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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Vertex Complete Engine Rebuild Kit for KTM 65 SX 2009-2016 WR101-055
WRENCH RABBIT
$802.15A two-stroke engine rebuild demands precision—and this complete kit eliminates guesswork by bundling every critical component you need for a thorough, professional overhaul. Whether you're returning...09030993- SKU:
- 09030993
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
$802.15 -
Wrench Rabbit Complete Engine Rebuild Kit for 2004-2012 KTM 85 SX WR101-056
WRENCH RABBIT
$737.95When engine wear compromises your KTM 85 SX's performance, a complete rebuild kit saves time and money by consolidating every critical component into one comprehensive package. This Wrench Rabbit kit...09030994- SKU:
- 09030994
- Availability:
- Ships Same Business Day
- Weight:
- 7.82 LBS
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- UNITS:
- KIT
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REBUILD KIT
$737.95 -
Wrench Rabbit Engine Rebuild Kit for 2000-2004 Suzuki DR-Z 400 WR101-058
WRENCH RABBIT
$1,249.95When your DR-Z 400 starts losing compression and top-end performance, a full engine rebuild is the most cost-effective path back to reliability. The Wrench Rabbit Engine Rebuild Kit gives you every...09030996- SKU:
- 09030996
- Availability:
- Ships Same Business Day
- Weight:
- 16.60 LBS
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$1,249.95Qty in Cart: 0Quantity:Price:$1,249.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for 2008-2014 KTM 300 XC WR101-092
WRENCH RABBIT
$1,035.25When your KTM 300 XC engine has logged serious hours, a quality rebuild isn't optional—it's essential to restore compression, reliability, and the power output you depend on. The Wrench Rabbit...09031067- SKU:
- 09031067
- Availability:
- Ships Same Business Day
- Weight:
- 15.30 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,035.25 -
Wrench Rabbit Engine Rebuild Kit Yamaha YZ125 1998-2000 WR101-093
WRENCH RABBIT
$763.95A two-stroke engine rebuild demands precision and reliability—cheap shortcuts lead to catastrophic failures on the track or trail. The Wrench Rabbit Engine Rebuild Kit for Yamaha YZ125 (1998-2000)...09031068- SKU:
- 09031068
- Availability:
- Ships Same Business Day
- Weight:
- 10.45 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$763.95Qty in Cart: 0Quantity:Price:$763.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit Yamaha YZ125 2002-2004 WR101-094
WRENCH RABBIT
$763.95A two-stroke engine rebuild demands precision components that work together seamlessly—and this Wrench Rabbit kit eliminates the guesswork by bundling everything you need in one box. Whether you're...09031069- SKU:
- 09031069
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$763.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YZ250 2002 WR101-095
WRENCH RABBIT
$895.95Two-stroke engines demand precision during rebuilds—and compromises on components lead to premature failure and lost track time. The Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YZ250 2002...09031070- SKU:
- 09031070
- Availability:
- Ships Same Business Day
- Weight:
- 15.45 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$895.95Qty in Cart: 0Quantity:Price:$895.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit for 1998-1999 Honda CR125R WR101-096
WRENCH RABBIT
$711.95A two-stroke engine rebuild demands precision and quality components—any weakness in the kit compounds into lost power, reliability issues, and premature wear. The Wrench Rabbit Engine Rebuild Kit...09031071- SKU:
- 09031071
- Availability:
- Ships Same Business Day
- Weight:
- 11.40 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$711.95 -
Wrench Rabbit Engine Rebuild Kit for Honda CR125R 2001-2002 WR101-097
WRENCH RABBIT
$711.95A complete engine rebuild demands precision components that work together as an integrated system—this kit eliminates the guesswork by bundling OEM-quality parts from trusted manufacturers like...09031072- SKU:
- 09031072
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
$711.95 -
Wrench Rabbit Engine Rebuild Kit for 2003 Honda CR125R WR101-098
WRENCH RABBIT
$657.95When a two-stroke engine has logged serious hours or suffered internal wear, a full rebuild is your path back to reliable performance. The Wrench Rabbit Engine Rebuild Kit for the 2003 Honda CR125R...09031073- SKU:
- 09031073
- Availability:
- Ships Same Business Day
- Weight:
- 11.40 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
$657.95 -
Wrench Rabbit Engine Rebuild Kit for 1998-1999 Honda CR125R WR101-099
WRENCH RABBIT
$683.95When your Honda CR125R two-stroke hits a critical limit, a quality engine rebuild is the only path back to reliable performance. The Wrench Rabbit WR101-099 kit consolidates every major internal...09031074- SKU:
- 09031074
- Availability:
- Ships Same Business Day
- Weight:
- 10.25 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$683.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2005-2007 Honda CR125R WR101-100
WRENCH RABBIT
$711.95Two-stroke engines demand precision during rebuild—engine wear, bearing degradation, and seal failure compromise performance and reliability. The Wrench Rabbit Complete Engine Rebuild Kit eliminates...09031075- SKU:
- 09031075
- Availability:
- Ships Same Business Day
- Weight:
- 10.55 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$711.95Qty in Cart: 0Quantity:Price:$711.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for 2000 Honda CR125R WR101-101
WRENCH RABBIT
$683.95A two-stroke engine rebuild demands precision—and this Wrench Rabbit kit delivers every component you need in one package. Whether you're restoring a worn CR125R or refreshing an aging top-end,...09031076- SKU:
- 09031076
- Availability:
- Ships Same Business Day
- Weight:
- 10.45 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$683.95 -
Wrench Rabbit Engine Rebuild Kit for 2003-2004 Honda CR85R WR101-104
WRENCH RABBIT
$526.95When your Honda CR85R's engine has reached the end of its service life, a quality rebuild kit is the most cost-effective path back to reliable performance. The Wrench Rabbit WR101-104 supplies all...09031078- SKU:
- 09031078
- Availability:
- Ships Same Business Day
- Weight:
- 8.40 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$526.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX80 1991-1997 WR101-105
WRENCH RABBIT
$618.95If your KX80 is showing signs of wear—loss of compression, rough idle, or declining power—a complete engine rebuild is the most cost-effective path to restoring original performance and reliability...09031079- SKU:
- 09031079
- Availability:
- Ships Same Business Day
- Weight:
- 8.00 LBS
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$618.95Qty in Cart: 0Quantity:Price:$618.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for 2001-2004 Kawasaki KX100 WR101-106
WRENCH RABBIT
$711.95When your KX100's engine shows signs of wear—whether it's loss of compression, bearing noise, or just age-related fatigue—a complete rebuild is the most cost-effective path to restoring peak...09031080- SKU:
- 09031080
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$711.95 -
Wrench Rabbit Complete Engine Rebuild Kit Kawasaki KX100 2005 WR101-107
WRENCH RABBIT
$711.95Two-stroke engines demand precision during rebuild—a single worn component compromises the entire power delivery and reliability of your KX100. The Wrench Rabbit Complete Engine Rebuild Kit...09031081- SKU:
- 09031081
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$711.95 -
Wrench Rabbit Engine Rebuild Kit Kawasaki KX100 1998-2000 WR101-108
WRENCH RABBIT
$683.95Two-stroke engines demand precision rebuilds, and the Wrench Rabbit Engine Kit delivers exactly that with OEM-quality components engineered specifically for your Kawasaki KX100. This comprehensive...09031082- SKU:
- 09031082
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$683.95Qty in Cart: 0Quantity:Price:$683.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX85 2001-2004 WR101-109
WRENCH RABBIT
$649.90Engine wear and damage don't just cost money—they cost race days and reliability when you need it most. The Wrench Rabbit Complete Engine Rebuild Kit for your KX85 gives you everything required for a...09031083- SKU:
- 09031083
- Availability:
- Ships Same Business Day
- Weight:
- 9.25 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$649.90 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX85 2005 WR101-110
WRENCH RABBIT
$592.95When your Kawasaki KX85 needs more than a patch job, the Wrench Rabbit Complete Engine Rebuild Kit delivers everything required for a full, professional restoration. This all-inclusive solution...09031084- SKU:
- 09031084
- Availability:
- Ships Same Business Day
- Weight:
- 8.10 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$592.95
