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!
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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 ratio and high-silicon aluminum construction are built...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 piston kit is engineered specifically for the Suzuki...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®
$369.95 -
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 you're rebuilding after wear or seeking improved throttle...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 horsepower and throttle response while maintaining the...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 -
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 CNC-machined aluminum alternative that threads securely and...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 CNC-machined aluminum design that won't fail when you need...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 -
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 both form and function with precision-machined...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 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 replaces that weakness with precision-machined durability,...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 a precision-engineered, CNC-machined component that...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 with a precision-engineered component that withstands...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 lost performance with German-engineered precision, using...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 -
On Sale
Wossner Piston Kit 76.96mm Yamaha YZ250F 2016-2018 YZ250FX 2017-2019 8942DB
WOSSNER
MSRP: $184.00Now: $174.80Was: $184.00When you're pushing a 2-stroke engine to its limits, the piston is ground zero for performance and reliability. The Wossner 8942DB kit delivers the durability and precision needed to handle sustained high RPM operation without sacrificing responsiveness...09105298- SKU:
- 09105298
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- COMPRESSION RATIO IMPERIAL:
- 13.7:1
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.01 MM
- MODEL:
- PRO SERIES
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +0,01 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 76.96 MM
MSRP: $184.00Now: $174.80Was: $184.00 -
On Sale
Wossner Suzuki RM250 2000-2002 Piston Kit 8059DB
WOSSNER
MSRP: $152.00Now: $144.40Was: $152.00If you're running a 2-stroke RM250 between 2000-2002, piston wear is one of the most direct threats to engine performance and reliability. The Wossner 8059DB delivers the precision engineering and material science required to sustain high RPMs, reduce...09105496- SKU:
- 09105496
- Availability:
- Ships Same Business Day
- Weight:
- 0.76 LBS
- BORE - OVERSIZE:
- +0,01 MM
- BORE SIZE METRIC:
- 66.41 MM
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE METRIC:
- +0.01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 66.35 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $152.00Now: $144.40Was: $152.00 -
On Sale
Wossner Piston Kit KTM EXC300 1996-2003 8017DA
WOSSNER
MSRP: $192.00Now: $182.40Was: $192.00When you're running a 2-stroke at its limits, your piston is working harder than any other component in the engine. The Wossner 8017DA piston kit delivers the durability and precision you need to maintain power output without sacrificing reliability or...09104710- SKU:
- 09104710
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- DISPLACEMENT:
- 293 CC
- RIDING STYLE:
- STREET
- BORE - OVERSIZE METRIC:
- STANDARD
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 71.93 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 72.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
MSRP: $192.00Now: $182.40Was: $192.00 -
On Sale
Wossner 72.01mm Piston Kit for 1996-2003 KTM 300 EXC 8017DB
WOSSNER
MSRP: $192.00Now: $182.40Was: $192.00The Wossner 72.01mm Piston Kit is engineered for KTM 300 EXC riders who demand reliability and peak performance from their 2-stroke engine. Factory OEM pistons wear quickly under aggressive riding conditions—this premium kit extends engine life while...09104711- SKU:
- 09104711
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- +0,01 MM
- BORE SIZE METRIC:
- 72.01 MM
- DISPLACEMENT:
- 293 CC
- MODEL:
- STANDARD SERIES
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE - OVERSIZE METRIC:
- +0.01 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 71.94 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $192.00Now: $182.40Was: $192.00 -
On Sale
Wossner Piston Kit 71.95mm KTM 300 EXC 1996-2003 8017DC
WOSSNER
MSRP: $192.00Now: $182.40Was: $192.00When you're pushing a KTM 300 EXC to its limits, your piston needs to handle extreme combustion pressures without sacrificing reliability. The Wossner 8017DC piston kit delivers German-engineered precision with a forged 4032 T6 aluminum alloy...09104712- SKU:
- 09104712
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE SIZE METRIC:
- 72.02 MM
- PISTON MATERIAL:
- FORGED
- TYPE:
- DUAL RING
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON SIZE METRIC:
- 71.95 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- +0.02 MM
- DISPLACEMENT:
- 293 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- BORE - OVERSIZE:
- +0,02 MM
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $192.00Now: $182.40Was: $192.00 -
On Sale
Wossner Piston Kit for 2006-2014 BMW 3 Series 2.5L 8026DA
WOSSNER
MSRP: $152.00Now: $144.40Was: $152.00If you're running a 2006-2014 BMW 3 Series 2.5L engine at or near its limits, stock pistons won't cut it. The Wossner 8026DA Piston Kit replaces weak OEM components with forged 4032 T6 aluminum engineered for durability, reduced friction, and sustained...09104740- SKU:
- 09104740
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 249 CC
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 66.34 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 66.40 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $152.00Now: $144.40Was: $152.00 -
On Sale
Wossner Suzuki RM125 2004-2007 53.96mm Piston Kit 8098DB
WOSSNER
MSRP: $142.00Now: $134.90Was: $142.00The Wössner 8098DB piston kit is engineered to restore your RM125's peak performance and reliability. Whether you're rebuilding after a seizure or upgrading from OEM components, this German-precision piston delivers the durability and efficiency your...09104824- SKU:
- 09104824
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- BORE - OVERSIZE METRIC:
- +0.01 MM
- BORE SIZE METRIC:
- 54.01 MM
- DISPLACEMENT:
- 124 CC
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 53.96 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,01 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
MSRP: $142.00Now: $134.90Was: $142.00 -
On Sale
Wossner Piston Kit Kawasaki KX85 2001-2025 48.45mm 8102DA
WOSSNER
MSRP: $112.00Now: $106.40Was: $112.00Stock pistons can't handle the demands of high-performance riding—worn rings lose compression, increased friction robs you of power, and piston rock creates unwanted noise and wear. The Wossner 8102DA delivers the complete solution with OEM-spec fitment...09104826- SKU:
- 09104826
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 48.45 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- TYPE:
- SINGLE RING
- BORE SIZE METRIC:
- 48.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
MSRP: $112.00Now: $106.40Was: $112.00 -
On Sale
Wossner Suzuki RM85 2002-2023 47.97mm Piston Kit 8103DC
WOSSNER
MSRP: $112.00Now: $106.40Was: $112.00A worn or damaged piston directly kills engine performance, reliability, and throttle response on your RM85—especially critical for 2-stroke engines that depend on precision tolerances. The Wossner 8103DC delivers a complete, ready-to-install solution...09104831- SKU:
- 09104831
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- BORE - OVERSIZE METRIC:
- +0.02 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- SINGLE RING
- BORE - OVERSIZE:
- +0,02 MM
- MODEL:
- STANDARD SERIES
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 48.02 MM
- DISPLACEMENT:
- 84 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 47.97 MM
MSRP: $112.00Now: $106.40Was: $112.00
