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 48mm Piston Ring Set for Honda CR80R 1986-2002 1890CS
WISECO
$25.95A properly sealed combustion chamber is critical for maximizing horsepower and engine longevity on your CR80R. Wiseco's precision-engineered piston ring set delivers the compression consistency and blow-by reduction needed for reliable performance,...1890CS- SKU:
- 1890CS
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 48.00 MM
- DISPLACEMENT:
- 82,9 CC
- UNITS:
- SET
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
$25.95 -
Wiseco 48.5mm Piston Ring Set for Kawasaki KX85 2001-2013 1909CD
WISECO
$52.95Worn or damaged piston rings directly compromise combustion sealing, reducing power output and increasing blow-by—both performance killers on the track or trail. The Wiseco 1909CD delivers precision-engineered ring geometry that restores optimal...1909CD- SKU:
- 1909CD
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE METRIC:
- 48.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 82,9 CC
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$52.95 -
Wiseco Wrist Pin 18mm x 2.200" 1981-1983 Honda CR250R S257
WISECO
$23.95The Wiseco S257 wrist pin is engineered for 1981-1983 Honda CR250R engines that demand reliability under extreme racing conditions. As a critical connecting component between your piston and connecting rod, a high-quality wrist pin directly impacts...S257- SKU:
- S257
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- LENGTH:
- 56 MM
- UNITS:
- EACH
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 18,00 MM
- OUTSIDE DIAMETER METRIC:
- 18.00 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- SNOW
- LENGTH METRIC:
- 56 MM
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- STREET
- RIDING STYLE:
- UTV
$23.95 -
Wiseco Piston Kit Yamaha DT250 1974-1979 234M07000
WISECO
$210.95If you're running a Yamaha DT250 and want to reliably extract more power from your 2-stroke, a quality piston kit is non-negotiable. The Wiseco 234M07000 delivers the precision fit and durability you need to handle aggressive riding conditions without...234M07000- SKU:
- 234M07000
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 69.95 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- STROKE LENGTH METRIC:
- 64.00 MM
$210.95 -
Wiseco Piston Yamaha MT-09 2014-2025 Standard 452M07000
WISECO
$199.95If you're running a Yamaha MT-09 and pushing hard on the track or street, a worn piston directly kills your compression, throttle response, and fuel efficiency. The Wiseco 452M07000 restores full performance with CNC-machined precision and forged...452M07000- SKU:
- 452M07000
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 246 CC
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 69.95 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 64.00 MM
- UNITS:
- KIT
$199.95 -
Wiseco Piston Kit Honda XR650L 1993-2017 1mm Oversize 4562M10100
WISECO
$248.95If you're running a Honda XR650L and need to restore lost compression or rebuild after high-mileage wear, a quality piston kit is non-negotiable. The Wiseco 4562M10100 delivers OEM-spec fitment with forged 2618 alloy construction that handles sustained...4562M10100- SKU:
- 4562M10100
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- COMPRESSION RATIO IMPERIAL:
- 8.7:1
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- BORE SIZE METRIC:
- 101.00 MM
- DISPLACEMENT:
- 650 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- PISTON DIAMETER METRIC:
- 100.92 MM
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH METRIC:
- 82.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
$248.95 -
Wiseco Piston Kit Racer Elite YZ250F 2014-2016 RE812M07700
WISECO
$369.95If you're pushing your YZ250F to its limits on the track or trail, your stock piston won't cut it. The Wiseco RE812M07700 delivers the compression ratio and durability needed to handle competitive riding without sacrificing reliability. This complete kit...09105076- SKU:
- 09105076
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 77.00 MM
- COMPRESSION RATIO IMPERIAL:
- 14.5:1
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
$369.95 -
Wiseco Piston Kit 47mm for KTM 85 SX 2003-2025 RE910M04700
WISECO
$171.95If you're running a KTM 85 SX and want reliable power delivery without compromise, a quality piston kit is non-negotiable. The Wiseco RE910M04700 combines precision engineering with proven durability, giving you the thermal stability and ring sealing you...09105085- SKU:
- 09105085
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 47.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
- SKIRT COATING:
- ARMORFIT™
$171.95 -
Wiseco Piston Kit 48mm Bore for 2004-2008 Honda CRF80F PK1225
WISECO
$187.95When your CRF80F's factory piston shows wear, you lose compression, responsiveness, and the consistency you need on the track or trail. The Wiseco PK1225 restores full engine potential with a forged-aluminum piston engineered to OEM specifications,...09030173- SKU:
- 09030173
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- DISPLACEMENT:
- 79.7 CC
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.00 MM
- BORE SIZE METRIC:
- 48.00 MM
- COMPRESSION RATIO IMPERIAL:
- 9.7:1
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 47.97 MM
- PRODUCT NAME:
- REBUILD KIT
$187.95 -
Wiseco Piston Kit 66mm 10:1 Compression Honda XR200R 1986-1991 PK1121
WISECO
$204.95If you're rebuilding your Honda XR200R's top end, piston selection directly impacts throttle response, reliability, and how much power you can extract from the motor. The Wiseco PK1121 delivers the precision engineering and durability expected from a...09030211- SKU:
- 09030211
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- PISTON DIAMETER METRIC:
- 65.95 MM
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 192 CC
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 57.80 MM
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 66.00 MM
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$204.95 -
Wiseco Piston Kit with Gaskets for Suzuki RM85 2002-2020 PK1209
WISECO
$186.95When your RM85's piston shows signs of wear—loss of compression, increased blow-by, or sluggish throttle response—you need a direct replacement that restores factory performance without compromise. The Wiseco PK1209 delivers that reliability with forged...09030214- SKU:
- 09030214
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- DISPLACEMENT:
- 84.7 CC
- BORE - OVERSIZE METRIC:
- +2.00 MM
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 49.95 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +2,00 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE SIZE METRIC:
- 50.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- PISTON SIZE METRIC:
- +2.00 MM
- STROKE LENGTH METRIC:
- 46.80 MM
$186.95 -
Wiseco Piston Kit for Kawasaki KX80 1991-1997 49mm PK1302
WISECO
$192.95When your KX80's top-end reaches the end of its service life, a quality piston kit is the foundation of a reliable rebuild. The Wiseco PK1302 delivers OEM-equivalent fitment with aerospace-grade materials engineered to handle sustained high-RPM...09030222- SKU:
- 09030222
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- DISPLACEMENT:
- 82 CC
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 45.80 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE SIZE METRIC:
- 49.00 MM
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 48.95 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$192.95 -
Wiseco Honda CR125R 1992-1997 Piston Kit with Gaskets PK1164
WISECO
$238.95The stock piston on your CR125R is a compromise between cost and performance—this Wiseco kit eliminates that tradeoff. Whether you're chasing lap times at the track or pushing hard on the trails, a properly engineered piston kit directly translates to...09030295- SKU:
- 09030295
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 54.00 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- DISPLACEMENT:
- 125 CC
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON DIAMETER METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 54.50 MM
$238.95 -
Wiseco Piston Kit for Suzuki RM250 2003-2008 PK1211
WISECO
$282.95A 2-stroke engine rebuild demands precision components that can handle extreme combustion temperatures and deliver consistent power cycle after cycle. The Wiseco PK1211 is engineered specifically for Suzuki RM250 models (2003-2008), giving you the exact...09030296- SKU:
- 09030296
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- DISPLACEMENT:
- 249 CC
- PISTON DIAMETER METRIC:
- 66.34 MM
- PRODUCT NAME:
- REBUILD KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- SKIRT COATING:
- ARMORGLIDE®
- BORE SIZE METRIC:
- 66.40 MM
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- UNITS:
- KIT
$282.95 -
Wiseco Piston Kit 54mm for 2002 Yamaha YZ125 PK1191
WISECO
$224.95A worn or damaged piston directly kills your YZ125's power delivery and throttle response—and rebuilding with OEM parts leaves performance on the table. The Wiseco PK1191 gives you a complete, ready-to-install solution engineered specifically for your...09030297- SKU:
- 09030297
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 53.95 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 125 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE SIZE METRIC:
- 54.00 MM
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
$224.95 -
Wiseco Honda CR80R 1992-2002 Piston Kit with Gaskets PK1269
WISECO
$192.95If you're running a Honda CR80R and need reliable top-end performance, a quality piston kit is non-negotiable. The Wiseco PK1269 delivers the precision engineering and durability required for consistent power delivery, whether you're prepping for...09030298- SKU:
- 09030298
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 47.00 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- DISPLACEMENT:
- 82.9 CC
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 46.95 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 47.80 MM
- UNITS:
- KIT
$192.95 -
Wiseco Suzuki RM125 2000-2003 Piston Kit with Gaskets PK1180
WISECO
$219.95When your Suzuki RM125 demands a complete top-end rebuild, you need a piston kit engineered for the demands of competitive 2-stroke racing. The Wiseco PK1180 delivers aerospace-grade durability and precision engineering to restore—or exceed—your engine's...09030300- SKU:
- 09030300
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE SIZE METRIC:
- 54.00 MM
- DISPLACEMENT:
- 124.8 CC
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 53.95 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 54.50 MM
$219.95 -
Wiseco 54mm Piston Kit for 2001-2002 Honda CR125R PK1261
WISECO
$233.95When your CR125R's top-end is worn, combustion efficiency drops and horsepower bleeds away. The Wiseco PK1261 restores your engine to peak performance with a precision-engineered piston kit that handles the extreme temperatures and pressures of 2-stroke...09030301- SKU:
- 09030301
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- MODEL:
- PRO-LITE
- PISTON DIAMETER METRIC:
- 53.95 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 54.00 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- STROKE LENGTH METRIC:
- 54.50 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 125 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
$233.95 -
Wiseco Piston Kit with Gaskets for Suzuki RM85 2002-2023 PK1206
WISECO
$186.95If you're rebuilding the top end of your RM85, compromising on piston quality means sacrificing reliability and peak performance when you need it most. The Wiseco PK1206 delivers the precision engineering and durable construction that serious racers...09030303- SKU:
- 09030303
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 48.00 MM
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- DISPLACEMENT:
- 84.7 CC
- PISTON DIAMETER METRIC:
- 47.95 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 46.80 MM
$186.95 -
Wiseco Piston 49mm Oversize for Suzuki RM 80 1986-1987 542M04900
WISECO
$144.95If you're running a Suzuki RM80 and demand more power and reliability from your engine, a quality piston upgrade is non-negotiable. The Wiseco 542M04900 delivers the precision bore diameter and forged aluminum construction needed to safely handle...542M04900- SKU:
- 542M04900
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE - OVERSIZE:
- +1,50 MM
- BORE SIZE METRIC:
- 49.00 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 46.80 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 82 CC
- STROKE LENGTH:
- 46,80 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
$144.95
