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 Piston Kit Yamaha YZ465 1980-1981 1.50mm 451M08650
WISECO
$244.95If you're running a YZ465 from the early '80s, piston longevity directly impacts your race results and trail reliability. This Wiseco kit delivers the strength you need for high-RPM demands while...451M08650- SKU:
- 451M08650
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- DISPLACEMENT:
- 465 CC
- BORE - OVERSIZE:
- +1,50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE METRIC:
- +1.50 MM
- MODEL:
- FORGED SERIES
- BORE SIZE METRIC:
- 86.50 MM
- PISTON DIAMETER METRIC:
- 86.42 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 82.00 MM
- UNITS:
- KIT
$244.95Qty in Cart: 0Quantity:Price:$244.95Subtotal: -
Wiseco Piston Kit Racer Elite Kawasaki KX250F 2015-2016 RE801M07700
WISECO
$369.95If you're serious about maximizing your KX250F's output, a quality piston kit is non-negotiable. Wiseco's Racer Elite design delivers measurable gains in throttle response and mid-range power while...09105070- SKU:
- 09105070
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- BORE SIZE METRIC:
- 77.00 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORGLIDE®
$369.95 -
WISECO Piston Kit - Racer Elite - YZ250F RE802M07700
WISECO
$369.95If you're running a YZ250F, YZ250FX, or WR250F and want measurable power gains without sacrificing reliability, the Wiseco Racer Elite piston kit is engineered to deliver both. The 14.5:1 compression...09105071- SKU:
- 09105071
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- ENGINE TYPE:
- 4-STROKE
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORGLIDE®
$369.95 -
Wiseco Piston Kit 77mm 14.5:1 for Suzuki RM-Z250 2010-2023 RE803M07700
WISECO
$369.95If you're running hard on the track or trail, your piston is working harder than any other engine component—and it's only as reliable as its design. The Wiseco Racer Elite 77mm 14.5:1 compression...09105072- SKU:
- 09105072
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORGLIDE®
$369.95Qty in Cart: 0Quantity:Price:$369.95Subtotal: -
Wiseco Piston Kit Yamaha YZ250 1980-1982 2mm Oversize 452M07200
WISECO
$224.95A worn or damaged piston directly limits your YZ250's performance and reliability—especially on a classic machine where finding quality replacement parts matters. The Wiseco 452M07200 restores your...452M07200- SKU:
- 452M07200
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 64.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 71.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit Honda CRF250R 2010-2015 RE810M07680
WISECO
$369.95The OEM piston in your CRF250R experiences constant thermal and mechanical stress—especially if you're pushing higher RPMs or running aggressive tuning. The Wiseco Racer Elite Piston Kit replaces...09105074- SKU:
- 09105074
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 76.80 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
$369.95Qty in Cart: 0Quantity:Price:$369.95Subtotal: -
Wiseco Piston Kit Suzuki RM80 1977-1981 456M04900
WISECO
$135.95The Wiseco 456M04900 piston kit is engineered to restore or upgrade your Suzuki RM80's top-end performance with precision-machined components built to handle the demands of aggressive riding. If...456M04900- SKU:
- 456M04900
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE SIZE METRIC:
- 49.00 MM
- DISPLACEMENT:
- 79 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON DIAMETER METRIC:
- 48.95 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STROKE LENGTH METRIC:
- 42.00 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$135.95 -
Wiseco Piston Kit 71mm Oversize for 1981-1984 Honda FL250 Odyssey 338M07100
WISECO
$210.95The Wiseco Piston Kit 71mm Oversize is engineered to restore lost displacement and revive performance on your 1981-1984 Honda FL250 Odyssey. By stepping up to a larger bore, you'll gain measurable...338M07100- SKU:
- 338M07100
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 71.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- UTV
- DISPLACEMENT:
- 248 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 70.95 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 64.40 MM
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$210.95 -
Wiseco Suzuki RM125 2000-2003 Piston Kit with Gaskets 55mm PK1182
WISECO
$199.95If you're running a 2000-2003 Suzuki RM125, a worn piston directly impacts combustion efficiency, throttle response, and overall engine longevity. The Wiseco PK1182 piston kit restores compression...09030539- SKU:
- 09030539
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 124.8 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- SKIRT COATING:
- NON-COATED
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 55.00 MM
- PISTON DIAMETER METRIC:
- 54.95 MM
$199.95Qty in Cart: 0Quantity:Price:$199.95Subtotal: -
WORKS CONNECTION Oil Plug - Blue 24-071
WORKS CONNECTION
$32.95Stock plastic oil plugs are prone to cracking under thermal stress and repeated service intervals. The WORKS CONNECTION Oil Plug replaces that weak link with CNC-machined 6061 T-6 aluminum,...09500085- SKU:
- 09500085
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- BASE COLOR:
- BLUE
- BASE FINISH:
- ANODIZED
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
- COLOR/FINISH:
- BLUE
- UNITS:
- EACH
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$32.95Qty in Cart: 0Quantity:Price:$32.95Subtotal: -
WORKS CONNECTION Oil Plug 24-002
WORKS CONNECTION
$32.95Stock plastic oil plugs are prone to stripping, cracking, and leaking—especially under the vibration and heat of track use. The WORKS CONNECTION Oil Plug 24-002 replaces that liability with a...09500086- SKU:
- 09500086
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- BASE COLOR:
- BLUE
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
$32.95 -
WORKS CONNECTION Oil Plug - Kawasaki/Suzuki 24-191
WORKS CONNECTION
$32.95Stock plastic oil plugs are prone to cracking and stripping, especially under the vibration and heat cycles of aggressive riding. The WORKS CONNECTION Oil Plug replaces that liability with a...09500087- SKU:
- 09500087
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE COLOR:
- BLUE
- UNITS:
- EACH
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- STREET
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OIL FILLER
$32.95 -
On Sale
WORKS CONNECTION Oil Plug - Suzuki 24-012
WORKS CONNECTION
MSRP: $32.95Now: $21.00Was: $32.95Stock plastic oil plugs are prone to cracking under thermal cycling and high-pressure conditions, risking catastrophic oil loss on track or trail. The WORKS CONNECTION Oil Plug replaces that...09500088- SKU:
- 09500088
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- BLUE
- MATERIAL:
- 6061 T-6 ALUMINUM
- RIDING STYLE:
- STREET
- TYPE:
- OIL FILLER
- RIDING STYLE:
- OFF-ROAD
- BASE FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
- BASE COLOR:
- BLUE
- UNITS:
- EACH
MSRP: $32.95Now: $21.00Was: $32.95Qty in Cart: 0Quantity:Price:MSRP: $32.95Now: $21.00Was: $32.95Subtotal: -
WORKS CONNECTION Engine Timing Plug - Blue - Honda 24-503
WORKS CONNECTION
$46.95Stock engine timing plugs are functional but aesthetically overlooked—and they're prone to corrosion that can make future service work frustrating. The WORKS CONNECTION Engine Timing Plug upgrades...09500091- SKU:
- 09500091
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- TYPE:
- ENGINE
- UNITS:
- SET
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- ANODIZED
- COLOR/FINISH:
- BLUE
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
$46.95 -
WORKS CONNECTION Engine Timing Plug - Red - Suzuki 24-525
WORKS CONNECTION
$46.95Engine timing plugs are a high-visibility detail that gets overlooked until you realize your stock plastic plugs are cracked, discolored, or simply don't match your build aesthetic. WORKS...09500096- SKU:
- 09500096
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- COLOR/FINISH:
- RED
- TYPE:
- ENGINE
- UNITS:
- SET
- MATERIAL:
- 6061 T-6 ALUMINUM
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- ANODIZED
$46.95Qty in Cart: 0Quantity:Price:$46.95Subtotal: -
WORKS CONNECTION Engine Timing Plug - Blue - Yamaha 24-530
WORKS CONNECTION
$46.95Engine timing plugs take a beating from constant vibration and thermal cycling, and OEM units often corrode or seize over time. The WORKS CONNECTION timing plug set replaces worn stock plugs with...09500097- SKU:
- 09500097
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- UNITS:
- SET
- COLOR/FINISH:
- BLUE
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 6061 T-6 ALUMINUM
- COLOR/FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
$46.95Qty in Cart: 0Quantity:Price:$46.95Subtotal: -
WORKS CONNECTION Aluminum Oil Filler Plug 24-020
WORKS CONNECTION
$32.95Stock plastic oil filler plugs are prone to cracking under thermal cycling and vibration, compromising engine bay integrity and risking oil leakage. The WORKS CONNECTION Aluminum Oil Filler Plug...09500006- SKU:
- 09500006
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- BASE FINISH:
- ANODIZED
- COLOR/FINISH:
- ORANGE
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
- RIDING STYLE:
- STREET
- BASE COLOR:
- ORANGE
- UNITS:
- EACH
$32.95 -
WORKS CONNECTION Aluminum Oil Filler Plug 24-190
WORKS CONNECTION
$32.95Stock plastic oil filler plugs crack, leak, and degrade under thermal cycling—especially in high-performance applications. The WORKS CONNECTION Aluminum Oil Filler Plug replaces that weak point with...09500007- SKU:
- 09500007
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE COLOR:
- RED
- BASE FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- MATERIAL:
- 6061 T-6 ALUMINUM
- TYPE:
- OIL FILLER
- COLOR/FINISH:
- RED
$32.95 -
WORKS CONNECTION Aluminum Oil Filler Plug 24-070
WORKS CONNECTION
$32.95Stock plastic oil filler plugs are prone to cracking under heat cycles and vibration, compromising your engine's seal integrity. The WORKS CONNECTION Aluminum Oil Filler Plug replaces that liability...09500009- SKU:
- 09500009
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE FINISH:
- ANODIZED
- PRODUCT NAME:
- PLUG
- RIDING STYLE:
- OFF-ROAD
- COLOR/FINISH:
- RED
- RIDING STYLE:
- ATV
- RIDING STYLE:
- STREET
- TYPE:
- CRANKCASE
- BASE COLOR:
- RED
- MATERIAL:
- 6061 T-6 ALUMINUM
- UNITS:
- EACH
$32.95 -
On Sale
Wossner Piston Kit Yamaha YZ250F 2016-2018 76.95mm 8942DA
WOSSNER
MSRP: $184.00Now: $174.80Was: $184.00A worn or damaged piston directly kills engine efficiency, compression, and reliability—especially in high-revving 2-stroke applications where tolerances are razor-thin. The Wossner 8942DA restores...09105297- SKU:
- 09105297
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- PRO SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON SIZE METRIC:
- 76.95 MM
- PRODUCT NAME:
- PISTON KIT
MSRP: $184.00Now: $174.80Was: $184.00
