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 1997-2001 Honda CR250R WR101-014
WRENCH RABBIT
$911.35A 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...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
$911.35 -
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...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
$867.95Qty in Cart: 0Quantity:Price:$867.95Subtotal: -
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...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
$524.95Two-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...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
$524.95 -
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...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...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...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
$1,105.60When 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...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
$1,105.60 -
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...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
$1,132.95A 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...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
$1,132.95 -
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...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...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...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...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...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...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...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...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: -
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...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
$1,157.95Qty in Cart: 0Quantity:Price:$1,157.95Subtotal: -
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...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
