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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WORKS CONNECTION Oil Fill Plug - Blue 24-030
WORKS CONNECTION
$32.95CNC-machined from 6061 T-6 aluminum, Replaces the stock plastic plug, Sealing O-ring included, Anodized finish, Made in the U.S.A.09500609- SKU:
- 09500609
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLUE
- BASE FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PLUG
$32.95 -
WORKS CONNECTION Oil Fill Plug - Black 24-021
WORKS CONNECTION
$32.95CNC-machined from 6061 T-6 aluminum, Replaces the stock plastic plug, Sealing O-ring included, Anodized finish, Made in the U.S.A.09500610- SKU:
- 09500610
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLACK
- UNITS:
- EACH
$32.95 -
WORKS CONNECTION Oil Filler Plug - Red 24-077
WORKS CONNECTION
$32.95CNC-machined from 6061 T-6 aluminum, Replaces the stock plastic plug, Sealing O-ring included, Anodized finish, Made in the U.S.A.09500965- SKU:
- 09500965
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RED
- UNITS:
- EACH
- BASE COLOR:
- RED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
$32.95 -
VESRAH Complete Gasket Kit - YZ100 VG-2010
VESRAH
$30.81Complete gasket sets include all necessary engine gaskets, o-rings and valve guide oil seals to rebuild a complete engine (do not include oil seals); sold each, Top-end gasket sets include all necessary top-end gaskets, o-rings and valve guide oil seals...VG2010- SKU:
- VG2010
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- PRODUCT NAME:
- GASKET
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$30.81 -
WINDEROSA Complete Gasket Kit - Yamaha 1100 611604
WINDEROSA
$187.03Full engine gasket set includes bases, heads, intakes and crankshaft oil seals, Made in the U.S.A.PD811540- SKU:
- PD811540
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- COMPLETE
- UNITS:
- SET
$187.03 -
MATRIX CONCEPTS,LLC Oil Drain Pan M28 100
MATRIX CONCEPTS,LLC
$26.95Oil drain pan with a built-in container, Screw-on cap and plug provides a tight, positive seal, Prevents messy spills, Compact and lightweight, Easy to store, carry and empty, Features an extra-large handle for a comfortable and secure grip07120360- SKU:
- 07120360
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- EACH
- LENGTH METRIC:
- 25.4 CM
- RIDING STYLE:
- SNOW
- WIDTH METRIC:
- 38.1 CM
- COLOR/FINISH:
- WHITE
- FEATURES:
- 6 QUARTS
- PRODUCT NAME:
- PAN
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
- TYPE:
- OIL DRAIN
$26.95 -
MATRIX CONCEPTS,LLC Oil Drain Pan - 15 Quart M28-115
MATRIX CONCEPTS,LLC
$29.95Oil drain pan with a built-in container, Screw-on cap and plug provides a tight, positive seal, Prevents messy spills, Compact and lightweight, Easy to store, carry and empty, Features an extra-large handle for a comfortable and secure grip07120644- SKU:
- 07120644
- Availability:
- Ships Same Business Day
- Weight:
- 2.21 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- LENGTH METRIC:
- 53 CM
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- WIDTH METRIC:
- 38.1 CM
- COLOR/FINISH:
- WHITE
- FEATURES:
- 15 QUARTS
- PRODUCT NAME:
- PAN
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- STREET
- TYPE:
- OIL DRAIN
$29.95 -
Wiseco Piston Kit Standard 47.50mm for Honda CR85R 2003-2007 838M04750
WISECO
$134.95Upgrade your bike's performance with the WISECO Piston Kit designed for the CR 85. This high-quality standard piston ensures optimal engine efficiency and durability, allowing you to ride with confidence. Please note that this kit does not include a...09100323- SKU:
- 09100323
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 47.80 MM
- UNITS:
- EACH
- BORE SIZE METRIC:
- 47.50 MM
- DISPLACEMENT:
- 84,7 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GP STYLE
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$134.95Qty in Cart: 0Quantity:Price:$134.95Subtotal: -
WISECO Piston Kit - +2.00 mm - XR100/R/CRF100F 4666M05500
WISECO
$169.95Pistons come without gasket kit09100331- SKU:
- 09100331
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.4:1
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 107,00 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 55.00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
$169.95 -
Wiseco Piston Kit 65.5mm 11:1 Compression Honda CRF230F 2003-2019 4816M06550
WISECO
$169.95Enhance your CRF230F's performance with the WISECO Piston Kit, designed for durability and precision. This kit provides a reliable replacement to keep your engine running smoothly, ensuring optimal power and efficiency. Please note that this kit does not...09100332- SKU:
- 09100332
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE SIZE METRIC:
- 65.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 223,00 CC
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 66.20 MM
$169.95 -
Wiseco Piston Honda CB750 1979-1982 871M08950
WISECO
$234.95Upgrade your engine's performance with the WISECO Piston Honda .50mm 871M08950. Designed for durability and efficiency, this piston ensures optimal compression and power output. Please note that this product does not include a gasket kit, so be sure to...09102023- SKU:
- 09102023
- Availability:
- Ships Same Business Day
- Weight:
- 1.24 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 89.50 MM
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- EACH
- DISPLACEMENT:
- 472 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 76.00 MM
- PISTON MATERIAL:
- FORGED
$234.95 -
Wiseco Piston Kit Honda CR500R 1984-2001 90mm 871M09000
WISECO
$234.95Upgrade your engine's performance with the WISECO Piston designed specifically for Honda models. This high-quality piston enhances durability and efficiency, ensuring optimal power delivery. Please note that this product is sold without a gasket kit,...09102024- SKU:
- 09102024
- Availability:
- Ships Same Business Day
- Weight:
- 1.27 LBS
- DISPLACEMENT:
- 472 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 79.00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 90.00 MM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 491 CC
- PISTON MATERIAL:
- ALUMINUM
$234.95 -
Wiseco Piston Kit 47mm 11:1 Compression Yamaha TT-R90 2000-2007 4840M04700
WISECO
$154.95The WISECO Piston Kit Standard 4840M04700 is engineered for optimal performance, providing a reliable upgrade for your engine. Designed for durability and precision, this piston kit ensures enhanced power and efficiency. Please note that this kit does...09100368- SKU:
- 09100368
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 51.80 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 90 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 47.00 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
$154.95 -
Wiseco Honda CRF450R 2002-2008 Piston Kit with Gaskets PK1365
WISECO
$324.95Enhance your engine's performance with the WISECO Piston Kit, meticulously crafted to deliver exceptional strength and durability. This complete kit includes everything needed for a top-end rebuild, ensuring optimal operation and reliability in...09030567- SKU:
- 09030567
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 62.10 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- TYPE:
- TOP END
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- DISPLACEMENT:
- 449 CC
- PISTON DIAMETER METRIC:
- 95.94 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$324.95 -
Wiseco Piston Kit 70.50mm Oversize for Yamaha IT250 1978-1980 234M07050
WISECO
$199.95Engineered for performance and durability, the WISECO Piston Yamaha .50mm 234M07050 is crafted from a high-silicon alloy, ensuring exceptional strength and reliability in demanding conditions. This piston is designed for both trail and racing...234M07050- SKU:
- 234M07050
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 64.00 MM
- DISPLACEMENT:
- 246 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 70.45 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 70.50 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$199.95 -
Wiseco Piston Kit Kawasaki KX250F 2011-2014 77mm 14.5:1 40020M07700
WISECO
$264.95Upgrade your KX 250 F with the WISECO Piston Kit, designed for optimal performance and durability. This piston kit enhances engine efficiency and power, ensuring you get the most out of your ride. Please note that this kit does not include a gasket set,...09102896- SKU:
- 09102896
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 53.60 MM
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- DISPLACEMENT:
- 250 CC
$264.95 -
Wiseco Piston Kit for KTM 500 EXC 2012-2016 40064M09500
WISECO
$254.95Enhance your KTM 500 EXC's performance with the WISECO Piston Kit, designed for durability and efficiency. This high-quality piston kit is engineered to deliver optimal power and reliability, ensuring a smoother ride on any terrain. Please note that a...09102898- SKU:
- 09102898
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 95.00 MM
- STROKE LENGTH METRIC:
- 72.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.8:1
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 510 CC
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
$254.95Qty in Cart: 0Quantity:Price:$254.95Subtotal: -
Wiseco Piston Kit 53.00mm 1.00mm Oversize Yamaha MX100 1979-1983 235M05300
WISECO
$139.95Engineered for optimal performance, the Wiseco Piston is crafted from a high-silicon alloy, ensuring exceptional strength and reliability. Designed to meet the demands of both trail and racing applications, this piston provides the perfect balance of...235M05300- SKU:
- 235M05300
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 98 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 52.95 MM
- BORE SIZE METRIC:
- 53.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.60 MM
$139.95 -
Wiseco Piston Kit Yamaha DT400 1975-1978 85.50mm 232M08550
WISECO
$209.95Engineered for performance and durability, the WISECO Piston is crafted from a high-silicon alloy, ensuring exceptional strength for both trail and racing applications. This piston is designed to enhance your engine's efficiency and longevity, making it...232M08550- SKU:
- 232M08550
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- UNITS:
- KIT
- BORE SIZE METRIC:
- 85.50 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON DIAMETER METRIC:
- 85.42 MM
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 397 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
$209.95 -
ACERBIS X-Power Cover Kit - Black - Honda 2791950001
ACERBIS
$69.95Engine crankcase and Ignition/clutch cover, Protects against dirt, debris and impact, Installs easily with stock crankcase and Ignition/clutch cover bolts, Molded openings for easy access to oil cap and filter cover, Heat resistant; won't interfere with...09401891- SKU:
- 09401891
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- MODEL:
- X-POWER
- COLOR/FINISH:
- BLACK
- MATERIAL:
- PLASTIC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- COVER
- PRODUCT NAME:
- COVER KIT
$69.95
