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 or better specifications, making it the ideal choice...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
$57.95 -
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 precision-engineered sealing for CR500R and CR480R engines,...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 your YZ490, restoring cylinder integrity and maximizing...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 combustion efficiency, bringing your engine back to factory...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 measurable gains in engine efficiency and...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 precision-engineered sealing geometry and durable materials...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. The Wiseco 2894XC ring set restores factory sealing...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 proper bore sealing on your KZ1000, ensuring consistent...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 manufacturing that ensures consistent compression across...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, and keep your Arctic Cat 600 running reliably through...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 conditions. A 9.7:1 compression ratio maximizes...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
$154.95 -
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 pistons with a precision-engineered component that...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 ratio and durability required to extract maximum power...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. Wiseco's forged aluminum construction combined with...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
$254.95 -
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. This complete piston kit includes all gaskets and...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 compression ratio and forged construction that serious riders...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 rebuild in one kit, eliminating guesswork and getting you...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 components engineered to exacting tolerances—ensuring...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 delivers the precision machining and durable construction...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
$190.95 -
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 strength and precision you need to build reliable power...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:
