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
-
Rekluse Clutch Cover KTM 125 SX 2016-2022 RMS-390
REKLUSE
$229.00If you're running a KTM 125 SX on the trail or track, the stock clutch cover is your first point of failure when things get rough. The Rekluse RMS-390 replaces that vulnerable component with billet aluminum construction that resists impacts from rocks...09401819- SKU:
- 09401819
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- TYPE:
- CLUTCH
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLACK
- MATERIAL:
- BILLET ALUMINUM
- RIDING STYLE:
- OFF-ROAD
$229.00 -
HifloFiltro Oil Filter for Beta RR 350 4T 2011-2024 HF631
HIFLOFILTRO
$8.08Proper oil filtration is non-negotiable for engine longevity, especially in high-demand 4-stroke applications. The HifloFiltro HF631 delivers OEM-grade filtration without compromise, removing contaminants that degrade oil viscosity and accelerate wear...07120423- SKU:
- 07120423
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- BASE COLOR:
- YELLOW
- STYLE:
- PREMIUM
- LENGTH METRIC:
- 120 MM
- PRODUCT NAME:
- OIL FILTER
- WIDTH METRIC:
- 29 MM
- COLOR/FINISH:
- YELLOW
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
$8.08 -
Hiflofiltro Oil Filter for Yamaha WaveRunner FX HO 2009-2016 HF740
HIFLOFILTRO
$9.13Proper oil filtration is critical for maintaining engine longevity and performance on your WaveRunner FX HO, especially during high-RPM operation. The Hiflofiltro HF740 removes contaminants and debris that can accelerate wear on internal components,...07120476- SKU:
- 07120476
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
- LENGTH METRIC:
- 80 MM
- BASE COLOR:
- BLACK
- RIDING STYLE:
- WATERCRAFT
- STYLE:
- PREMIUM
- WIDTH METRIC:
- 74 MM
$9.13 -
Hiflofiltro Oil Filter for BMW G450X 2009-2010 Husqvarna TC449 2011-2012 TE449 2011-2012 TE511 2011-2013 Sherco 450 Enduro/SM 2004-2007 HF611
HIFLOFILTRO
$5.45Keeping your engine clean is non-negotiable in off-road and track environments where dust, dirt, and debris are constant threats. The Hiflofiltro HF611 delivers high-efficiency filtration that protects critical engine components while maintaining proper...07120214- SKU:
- 07120214
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- COLOR/FINISH:
- YELLOW
- LENGTH METRIC:
- 87 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- WIDTH METRIC:
- 41 MM
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- YELLOW
- STYLE:
- PREMIUM
$5.45 -
Hiflofiltro Oil Filter for Husqvarna FC250 2014-2020 HF652
HIFLOFILTRO
$6.45Engine longevity depends on reliable oil filtration, and the Hiflofiltro HF652 delivers the protection your Husqvarna FC250 demands. This OEM-equivalent filter removes contaminants and maintains consistent oil flow under racing conditions, keeping your...07120215- SKU:
- 07120215
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- BASE COLOR:
- RED
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- STYLE:
- PREMIUM
- COLOR/FINISH:
- RED
- LENGTH METRIC:
- 87 MM
- UNITS:
- EACH
- WIDTH METRIC:
- 33 MM
$6.45 -
HifloFiltro Oil Filter for Honda CRF150R 2007-2025 HF116
HIFLOFILTRO
$4.34Consistent oil filtration is critical for engine longevity on your Honda CRF150R. The HifloFiltro HF116 traps contaminants effectively while maintaining optimal oil flow, reducing wear on internal components and keeping your engine running at peak...07120034- SKU:
- 07120034
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- OFF-ROAD
- BASE COLOR:
- RED
- STYLE:
- PREMIUM
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- WIDTH METRIC:
- 38 MM
- LENGTH METRIC:
- 36 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$4.34 -
Hiflofiltro Oil Filter for KTM 250 SX-F 2005-2012 HF655
HIFLOFILTRO
$6.71Keeping your KTM 250 SX-F running at peak performance demands filtration you can trust. The Hiflofiltro HF655 delivers the engine protection serious racers and weekend warriors need, removing contaminants without sacrificing flow rate or reliability...07120098- SKU:
- 07120098
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BASE COLOR:
- YELLOW
- STYLE:
- PREMIUM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- WIDTH METRIC:
- 41 MM
- COLOR/FINISH:
- YELLOW
- LENGTH METRIC:
- 69 MM
$6.71 -
Hiflofiltro Oil Filter for Polaris 800 Sportsman 2005 HF198
HIFLOFILTRO
$9.37Keep your Polaris 800 Sportsman running clean and efficient with the Hiflofiltro HF198 oil filter—engineered to trap contaminants before they circulate through your engine. Regular oil filter maintenance is non-negotiable for preventing premature wear,...07120549- SKU:
- 07120549
- Availability:
- Ships Same Business Day
- Weight:
- 0.46 LBS
- RIDING STYLE:
- ATV
- WIDTH METRIC:
- 65 MM
- BASE COLOR:
- BLACK
- LENGTH METRIC:
- 95 MM
- STYLE:
- PREMIUM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
$9.37 -
HifloFiltro Oil Filter for Husqvarna 701 Enduro 2016-2022 HF651
HIFLOFILTRO
$6.11Regular oil changes are non-negotiable for engine longevity, but only a quality filter ensures your fresh oil stays clean between services. The HifloFiltro HF651 delivers OEM-level filtration for your Husqvarna 701 Enduro, trapping wear particles and...07120445- SKU:
- 07120445
- Availability:
- Ships Same Business Day
- Weight:
- 0.09 LBS
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- WIDTH METRIC:
- 41.5 MM
- RIDING STYLE:
- OFF-ROAD
- LENGTH METRIC:
- 53 MM
- PRODUCT NAME:
- OIL FILTER
- RIDING STYLE:
- STREET
- BASE COLOR:
- RED
- STYLE:
- PREMIUM
$6.11 -
On Sale
VERTEX Piston Kit 23924B
VERTEX
MSRP: $279.95Now: $179.00Was: $279.95Whether you're rebuilding a high-mileage engine or constructing a purpose-built race motor, piston quality directly impacts reliability, longevity, and peak performance. The VERTEX Piston Kit 23924B delivers heat-treated durability and proven...09103331- SKU:
- 09103331
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +3.00 MM
- CYLINDER DIAMETER METRIC:
- 99.00 MM
- DISPLACEMENT:
- 480 CC
- PISTON DIAMETER METRIC:
- 98.97 MM
- STYLE:
- FORGED BIG BORE
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 13.6:1
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
MSRP: $279.95Now: $179.00Was: $279.95 -
VERTEX Piston Kit 23867A
VERTEX
$327.95The VERTEX Piston Kit 23867A delivers the durability and precision needed for serious engine builds, whether you're chasing reliability or maximum performance. Built from premium materials with heat-treatment and advanced surface coatings, these pistons...09103334- SKU:
- 09103334
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- BORE - OVERSIZE:
- +3,00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE - OVERSIZE METRIC:
- +3.00 MM
- DISPLACEMENT:
- 270 CC
- PISTON DIAMETER METRIC:
- 80.96 MM
- RIDING STYLE:
- STREET
- STYLE:
- FORGED BIG BORE
$327.95 -
On Sale
VERTEX Piston Kit 23867B
VERTEX
MSRP: $268.95Now: $172.00Was: $268.95The VERTEX Piston Kit 23867B delivers the reliability and precision your engine demands, whether you're rebuilding stock or pushing performance limits. Engineered with premium materials and heat-treated for durability, this kit ensures faster break-in,...09103335- SKU:
- 09103335
- Availability:
- Ships Same Business Day
- Weight:
- 0.61 LBS
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +3,00 MM
- CYLINDER DIAMETER METRIC:
- 81.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- DISPLACEMENT:
- 270 CC
- PISTON DIAMETER METRIC:
- 80.97 MM
- STYLE:
- FORGED BIG BORE
MSRP: $268.95Now: $172.00Was: $268.95 -
VERTEX Piston Kit VTK24370B
VERTEX
$150.95A quality piston kit is the foundation of reliable high-RPM performance and engine longevity. The VERTEX Piston Kit VTK24370B delivers precision-engineered pistons with advanced surface treatments that reduce friction during break-in and extend service...09103146- SKU:
- 09103146
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- CYLINDER DIAMETER METRIC:
- 47.50 MM
- PRODUCT NAME:
- TOP END PISTON KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.45 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
$150.95 -
VERTEX Piston Circlips - SX/EXC/XC 72048K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston pin secure under extreme combustion pressures and high-RPM stress. Using OEM-specification VERTEX circlips ensures proper fitment with your piston kit and eliminates the risk of...09130047- SKU:
- 09130047
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- UTV
- UNITS:
- PAIR
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
$3.95 -
VERTEX Piston Circlips - 85/105CC 72050K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston pins secure under extreme combustion pressures and high RPM loads. Using OEM-specification circlips ensures proper fitment within Vertex piston kits and eliminates the risk of...09130048- SKU:
- 09130048
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
$3.95 -
VERTEX Piston Circlips 72055K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston rings seated and functioning under extreme combustion pressures. If you're rebuilding a Vertex piston kit, OEM-spec circlips are non-negotiable—inferior replacements can lead to ring...09130049- SKU:
- 09130049
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CIRCLIP
$3.95 -
VERTEX Piston Circlips - 2-Stroke 125/144 72071K
VERTEX
$3.95Piston circlips are a critical wear item in 2-stroke engines—they secure the piston pin and directly impact engine reliability and performance. If you're rebuilding a top-end or replacing a Vertex piston kit, OEM-spec circlips ensure precise fitment and...09130054- SKU:
- 09130054
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- RIDING STYLE:
- STREET
$3.95 -
VERTEX Piston Circlips 72074K
VERTEX
$3.95Piston circlips are critical retention components that keep your piston pins secure under extreme combustion pressures and RPM loads. Using OEM-specification circlips ensures proper fitment with Vertex piston kits and eliminates the risk of catastrophic...09130056- SKU:
- 09130056
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PRODUCT NAME:
- CIRCLIP
- UNITS:
- PAIR
- RIDING STYLE:
- STREET
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
$3.95 -
VERTEX Piston Ring 53010007200
VERTEX
$45.95Piston rings are critical to engine sealing and compression—worn or damaged rings lead to blow-by, power loss, and accelerated engine wear. The VERTEX Piston Ring 53010007200 delivers OEM-quality replacement rings with advanced surface treatments that...09120177- SKU:
- 09120177
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON DIAMETER METRIC:
- 71.95 MM
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$45.95 -
VERTEX Piston Ring 55910005400
VERTEX
$39.95Piston ring wear directly impacts compression, power delivery, and engine longevity. VERTEX Piston Ring 55910005400 delivers the durability needed for sustained high-RPM performance through advanced surface coatings that resist scuffing and premature...09120203- SKU:
- 09120203
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 53.95 MM
- UNITS:
- EACH
$39.95
