PK1243

    WISECO

    MSRP: $264.95
    Now: $225.00
    Was: $264.95
    Wiseco PK1243 Piston Kit with Gaskets Elevate your Honda CR250R's performance with the Wiseco PK1243 Piston Kit, meticulously crafted for enthusiasts seeking top-tier quality and efficiency. Designed specifically for models from 1986 to 1989, this kit...
    09030273
    SKU:
    09030273
    Availability:
    Ships Same Business Day
    Weight:
    1.55 LBS
    BORE SIZE METRIC:
    66.40 MM
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    66.36 MM
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    DISPLACEMENT:
    249 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    72.00 MM
    PRODUCT NAME:
    REBUILD KIT
    MSRP: $264.95
    Now: $225.00
    Was: $264.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $264.95
    Now: $225.00
    Was: $264.95
    Subtotal:
  • On Sale
    Wiseco Suzuki RM125 1991-1996 Piston Kit with Gaskets PK1318

    Wiseco Suzuki RM125 1991-1996 Piston Kit with Gaskets PK1318

    WISECO

    MSRP: $209.95
    Now: $178.00
    Was: $209.95
    Wiseco PK1318 Piston Kit Elevate your riding experience with the Wiseco PK1318 Piston Kit, meticulously engineered for Suzuki RM125 models from 1991 to 1996. This kit promises to enhance your bike's performance and reliability, making it the ideal choice...
    09030279
    SKU:
    09030279
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    PISTON DIAMETER METRIC:
    53.96 MM
    PRODUCT NAME:
    REBUILD KIT
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    54.00 MM
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    NON-COATED
    BORE SIZE METRIC:
    54.00 MM
    DISPLACEMENT:
    123 CC
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    KIT
    MSRP: $209.95
    Now: $178.00
    Was: $209.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $209.95
    Now: $178.00
    Was: $209.95
    Subtotal:
  • On Sale
    Wiseco Yamaha PW50 1985-2025 Piston Kit with Gaskets PK1159

    Wiseco Yamaha PW50 1985-2025 Piston Kit with Gaskets PK1159

    WISECO

    MSRP: $149.95
    Now: $127.00
    Was: $149.95
    Wiseco PK1159 Piston Kit Elevate your riding experience with the Wiseco PK1159 Piston Kit, specifically engineered for Yamaha PW50 models spanning from 1981 to 2022. This premium piston kit ensures optimal performance and reliability, making it an...
    09030281
    SKU:
    09030281
    Availability:
    Ships Same Business Day
    Weight:
    0.93 LBS
    PISTON MATERIAL:
    FORGED
    PRODUCT NAME:
    REBUILD KIT
    BORE - OVERSIZE:
    +0,50 MM
    PISTON MATERIAL:
    ALUMINUM
    UNITS:
    EACH
    BORE SIZE METRIC:
    40.50 MM
    COOLING SYSTEM:
    LIQUID COOLED
    BORE - OVERSIZE METRIC:
    +0.50 MM
    DISPLACEMENT:
    49 CC
    MODEL:
    RACER'S CHOICE
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH METRIC:
    39.20 MM
    TYPE:
    TOP END
    MSRP: $149.95
    Now: $127.00
    Was: $149.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $149.95
    Now: $127.00
    Was: $149.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit with Gaskets for Honda CR125R 2000 PK1257

    Wiseco Piston Kit with Gaskets for Honda CR125R 2000 PK1257

    WISECO

    MSRP: $219.95
    Now: $187.00
    Was: $219.95
    Elevate your riding experience with the Wiseco PK1257 Pro-Lite Piston Kit, meticulously designed for optimal performance and reliability. Perfectly suited for the 2000 Honda CR125R, this kit ensures your engine runs smoothly and efficiently, whether on...
    09030284
    SKU:
    09030284
    Availability:
    Ships Same Business Day
    Weight:
    0.65 LBS
    PRODUCT NAME:
    REBUILD KIT
    STROKE LENGTH METRIC:
    54.50 MM
    DISPLACEMENT:
    125 CC
    MODEL:
    PRO-LITE
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    PISTON DIAMETER METRIC:
    53.95 MM
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    BORE SIZE METRIC:
    54.00 MM
    ENGINE TYPE:
    2-STROKE
    TYPE:
    TOP END
    MSRP: $219.95
    Now: $187.00
    Was: $219.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $219.95
    Now: $187.00
    Was: $219.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit with Gaskets for Kawasaki KX80 1998-2000 PK1150

    Wiseco Piston Kit with Gaskets for Kawasaki KX80 1998-2000 PK1150

    WISECO

    MSRP: $179.95
    Now: $153.00
    Was: $179.95
    Transform your Kawasaki KX80 with the Wiseco Piston Kit PK1150, designed for riders who seek unparalleled performance and reliability. This high-performance kit enhances your bike’s power output, ensuring a thrilling ride whether on the track or trails...
    09030289
    SKU:
    09030289
    Availability:
    Ships Same Business Day
    Weight:
    0.60 LBS
    MODEL:
    PRO-LITE
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    DISPLACEMENT:
    82 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    45.80 MM
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    BORE SIZE METRIC:
    48.00 MM
    PISTON DIAMETER METRIC:
    47.95 MM
    PRODUCT NAME:
    REBUILD KIT
    MSRP: $179.95
    Now: $153.00
    Was: $179.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $179.95
    Now: $153.00
    Was: $179.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit 54.50mm Yamaha YZ125 1998-2000 PK1174

    Wiseco Piston Kit 54.50mm Yamaha YZ125 1998-2000 PK1174

    WISECO

    MSRP: $209.95
    Now: $178.00
    Was: $209.95
    Elevate your Yamaha YZ125's performance with the Wiseco Performance Piston Kit PK1174. Designed for serious riders, this kit enhances engine efficiency and responsiveness, ensuring you dominate on both the track and trails. Precision CNC Machining:...
    09030291
    SKU:
    09030291
    Availability:
    Ships Same Business Day
    Weight:
    0.95 LBS
    BORE - OVERSIZE:
    +0,50 MM
    BORE - OVERSIZE METRIC:
    +0.50 MM
    BORE SIZE METRIC:
    54.50 MM
    MODEL:
    PRO-LITE
    PISTON DIAMETER METRIC:
    54.45 MM
    RIDING STYLE:
    OFF-ROAD
    TYPE:
    TOP END
    UNITS:
    KIT
    DISPLACEMENT:
    124 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    STROKE LENGTH METRIC:
    54.50 MM
    ENGINE TYPE:
    2-STROKE
    SKIRT COATING:
    NON-COATED
    PRODUCT NAME:
    REBUILD KIT
    MSRP: $209.95
    Now: $178.00
    Was: $209.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $209.95
    Now: $178.00
    Was: $209.95
    Subtotal:
  • On Sale
    Wiseco Piston Honda CR250R 1978-1980 1.5mm 431M07150

    Wiseco Piston Honda CR250R 1978-1980 1.5mm 431M07150

    WISECO

    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Unlock the full potential of your Honda CR250R Elsinore or ATC250R with the Wiseco Piston Kit. Crafted for performance enthusiasts, this piston kit combines cutting-edge engineering with premium materials to ensure your engine runs smoothly and...
    431M07150
    SKU:
    431M07150
    Availability:
    Ships Same Business Day
    Weight:
    0.80 LBS
    BORE SIZE METRIC:
    71.50 MM
    DISPLACEMENT:
    248 CC
    PISTON MATERIAL:
    4032 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    BORE - OVERSIZE METRIC:
    +1.50 MM
    ENGINE TYPE:
    2-STROKE
    PISTON DIAMETER METRIC:
    71.45 MM
    PRODUCT NAME:
    PISTON KIT
    STROKE LENGTH METRIC:
    64.40 MM
    BORE - OVERSIZE:
    +1,50 MM
    MODEL:
    FORGED SERIES
    SKIRT COATING:
    NON-COATED
    UNITS:
    KIT
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $224.95
    Now: $191.00
    Was: $224.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit 68.50mm Oversize Yamaha IT 250 1983 515M06850

    Wiseco Piston Kit 68.50mm Oversize Yamaha IT 250 1983 515M06850

    WISECO

    MSRP: $204.95
    Now: $174.00
    Was: $204.95
    Unleash the full potential of your Yamaha with the Wiseco Performance Piston Kit. Engineered for extreme durability and high performance, this kit enhances your bike's capabilities, making it perfect for both competitive and recreational riders...
    515M06850
    SKU:
    515M06850
    Availability:
    Ships Same Business Day
    Weight:
    0.75 LBS
    BORE SIZE METRIC:
    68.50 MM
    DISPLACEMENT:
    246,8 CC
    BORE - OVERSIZE METRIC:
    +0.50 MM
    PISTON MATERIAL:
    ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    STROKE LENGTH:
    68,00 MM
    UNITS:
    EACH
    BORE - OVERSIZE:
    +0,50 MM
    PRODUCT NAME:
    PISTON
    PISTON MATERIAL:
    FORGED
    STROKE LENGTH METRIC:
    68.00 MM
    MSRP: $204.95
    Now: $174.00
    Was: $204.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $204.95
    Now: $174.00
    Was: $204.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit 96mm 12.5:1 Kawasaki KX450F 2009-2012 PK1841

