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 Ring Set 56.00mm for Honda CR125R 1985-1986 2205CD
WISECO
$52.95Piston ring wear is one of the fastest ways to lose compression, power, and fuel efficiency in a two-stroke engine. The Wiseco Ring Set 2205CD delivers the precision fit and high-temperature...2205CD- SKU:
- 2205CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- DISPLACEMENT:
- 124 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
- BORE SIZE METRIC:
- 56.00 MM
- DISPLACEMENT:
- 120 CC
- DISPLACEMENT:
- 123 CC
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
$52.95Qty in Cart: 0Quantity:Price:$52.95Subtotal: -
Wiseco 56mm Ring Set for Yamaha YZ125 1989-2024 2205CS
WISECO
$25.95Piston ring sets are critical to engine longevity—they seal combustion pressure, regulate oil consumption, and prevent blow-by that robs power and damages your engine. The Wiseco 2205CS ring set is...2205CS- SKU:
- 2205CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- DISPLACEMENT:
- 124 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE SIZE METRIC:
- 56.00 MM
- DISPLACEMENT:
- 125 CC
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$25.95 -
Wiseco Ring Set 92.50mm Honda XR500R 1983-1984 3642XC
WISECO
$56.13Piston ring degradation is one of the most common culprits behind compression loss and increased blowby in vintage Honda two-strokes. The Wiseco Ring Set 3642XC delivers OEM-equivalent precision with...3642XC- SKU:
- 3642XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
- UNITS:
- SET
- BORE SIZE METRIC:
- 92.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- UTV
$56.13Qty in Cart: 0Quantity:Price:$56.13Subtotal: -
Wiseco 86.00mm Piston Ring Set for Kawasaki KX500 1988-2004 3386TD
WISECO
$57.95Running a stock piston ring set on your KX500 is a recipe for blow-by, oil consumption, and lost power—especially if you're pushing hard on the track or trail. The Wiseco 3386TD ring set delivers a...3386TD- SKU:
- 3386TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- BORE SIZE METRIC:
- 86.00 MM
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
$57.95Qty in Cart: 0Quantity:Price:$57.95Subtotal: -
Wiseco 87mm Ring Set for Honda XR400R 1996-2004 3425XC
WISECO
$52.95If you're rebuilding or hot-rodding your XR400R, ring seal directly impacts compression, fuel efficiency, and overall engine reliability. A worn or improper ring set leads to blow-by, loss of power,...3425XC- SKU:
- 3425XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 87.00 MM
- PISTON MATERIAL:
- ALUMINUM
$52.95 -
Wiseco Ring Set 86.50mm Kawasaki KX500 1988-2004 3405TD
WISECO
$57.95Worn or damaged piston rings are a silent killer of engine performance—they bleed compression, spike oil consumption, and rob you of power just when you need it most. The Wiseco Ring Set 3405TD...3405TD- SKU:
- 3405TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- BORE SIZE METRIC:
- 86.50 MM
- RIDING STYLE:
- ATV
- UNITS:
- SET
$57.95 -
Wiseco 80.50mm Ring Set for Arctic Cat Thundercat 900 1993-1997 3169TD
WISECO
$57.95Piston ring degradation is one of the fastest ways to lose compression and power in your Arctic Cat Thundercat 900. The Wiseco 3169TD Ring Set restores sealed combustion and cylinder wall contact,...3169TD- SKU:
- 3169TD
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- BORE SIZE METRIC:
- 80.50 MM
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
$57.95Qty in Cart: 0Quantity:Price:$57.95Subtotal: -
WISECO Ring Set 3307XC
WISECO
$52.95Wiseco ring sets are engineered for maximum compression, reduced blow-by, and extended ring life under high-RPM and boost conditions. Whether you're building a competition engine or refreshing a...3307XC- SKU:
- 3307XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BORE SIZE METRIC:
- 84.00 MM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$52.95 -
Wiseco 83mm Piston Ring Set for Kawasaki ZX-12R 2000-2005 3268XG
WISECO
$52.95Proper ring sealing is critical for maintaining compression, controlling blow-by, and maximizing power output in your ZX-12R engine. This Wiseco ring set delivers precision-engineered sealing...3268XG- SKU:
- 3268XG
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 83.00 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$52.95 -
Wiseco Piston Kit Suzuki DR650S 1990-1993 4597M09600
WISECO
$239.95Stock pistons lose efficiency and durability under demanding riding conditions—whether you're pushing your DR650S on technical trails or logging highway miles. The Wiseco piston kit restores and...09101659- SKU:
- 09101659
- Availability:
- Ships Same Business Day
- Weight:
- 1.27 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- DISPLACEMENT:
- 654 CC
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 90.40 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 96.00 MM
- PISTON MATERIAL:
- FORGED
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
Wiseco Piston Kit Yamaha XT500 1976-1981 87.50mm 9:1 4764M08750
WISECO
$239.95Your XT500 or TT500 demands a piston engineered for reliability under sustained high RPM and load—factory units wear quickly in demanding riding conditions. The Wiseco 4764M08750 kit delivers a...09101666- SKU:
- 09101666
- Availability:
- Ships Same Business Day
- Weight:
- 1.16 LBS
- BORE - OVERSIZE METRIC:
- +0.05 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 505 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,05 MM
- BORE SIZE METRIC:
- 87.50 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 84.00 MM
- UNITS:
- EACH
$239.95 -
Wiseco Piston Kit 69mm 1989-1995 Suzuki RM250 642M06900
WISECO
$224.95The Wiseco Piston Kit is engineered for 2-stroke performance demands where ring seal integrity and thermal stability directly impact horsepower delivery and engine longevity. If you're running your...09101220- SKU:
- 09101220
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- +2,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE METRIC:
- +2.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 69.00 MM
- DISPLACEMENT:
- 246 CC
- STROKE LENGTH METRIC:
- 70.80 MM
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco 200 EXC 1998-2002 Piston Kit with Gaskets PK1369
WISECO
$269.95If you're rebuilding your KTM 200 EXC or MXC, engine wear directly impacts throttle response and reliability. Wiseco's forged piston kit restores lost compression and power while the included gasket...09030512- SKU:
- 09030512
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- DISPLACEMENT:
- 193 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 64.00 MM
- PISTON DIAMETER METRIC:
- 63.95 MM
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 60.00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
$269.95 -
Wiseco Piston Kit for Yamaha YZ125 2005-2021 PK1390
WISECO
$253.95The Wiseco Piston Kit PK1390 is engineered for 2-stroke racers who demand peak performance without compromise. A worn or stock piston limits your YZ125's power delivery and throttle response—this kit...09030513- SKU:
- 09030513
- Availability:
- Ships Same Business Day
- Weight:
- 1.11 LBS
- MODEL:
- RACER'S CHOICE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- EACH
- BORE SIZE METRIC:
- 54.00 MM
- COOLING SYSTEM:
- LIQUID COOLED
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 125 CC
- STROKE LENGTH METRIC:
- 54.50 MM
$253.95Qty in Cart: 0Quantity:Price:$253.95Subtotal: -
Wiseco Piston Kit Yamaha YZ85 2002-2021 5.50mm Oversize 767M05250
WISECO
$177.95If you're running a Yamaha YZ85 hard—whether on the track or in practice—piston wear directly impacts power delivery and reliability. The Wiseco 767M05250 is engineered to restore lost compression...09100366- SKU:
- 09100366
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- BORE - OVERSIZE METRIC:
- +5.50 MM
- DISPLACEMENT:
- 103,5 CC
- STROKE LENGTH METRIC:
- 47.80 MM
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 52.50 MM
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- EACH
- BORE - OVERSIZE:
- +5,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
$177.95 -
Wiseco Piston Kit 47.50mm 11:1 Yamaha TT-R90 2003 4840M04750
WISECO
$160.95If you're running a Yamaha TTR90 and want measurable gains in power and throttle response, a high-compression piston kit is one of the most direct upgrades available. The Wiseco 47.50mm 11:1 kit...09100369- SKU:
- 09100369
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE SIZE METRIC:
- 47.50 MM
- DISPLACEMENT:
- 92 CC
- STROKE LENGTH METRIC:
- 51.80 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
$160.95 -
Wiseco Piston Kit Standard Yamaha XT 350 1985-2000 4674M08700
WISECO
$199.95If you're running a Yamaha XT350 or TT350 and want reliable power gains without compromising engine longevity, a quality piston kit is essential. The Wiseco Piston Kit Standard delivers measurable...09101661- SKU:
- 09101661
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- BORE SIZE METRIC:
- 87.00 MM
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 354 CC
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 59.60 MM
$199.95 -
Wiseco Piston Kit Standard Suzuki RM-Z 450 2008-2012 4953M09600
WISECO
$239.95If you're running a Suzuki RM-Z 450 (2008-2012) or RMX450Z, piston wear directly impacts power delivery, throttle response, and engine longevity. The Wiseco Piston Kit Standard restores combustion...09101679- SKU:
- 09101679
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 62.80 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
- SKIRT COATING:
- MOLY COATED
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
Wiseco 50cc Piston for KTM 50 SX 1998-2008 698M03900
WISECO
$132.95The Wiseco 50cc piston is engineered for KTM 50 SX riders who need reliable, consistent performance across a full season of racing or recreational riding. OEM pistons wear quickly under aggressive...09101692- SKU:
- 09101692
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 41.70 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON
- DISPLACEMENT:
- 50 CC
- BORE SIZE METRIC:
- 39.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$132.95 -
Wiseco Piston Kit +2.10 Kawasaki KX 250 2004 843M06850
WISECO
$177.44If you're running a 2004 Kawasaki KX 250 and want measurable gains in peak RPM power and throttle response, a quality piston kit is one of the most direct upgrades available. The Wiseco +2.10 raises...09100664- SKU:
- 09100664
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE SIZE METRIC:
- 68.50 MM
- ENGINE TYPE:
- 2-STROKE
- BORE - OVERSIZE:
- +2,10 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +2.10 MM
- DISPLACEMENT:
- 265 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
$177.44Qty in Cart: 0Quantity:Price:$177.44Subtotal:
