Dirt Bike Engine Rebuild Kits
Dirt Bike Engine Rebuild Kits for Kawasaki KX100, KTM XC-W 250 & Honda CRF250R at JJ Motorsports
Revive your dirt bike's engine to factory-fresh performance with premium rebuild kits from JJ Motorsports, featuring forged pistons, crankshafts, bearings, seals, and gaskets for superior compression, reduced vibration, and long-term reliability in motocross, enduro, and trail riding. Our selection includes complete top- and bottom-end kits designed for precise fitment, optimal oil flow, and enhanced power delivery without custom machining. Compatible with popular models like Kawasaki KX100, KTM XC/XC-W 250, Husqvarna TE250, and Honda CRF250R, these high-quality components from trusted brands ensure leak-free assembly, better heat management, and race-ready durability in dusty, high-RPM conditions. From Wiseco's comprehensive KX100 kits with hour meters to Vertex's all-in-one KTM rebuilds and Athena's high-performance CRF pistons, get everything needed for a pro-level refresh—pistons, rings, bearings, and gaskets—to restore throttle snap, efficiency, and confidence on every rip.
Shop brands like Wiseco, Vertex, and Athena for race-proven quality. Explore related categories such as dirt bike piston and ring kits for top-end focus or dirt bike engine for cylinders and valves.
Top Dirt Bike Engine Rebuild Kits
- Wiseco Engine Rebuild Kit 52.50 mm Kawasaki KX100 1995-2013 PWR173-100 – Comprehensive top- and bottom-end kit with high-quality crankshaft, rod assembly, main bearings, seals, gaskets, and hour meter bracket for Kawasaki KX100 models; ensures optimal performance and easy maintenance.
- VERTEX Engine Rebuild Kit - KTM XC/XC-W 250 | Husqvarna TE250 WR101-091 – All-in-one rebuild kit with Vertex piston, Hot Rods crankshaft, bearings/seals, transmission kit, and complete gaskets; perfect for professional top- and bottom-end refresh on KTM and Husqvarna 250cc models.
- ATHENA Piston Kit with Gaskets - 76.76 mm - CRF250R P5F0768245003B – High-performance 76.76 mm forged aluminum piston kit with rings, gaskets, and coatings for reduced friction; engineered for Honda CRF250R 4-stroke off-road with superior airflow and longevity.
Browse our in-stock inventory below with same-day shipping and expert support. Free shipping on orders over $99! Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
-
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 Complete Engine Rebuild Kit for Kawasaki KX65 2002-2004 and Suzuki RM65 2003-2004 WR101-049
WRENCH RABBIT
$592.95A two-stroke engine rebuild demands precision, and cutting corners on components leads to premature failure and costly downtime. The Wrench Rabbit Complete Engine Rebuild Kit for your KX65 or RM65 eliminates guesswork by bundling OEM-quality parts from...09030987- SKU:
- 09030987
- Availability:
- Ships Same Business Day
- Weight:
- 7.62 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
$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 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 critical internal component in one package, eliminating...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
$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 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) consolidates every critical component you need into one...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 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 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 eliminates guesswork by pairing OEM-quality parts from...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 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
