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 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 -
Wrench Rabbit Complete Engine Rebuild Kit Kawasaki KX100 2005 WR101-107
WRENCH RABBIT
$711.95Two-stroke engines demand precision during rebuild—a single worn component compromises the entire power delivery and reliability of your KX100. The Wrench Rabbit Complete Engine Rebuild Kit eliminates guesswork by bundling OEM-quality parts from trusted...09031081- SKU:
- 09031081
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 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 Engine Rebuild Kit Kawasaki KX100 1998-2000 WR101-108
WRENCH RABBIT
$683.95Two-stroke engines demand precision rebuilds, and the Wrench Rabbit Engine Kit delivers exactly that with OEM-quality components engineered specifically for your Kawasaki KX100. This comprehensive package eliminates sourcing hassle by bundling everything...09031082- SKU:
- 09031082
- Availability:
- Ships Same Business Day
- Weight:
- 8.15 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$683.95Qty in Cart: 0Quantity:Price:$683.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX85 2001-2004 WR101-109
WRENCH RABBIT
$618.95Engine wear and damage don't just cost money—they cost race days and reliability when you need it most. The Wrench Rabbit Complete Engine Rebuild Kit for your KX85 gives you everything required for a professional-grade overhaul in one package,...09031083- SKU:
- 09031083
- Availability:
- Ships Same Business Day
- Weight:
- 9.25 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$618.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX85 2005 WR101-110
WRENCH RABBIT
$592.95When your Kawasaki KX85 needs more than a patch job, the Wrench Rabbit Complete Engine Rebuild Kit delivers everything required for a full, professional restoration. This all-inclusive solution eliminates the guesswork of sourcing individual components,...09031084- SKU:
- 09031084
- Availability:
- Ships Same Business Day
- Weight:
- 8.10 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$592.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX250 1997 WR101-112
WRENCH RABBIT
$867.95When your Kawasaki KX250 two-stroke takes a beating on the track, a complete engine rebuild is the only way to restore it to factory specs and get back to peak performance. The Wrench Rabbit Complete Engine Rebuild Kit (WR101-112) eliminates the...09031086- SKU:
- 09031086
- Availability:
- Ships Same Business Day
- Weight:
- 14.25 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$867.95Qty in Cart: 0Quantity:Price:$867.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit Kawasaki KX250 1998-2001 WR101-113
WRENCH RABBIT
$867.95When your KX250's two-stroke engine reaches the end of its service life, a complete rebuild is the most cost-effective path to regaining full performance and reliability. The Wrench Rabbit Engine Rebuild Kit eliminates the guesswork of sourcing...09031087- SKU:
- 09031087
- Availability:
- Ships Same Business Day
- Weight:
- 14.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$867.95 -
Wrench Rabbit Engine Rebuild Kit for 1993-2001 Yamaha YZ80 WR101-124
WRENCH RABBIT
$592.95When your YZ80 two-stroke has logged serious hours, an engine rebuild isn't just maintenance—it's essential for restoring reliability and performance. The Wrench Rabbit Engine Rebuild Kit for 1993-2001 Yamaha YZ80 consolidates every critical component...09031098- SKU:
- 09031098
- Availability:
- Ships Same Business Day
- Weight:
- 8.00 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$592.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YZ125 1998-2000 WR101-093
WRENCH RABBIT
$737.95A two-stroke engine rebuild demands precision components and complete coverage—this kit eliminates guesswork by bundling everything needed for a professional-grade restoration. Whether you're rebuilding after hard racing or preventative maintenance, the...09031099- SKU:
- 09031099
- Availability:
- Ships Same Business Day
- Weight:
- 11.45 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$737.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YZ250 1999-2000 WR101-126
WRENCH RABBIT
$867.95A two-stroke engine rebuild demands precision components and complete coverage—half-measures lead to premature failure and costly re-work. The Wrench Rabbit Complete Engine Rebuild Kit for your 1999-2000 Yamaha YZ250 eliminates guesswork by bundling...09031100- SKU:
- 09031100
- Availability:
- Ships Same Business Day
- Weight:
- 14.20 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$867.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2001 Yamaha YZ250 WR101-127
WRENCH RABBIT
$895.95When your 2001 Yamaha YZ250 demands a complete overhaul, settling for piecemeal replacements wastes time and risks inconsistent performance. The Wrench Rabbit Complete Engine Rebuild Kit delivers every critical component you need in one package—piston,...09031101- SKU:
- 09031101
- Availability:
- Ships Same Business Day
- Weight:
- 15.45 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- ENGINE
$895.95 -
Wrench Rabbit Complete Engine Rebuild Kit for KTM 200 EXC 2003-2005 WR101-129
WRENCH RABBIT
$972.95Two-stroke engines demand precision when it comes time for a full rebuild, and piecing together quality components individually eats time and invites compatibility issues. The Wrench Rabbit Complete Engine Rebuild Kit delivers everything you need in one...09031103- SKU:
- 09031103
- Availability:
- Ships Same Business Day
- Weight:
- 11.60 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$972.95Qty in Cart: 0Quantity:Price:$972.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit for 1990-1991 Honda CR125R WR101-130
WRENCH RABBIT
$711.95When your Honda CR125R's engine reaches the end of its service life, a complete rebuild restores full performance and reliability without the cost of replacement. The Wrench Rabbit Engine Rebuild Kit bundles all the critical internal components—pistons,...09031104- SKU:
- 09031104
- Availability:
- Ships Same Business Day
- Weight:
- 11.40 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 -
Wrench Rabbit Engine Rebuild Kit for 1992-1995 Honda CR125R WR101-131
WRENCH RABBIT
$711.95A two-stroke engine rebuild demands precision and completeness—one overlooked component means wasted time and money. The Wrench Rabbit Engine Rebuild Kit for your 1992-1995 Honda CR125R eliminates guesswork by bundling every critical internal component...09031105- SKU:
- 09031105
- Availability:
- Ships Same Business Day
- Weight:
- 10.32 LBS
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
$711.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 1996-1997 Honda CR125R WR101-132
WRENCH RABBIT
$711.95A two-stroke engine rebuild demands precision components that can withstand the demands of competitive riding and high-rpm operation. The Wrench Rabbit Complete Engine Rebuild Kit for 1996-1997 Honda CR125R eliminates the guesswork of sourcing individual...09031106- SKU:
- 09031106
- Availability:
- Ships Same Business Day
- Weight:
- 10.40 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$711.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF250X 2007-2016 WR101-139
WRENCH RABBIT
$946.95When your Honda CRF250X engine shows signs of wear—whether it's loss of compression, bearing play, or seal degradation—a complete rebuild is the most cost-effective path to restoring factory performance and reliability. The Wrench Rabbit Complete Engine...09031109- SKU:
- 09031109
- Availability:
- Ships Same Business Day
- Weight:
- 12.85 LBS
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$946.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF250X 2004-2006 WR101-140
WRENCH RABBIT
$946.95When your Honda CRF250X reaches the point where a rebuild is necessary, settling for incomplete kits or sourcing components individually wastes time and introduces compatibility risks. The Wrench Rabbit Complete Engine Rebuild Kit eliminates guesswork by...09031110- SKU:
- 09031110
- Availability:
- Ships Same Business Day
- Weight:
- 12.80 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$946.95
