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 Suzuki RM125 2004-2007 WR101-187
WRENCH RABBIT
$1,013.95Two-stroke engines don't rebuild themselves—and using a piecemeal approach to sourcing gaskets, bearings, and pistons invites compatibility issues and wasted time. The Wrench Rabbit WR101-187 eliminates guesswork by delivering every critical component in...09031439- SKU:
- 09031439
- Availability:
- Ships Same Business Day
- Weight:
- 10.85 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$1,013.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 1995-1996 Honda CR250R WR101-013
WRENCH RABBIT
$828.95A two-stroke engine rebuild demands precision and quality components—this Wrench Rabbit kit delivers both with OEM-equivalent parts engineered specifically for 1995-1996 Honda CR250R motors. Rather than sourcing individual components and risking...09030953- SKU:
- 09030953
- Availability:
- Ships Same Business Day
- Weight:
- 14.65 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REBUILD KIT
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- UNITS:
- KIT
$828.95 -
Wrench Rabbit Engine Rebuild Kit for 1997-2001 Honda CR250R WR101-014
WRENCH RABBIT
$867.95A two-stroke engine rebuild demands precision—missing even one component can compromise performance and reliability. The Wrench Rabbit Engine Rebuild Kit for your 1997-2001 Honda CR250R eliminates guesswork by bundling every critical part you'll need for...09030954- SKU:
- 09030954
- Availability:
- Ships Same Business Day
- Weight:
- 14.65 LBS
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
$867.95 -
WRENCH RABBIT Engine Kit - Honda WR101-016
WRENCH RABBIT
$867.95A complete engine rebuild requires precision components and meticulous attention to detail—which is why sourcing parts individually from multiple vendors introduces unnecessary risk and delays. The WRENCH RABBIT Engine Kit consolidates nearly every...09030956- SKU:
- 09030956
- Availability:
- Ships Same Business Day
- Weight:
- 13.64 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$867.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 1989-2001 Honda CR500R WR101-017
WRENCH RABBIT
$920.95When your Honda CR500R two-stroke demands a complete overhaul, settling for partial kits means risking engine reliability and performance. The Wrench Rabbit Complete Engine Rebuild Kit eliminates guesswork by bundling every critical component—pistons,...09030957- SKU:
- 09030957
- Availability:
- Ships Same Business Day
- Weight:
- 18.70 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
$920.95 -
Wrench Rabbit Engine Rebuild Kit for 2005-2007 Honda CR85R CR85RB WR101-018
WRENCH RABBIT
$499.95Two-stroke engines don't rebuild themselves—and when your Honda CR85R or CR85RB crankcase starts showing wear, half-measures won't cut it. The Wrench Rabbit Engine Rebuild Kit (WR101-018) gives you a complete, factory-quality solution with OEM-equivalent...09030958- SKU:
- 09030958
- Availability:
- Ships Same Business Day
- Weight:
- 8.45 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$499.95 -
Wrench Rabbit Honda CRF250R 2005 Engine Rebuild Kit WR101-020
WRENCH RABBIT
$1,052.95When your Honda CRF250R engine reaches the end of its service life, a complete rebuild is the most cost-effective path to restored performance and reliability. The Wrench Rabbit WR101-020 eliminates the guesswork by bundling every critical...09030960- SKU:
- 09030960
- Availability:
- Ships Same Business Day
- Weight:
- 12.75 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,052.95 -
Wrench Rabbit Engine Rebuild Kit for 2006 Honda CRF 250R WR101-021
WRENCH RABBIT
$1,092.95When your Honda CRF 250R engine shows signs of wear—loss of compression, top-end knock, or declining power delivery—a full rebuild is the most cost-effective path to restoring reliability and performance. The Wrench Rabbit Engine Rebuild Kit for the 2006...09030961- SKU:
- 09030961
- Availability:
- Ships Same Business Day
- Weight:
- 12.67 LBS
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
$1,092.95 -
Wrench Rabbit Engine Rebuild Kit for 2007 Honda CRF250R WR101-022
WRENCH RABBIT
$1,092.95When your Honda CRF250R's engine reaches the end of its service life, a quality rebuild kit saves you thousands compared to purchasing a complete new engine. The Wrench Rabbit WR101-022 bundles every critical component you need for a professional-grade...09030962- SKU:
- 09030962
- Availability:
- Ships Same Business Day
- Weight:
- 12.75 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,092.95 -
Wrench Rabbit Engine Rebuild Kit for 2008-2009 Honda CRF250R WR101-023
WRENCH RABBIT
$1,052.95When your Honda CRF250R's engine shows signs of wear—loss of compression, excessive blow-by, or declining power delivery—a complete rebuild is the most cost-effective path back to factory performance. The Wrench Rabbit Engine Rebuild Kit eliminates the...09030963- SKU:
- 09030963
- Availability:
- Ships Same Business Day
- Weight:
- 12.70 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,052.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2004 Honda CRF450R WR101-025
WRENCH RABBIT
$1,132.95A complete engine rebuild requires precision components that work together seamlessly—this kit eliminates guesswork by bundling everything you need in one package. Whether you're addressing worn internals, restoring a high-mileage engine, or preparing...09030965- SKU:
- 09030965
- Availability:
- Ships Same Business Day
- Weight:
- 15.88 LBS
- PRODUCT NAME:
- REBUILD KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
$1,132.95 -
Wrench Rabbit Engine Kit Honda CRF450R 2006 WR101-027
WRENCH RABBIT
$927.95A top-end rebuild alone won't cut it if your crankshaft, bearings, and seals are worn—this is where a complete engine kit becomes essential. The Wrench Rabbit Engine Kit for your CRF450R gives you everything needed for a professional-grade bottom-end and...09030966- SKU:
- 09030966
- Availability:
- Ships Same Business Day
- Weight:
- 16.50 LBS
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$927.95 -
Wrench Rabbit Engine Rebuild Kit for 2006 Honda CRF450R WR101-027
WRENCH RABBIT
$1,013.95A complete engine rebuild demands quality components that work together seamlessly—this kit eliminates the guesswork by bundling everything you need from trusted manufacturers. Whether you're refreshing a worn powerplant or rebuilding after hard racing,...09030967- SKU:
- 09030967
- Availability:
- Ships Same Business Day
- Weight:
- 16.25 LBS
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
$1,013.95Qty in Cart: 0Quantity:Price:$1,013.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for 2007-2008 Honda CRF450R WR101-028
WRENCH RABBIT
$985.95When your Honda CRF450R engine reaches the end of its service life, a complete rebuild restores it to factory specifications and reliability without the expense of a new powerplant. The Wrench Rabbit Complete Engine Rebuild Kit eliminates the guesswork...09030968- SKU:
- 09030968
- Availability:
- Ships Same Business Day
- Weight:
- 15.91 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$985.95 -
Wrench Rabbit Engine Rebuild Kit for 2009-2012 Honda CRF450R WR101-030
WRENCH RABBIT
$1,132.95When your Honda CRF450R's engine shows signs of wear—whether it's loss of compression, excessive blow-by, or simply high mileage—a complete rebuild is the most cost-effective path to restored reliability and performance. The Wrench Rabbit Engine Rebuild...09030970- SKU:
- 09030970
- Availability:
- Ships Same Business Day
- Weight:
- 17.35 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,132.95 -
Wrench Rabbit Engine Rebuild Kit for Kawasaki KX125 2003-2004 WR101-036
WRENCH RABBIT
$763.95Two-stroke engines demand precision at every level—especially when a rebuild is on the horizon. The Wrench Rabbit Engine Rebuild Kit for your KX125 delivers OEM-quality components across the entire engine, eliminating the guesswork of sourcing individual...09030973- SKU:
- 09030973
- Availability:
- Ships Same Business Day
- Weight:
- 10.17 LBS
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
$763.95Qty in Cart: 0Quantity:Price:$763.95Subtotal: -
Wrench Rabbit Engine Kit for 2003-2004 Kawasaki KFX400 WR101-039
WRENCH RABBIT
$1,092.95Whether you're rebuilding a tired KFX400 or restoring a neglected machine to factory specs, the Wrench Rabbit Engine Kit eliminates the guesswork by bundling all essential internal components into one complete package. This kit saves you from sourcing...09030976- SKU:
- 09030976
- Availability:
- Ships Same Business Day
- Weight:
- 12.00 LBS
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,092.95 -
Wrench Rabbit Engine Rebuild Kit for 2003-2004 Kawasaki KFX400 WR101-040
WRENCH RABBIT
$1,092.95When your KFX400's engine reaches the end of its service life, a quality rebuild kit saves you the time and guesswork of sourcing individual components. The Wrench Rabbit Engine Rebuild Kit delivers everything you need in one box—Vertex pistons, Hot Rods...09030977- SKU:
- 09030977
- Availability:
- Ships Same Business Day
- Weight:
- 13.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,092.95 -
Wrench Rabbit Engine Kit Kawasaki KX250F 2009 WR101-041
WRENCH RABBIT
$1,183.95A complete engine rebuild demands precision and reliability—the Wrench Rabbit Engine Kit for your 2009 Kawasaki KX250F delivers both in one comprehensive package. Rather than sourcing individual components and risk compatibility issues, this all-in-one...09030978- SKU:
- 09030978
- Availability:
- Ships Same Business Day
- Weight:
- 13.15 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,183.95 -
Wrench Rabbit Engine Rebuild Kit Kawasaki KX250F 2010 WR101-042
WRENCH RABBIT
$1,132.95When your KX250F engine reaches the end of its service life, a quality rebuild kit saves time and eliminates the guesswork of sourcing individual components. The Wrench Rabbit Engine Rebuild Kit delivers everything you need in one package—from the piston...09030979- SKU:
- 09030979
- Availability:
- Ships Same Business Day
- Weight:
- 13.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
$1,132.95Qty in Cart: 0Quantity:Price:$1,132.95Subtotal:
