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
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Wiseco CR500R 1984-2000 Ring Set 3544TD
WISECO
$57.95Engine ring sets are critical to combustion efficiency and longevity—they seal combustion pressure, control oil consumption, and manage heat dissipation. The Wiseco CR500R 3544TD is engineered to OEM...3544TD- SKU:
- 3544TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- BORE SIZE METRIC:
- 90.00 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$57.95Qty in Cart: 0Quantity:Price:$57.95Subtotal: -
Wiseco 91.00mm Piston Ring Set for 1984-2001 Honda CR500R 1982-1983 Honda CR480R 3583TD
WISECO
$49.56Piston rings are critical to engine sealing and combustion efficiency—worn or improper rings lead to blow-by, power loss, and accelerated engine wear. The Wiseco 3583TD ring set delivers...3583TD- SKU:
- 3583TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 91.00 MM
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$49.56 -
Wiseco 88.50mm Ring Set for Yamaha YZ490 1982-1990 3484TD
WISECO
$49.56A worn or damaged ring set compromises compression, increases blow-by, and kills both power and fuel economy. The Wiseco 3484TD delivers precision-engineered sealing geometry built specifically for...3484TD- SKU:
- 3484TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- BORE SIZE METRIC:
- 88.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$49.56 -
Wiseco Ring Set 88mm Honda TRX400EX 1999-2008 3465XC
WISECO
$49.95If you're running a Honda TRX400EX, piston ring wear is one of the most common culprits behind loss of compression and power delivery. The Wiseco Ring Set 3465XC restores proper ring seal and...3465XC- SKU:
- 3465XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 88.00 MM
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco 76mm Piston Ring Set for Honda TRX300 FourTrax 1988-2000 2992XC
WISECO
$49.95Worn or damaged piston rings kill compression, increase blowby, and tank your Honda TRX300's power output. The Wiseco 2992XC ring set restores proper sealing and reduces friction losses, delivering...2992XC- SKU:
- 2992XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 76.00 MM
- UNITS:
- SET
- RIDING STYLE:
- ATV
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco Piston Ring Set 76mm Bore for 2008-2016 Honda CBR1000RR 2992XG
WISECO
$49.95Piston rings are critical to engine sealing and compression—worn or substandard rings lead to blow-by, lost power, and accelerated wear on cylinder walls. The Wiseco 2992XG ring set delivers...2992XG- SKU:
- 2992XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 76.00 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- STREET
- PISTON MATERIAL:
- ALUMINUM
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco Ring Set 73.50mm Honda XR250R 1986-2004 2894XC
WISECO
$52.95Proper ring sealing is critical to engine efficiency and longevity—worn or inadequate rings allow compression loss and increased blow-by, robbing your XR250R of power and damaging your engine oil...2894XC- SKU:
- 2894XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- STREET
- UNITS:
- SET
- BORE SIZE METRIC:
- 73.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 250 CC
$52.95 -
Wiseco 73mm Piston Ring Set for Kawasaki KZ1000 1977-1983 2874XC
WISECO
$52.95Worn or damaged piston rings are a silent killer of engine performance—they'll cost you compression, fuel efficiency, and horsepower without you even knowing it. The Wiseco 2874XC ring set restores...2874XC- SKU:
- 2874XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PISTON MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 73.00 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$52.95 -
WISECO Ring Set 2913CD
WISECO
$49.95Ring sets are critical to engine performance—they seal combustion pressure, control oil consumption, and directly impact horsepower delivery and engine longevity. The Wiseco 2913CD offers precision...2913CD- SKU:
- 2913CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 244 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- SNOW
- UNITS:
- SET
- BORE SIZE METRIC:
- 74.00 MM
- PISTON MATERIAL:
- ALUMINUM
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco Piston for Arctic Cat 600 2000-2002 2084M06800
WISECO
$144.95Stock pistons wear out—especially in high-demand snowmobile engines. The Wiseco 2084M06800 delivers the precision engineering and durability you need to restore lost compression, regain peak power,...2084M06800- SKU:
- 2084M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 67.92 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 436 CC
- STROKE LENGTH METRIC:
- 60.00 MM
- BORE SIZE METRIC:
- 68.00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- SNOW
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
$144.95 -
Wiseco Piston Kit 48.50mm Bore 9.7:1 Compression Ratio 4665M04850
WISECO
$154.95The Wiseco 4665M04850 Piston Kit delivers the precision engineering your 4-stroke engine needs for consistent power and longevity, whether you're pushing hard on the track or tackling demanding trail...09100325- SKU:
- 09100325
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 83 CC
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 45.00 MM
- BORE SIZE METRIC:
- 48.50 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$154.95Qty in Cart: 0Quantity:Price:$154.95Subtotal: -
Wiseco Piston Kit 53.5mm Bore Honda XR100R 1985-2003 4666M05350
WISECO
$160.95If you're running a Honda XR100R and want to reliably extract more power without sacrificing engine longevity, a quality piston kit is non-negotiable. The Wiseco 4666M05350 replaces worn or damaged...09100328- SKU:
- 09100328
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE SIZE METRIC:
- 53.50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.4:1
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 4-STROKE
- BORE - OVERSIZE:
- +0,50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 101,00 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- UNITS:
- EACH
$160.95Qty in Cart: 0Quantity:Price:$160.95Subtotal: -
Wiseco Piston Kit 76mm 13.5:1 Compression for KTM 250 SX-F 2006-2012 40006M07600
WISECO
$279.95A worn piston compromises combustion efficiency and throttle response—exactly what you can't afford in competitive racing or high-demand trail riding. The Wiseco 40006M07600 delivers the compression...09100848- SKU:
- 09100848
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- DISPLACEMENT:
- 262,80 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- DISPLACEMENT:
- 249,5 CC
- BORE SIZE METRIC:
- 76.00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.0:1
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- STREET
$279.95Qty in Cart: 0Quantity:Price:$279.95Subtotal: -
Wiseco Piston Kit 97mm 12.2:1 Compression for 2007-2012 KTM 450 SX-F 4937M09700
WISECO
$254.95If you're running a 2007-2012 KTM 450 SX-F and need to restore or upgrade your top-end, the Wiseco 4937M09700 piston kit delivers the precision fit and proven durability that serious riders depend on...09100850- SKU:
- 09100850
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 97.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- DISPLACEMENT:
- 449 CC
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- MOLY COATED
$254.95Qty in Cart: 0Quantity:Price:$254.95Subtotal: -
Wiseco Honda CR250R 2002-2004 Piston Kit with Gaskets PK1196
WISECO
$259.95If you're rebuilding your CR250R top-end or looking to restore lost compression and power, the Wiseco PK1196 delivers the precision engineering that separates a proper rebuild from a Band-Aid fix...09030542- SKU:
- 09030542
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- +1,10 MM
- BORE - OVERSIZE METRIC:
- +1.10 MM
- PISTON DIAMETER METRIC:
- 67.46 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 249 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- TYPE:
- TOP END
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 72.00 MM
$259.95Qty in Cart: 0Quantity:Price:$259.95Subtotal: -
Wiseco Piston Kit Standard 77mm 13.4:1 Compression Ratio for Suzuki RM-Z250 2007-2009 4921M07700
WISECO
$224.95If you're running a 2007-2009 Suzuki RM-Z250 and want measurable gains in throttle response and mid-range torque, a quality piston kit is non-negotiable. The Wiseco 4921M07700 delivers the...09100852- SKU:
- 09100852
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 53.60 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.4:1
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- MOLY COATED
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit with Gaskets for Suzuki RM125 1991-1996 55.50mm PK1321
WISECO
$234.95A worn top-end is a performance killer on any 2-stroke—compression drops, power fades, and reliability suffers. The Wiseco PK1321 gives you everything needed for a complete, professional-grade...09030548- SKU:
- 09030548
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE METRIC:
- +1.50 MM
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 55.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 55.46 MM
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +1,50 MM
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 54.00 MM
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$234.95 -
Wiseco Piston Kit for Honda CRF250R 2004-2007 CRF250X 2004-2009 2012-2017 PK1236
WISECO
$326.95When your Honda CRF250R or CRF250X's top-end reaches its limits, a quality rebuild kit is essential to restore compression, throttle response, and reliability. The Wiseco PK1236 delivers OEM-quality...09030553- SKU:
- 09030553
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 249 CC
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
- STROKE LENGTH METRIC:
- 52.20 MM
- BORE SIZE METRIC:
- 78.00 MM
- PISTON DIAMETER METRIC:
- 77.95 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- COMPRESSION RATIO IMPERIAL:
- 12.9:1
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- TYPE:
- TOP END
- UNITS:
- KIT
$326.95Qty in Cart: 0Quantity:Price:$326.95Subtotal: -
Wiseco Piston Kit 54mm Standard Bore Honda CR125R 1995-2003 762M05400
WISECO
$190.95If you're running a Honda CR125R in competitive racing or demanding trail conditions, piston wear directly impacts your power delivery and engine reliability. The Wiseco 762M05400 GP Series kit...09100729- SKU:
- 09100729
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- ENGINE TYPE:
- 2-STROKE
- STROKE LENGTH METRIC:
- 54.50 MM
$190.95Qty in Cart: 0Quantity:Price:$190.95Subtotal: -
Wiseco Piston Kit 56mm Bore Gas Gas EC 125 2002-2007 Honda CR125R 1995-2003 Yamaha YZ125 1997-2004 762M05600
WISECO
$199.95When you're pushing a 125cc 2-stroke to its limits, your piston is doing the heavy lifting—and OEM units simply can't handle sustained high-RPM demands. The Wiseco 762M05600 GP Series delivers the...09100730- SKU:
- 09100730
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 56.00 MM
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +2.00 MM
- DISPLACEMENT:
- 134 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 54.50 MM
$199.95Qty in Cart: 0Quantity:Price:$199.95Subtotal:
