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
-
Wrench Rabbit Complete Engine Rebuild Kit for 2011-2013 Kawasaki KX250F WR101-043
WRENCH RABBIT
$1,157.95When your KX250F's engine shows signs of wear—whether from years of trail riding or track use—a complete rebuild is the most cost-effective way to restore full performance and reliability. The Wrench Rabbit Engine Rebuild Kit eliminates the guesswork by...09030980- SKU:
- 09030980
- Availability:
- Ships Same Business Day
- Weight:
- 12.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,157.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 1992-1994 Honda CR250R WR101-012
WRENCH RABBIT
$867.95When your Honda CR250R two-stroke has logged serious hours, an engine rebuild becomes essential to restore power delivery and reliability. This complete kit eliminates the guesswork of sourcing individual components—everything you need for a...09030982- SKU:
- 09030982
- Availability:
- Ships Same Business Day
- Weight:
- 14.50 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- MODEL:
- WRENCH RABBIT
$867.95 -
Wrench Rabbit Engine Rebuild Kit for 2010-2012 Kawasaki KX 450 F WR101-046
WRENCH RABBIT
$1,211.95When your KX 450 F reaches the end of its service life, a complete engine rebuild is the most cost-effective path back to peak performance. The Wrench Rabbit Engine Rebuild Kit eliminates the guesswork by bundling OEM-quality components—pistons,...09030984- SKU:
- 09030984
- Availability:
- Ships Same Business Day
- Weight:
- 16.25 LBS
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,211.95 -
Wrench Rabbit Engine Rebuild Kit Kawasaki KX65 2000-2001 WR101-047
WRENCH RABBIT
$592.95When your Kawasaki KX65 shows signs of wear—loss of compression, excessive blow-by, or sluggish throttle response—an engine rebuild restores it to factory performance specs without the downtime of sourcing individual components. The Wrench Rabbit Engine...09030985- SKU:
- 09030985
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- UNITS:
- KIT
$592.95 -
Wrench Rabbit Engine Rebuild Kit for 2005 Kawasaki KX65 WR101-050
WRENCH RABBIT
$564.95When your KX65's engine reaches the end of its service life, a quality rebuild kit is the fastest path back to reliable performance. The Wrench Rabbit Engine Rebuild Kit supplies every critical internal component you need—pistons, crankshaft, bearings,...09030988- SKU:
- 09030988
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$564.95 -
Wrench Rabbit Kawasaki KX85 2007-2013 Complete Engine Rebuild Kit WR101-052
WRENCH RABBIT
$618.95When your KX85's engine reaches the end of its service life, a complete rebuild restores full performance and reliability without the cost of a replacement powerplant. This Wrench Rabbit kit eliminates the guesswork by bundling every critical...09030990- SKU:
- 09030990
- Availability:
- Ships Same Business Day
- Weight:
- 8.85 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$618.95 -
Wrench Rabbit Complete Engine Rebuild Kit for KTM 65 SX 2003-2008 WR101-054
WRENCH RABBIT
$711.95When your KTM 65 SX engine shows signs of wear—loss of compression, bearing play, or declining performance—a complete rebuild is the most cost-effective path back to reliability. This Wrench Rabbit kit consolidates all the critical internal components...09030992- SKU:
- 09030992
- Availability:
- Ships Same Business Day
- Weight:
- 7.65 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
$711.95 -
Vertex Complete Engine Rebuild Kit for KTM 65 SX 2009-2016 WR101-055
WRENCH RABBIT
$763.95A 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 a race-worn engine to factory specs or refreshing a...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
$763.95 -
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 eliminates guesswork—each part is engineered to work...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 Complete Engine Rebuild Kit for 2008-2014 KTM 300 XC WR101-092
WRENCH RABBIT
$985.95When 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 Complete Engine Rebuild Kit eliminates guesswork by bundling...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
$985.95 -
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 restoring a tired YZ125 or preparing for the next race...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 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 for your 1998-1999 Honda CR125R eliminates guesswork by...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 Vertex and Hot Rods. If you're serious about restoring your...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 delivers all the critical internal components you need...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 component you'll need into a single, professionally-spec'd...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 guesswork by bundling OEM-quality components engineered...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
$711.95 -
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, having factory-spec pistons, crankshafts, and bearing kits...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 the critical internal components you need for a complete...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. The Wrench Rabbit WR101-105 kit consolidates everything...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
$618.95 -
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 performance. The Wrench Rabbit WR101-106 kit eliminates the...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
