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...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...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...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...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...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...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
$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