    Wiseco Piston Kit 96mm 12.5:1 Kawasaki KX450F 2009-2012 PK1841

    WISECO

    MSRP: $309.95
    Now: $263.00
    Was: $309.95
    Transform your riding experience with the Wiseco Piston Kit, meticulously crafted to enhance the performance of your Kawasaki KX450F. This premium kit is designed to deliver exceptional power and durability, making it the perfect choice for serious...
    09030936
    SKU:
    09030936
    Availability:
    Ships Same Business Day
    Weight:
    1.55 LBS
    BORE SIZE METRIC:
    96.00 MM
    ENGINE TYPE:
    4-STROKE
    MODEL:
    FORGED SERIES
    TYPE:
    TOP END
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    449 CC
    PISTON DIAMETER METRIC:
    95.95 MM
    PRODUCT NAME:
    REBUILD KIT
    SKIRT COATING:
    ARMORGLIDE®
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    RIDING STYLE:
    OFF-ROAD
    COMPRESSION RATIO IMPERIAL:
    12.5:1
    STROKE LENGTH METRIC:
    62.10 MM
    UNITS:
    KIT
    MSRP: $309.95
    Now: $263.00
    Was: $309.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $309.95
    Now: $263.00
    Was: $309.95
    Subtotal:
  • On Sale
    Wiseco Honda CRF250R 2010-2013 Piston Kit with Gaskets PK1874

    Wiseco Honda CRF250R 2010-2013 Piston Kit with Gaskets PK1874

    WISECO

    MSRP: $274.95
    Now: $234.00
    Was: $274.95
    Elevate your Honda CRF250R's performance with the Wiseco Piston Kit PK1874, engineered for riders who demand the best. This high-performance kit not only enhances power output but also ensures reliability in the most challenging conditions, making every...
    09030940
    SKU:
    09030940
    Availability:
    Ships Same Business Day
    Weight:
    1.05 LBS
    DISPLACEMENT:
    249 CC
    PISTON DIAMETER METRIC:
    76.75 MM
    PRODUCT NAME:
    REBUILD KIT
    BORE SIZE METRIC:
    76.80 MM
    MODEL:
    FORGED SERIES
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    RIDING STYLE:
    OFF-ROAD
    SKIRT COATING:
    ARMORGLIDE®
    STROKE LENGTH METRIC:
    53.80 MM
    UNITS:
    KIT
    COMPRESSION RATIO IMPERIAL:
    13.2:1
    ENGINE TYPE:
    4-STROKE
    PISTON MATERIAL:
    2618 ALUMINUM ALLOY
    TYPE:
    TOP END
    MSRP: $274.95
    Now: $234.00
    Was: $274.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $274.95
    Now: $234.00
    Was: $274.95
    Subtotal:
  • On Sale
    Wiseco Piston Kit 87.90mm 2000-2003 Sea-Doo RX DI 716M08800

    Wiseco Piston Kit 87.90mm 2000-2003 Sea-Doo RX DI 716M08800

    WISECO

    MSRP: $174.95
    Now: $149.00
    Was: $174.95
    Wiseco Piston Kit - 716M08800 Elevate your Sea-Doo watercraft's performance with the Wiseco Piston Kit, designed for enthusiasts who seek unmatched power and reliability. This precision-engineered kit enhances engine efficiency and longevity, making it...
    716M08800
    SKU:
    716M08800
    Availability:
    Ships Same Business Day
    Weight:
    1.20 LBS
    BORE - OVERSIZE:
    STANDARD
    BORE - OVERSIZE METRIC:
    STANDARD
    DISPLACEMENT:
    951 CC
    PRODUCT NAME:
    PISTON
    UNITS:
    EACH
    BORE SIZE METRIC:
    88.00 MM
    PISTON MATERIAL:
    ALUMINUM
    RIDING STYLE:
    WATERCRAFT
    MSRP: $174.95
    Now: $149.00
    Was: $174.95
    Qty in Cart: 0
    Quantity:
    Price:
    MSRP: $174.95
    Now: $149.00
    Was: $174.95
    Subtotal:
  • Total: items /

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Dirt Bike Engine Parts

Keep your dirt bike running smoothly and prolong the life of its engine with essential general maintenance. But when parts start to break down, don't let it stop you from getting out on the trails! JJ Motorsports has all that you need for minor jobs like oil changes or major overhauls such as a complete rebuild - carrying top aftermarket brands . Get back in gear faster by shopping our full line of high-quality dirt bike engine parts here today at JJ Motorsports!

 

At JJ Motorsports, we want to make sure you don't miss out on the ride! If your motor has blown or radiator smashed, our gearheads can help get you back in the seat. We carry piston kits from top brands like Wiseco and Wrench Rabbit engine kits so that riders have access to a wide range of parts for their dirt bike engine rebuilds. Plus – with gaskets at-the-ready when it comes time for any leakages - no need to worry about maintenance issues either; simply stay up on oil & filter changes and let us take care of everything else. Got queries? Just give one of our knowledgeable staff members a call at 1-231‐767‐5055 where they'll be more than happy provide advice, instructions and tailored answers catered just for YOU!

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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