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 1994-1996 Kawasaki KX250 WR101-117
WRENCH RABBIT
$867.95A complete engine rebuild demands precision components and a single, reliable source—this kit eliminates guesswork by bundling everything you need to restore your KX250 to factory specifications. Whether you're addressing worn pistons, damaged bearings,...09031091- SKU:
- 09031091
- Availability:
- Ships Same Business Day
- Weight:
- 14.25 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$867.95 -
Wrench Rabbit Engine Rebuild Kit KTM 144 SX 2007-2008 WR101-119
WRENCH RABBIT
$985.95Two-stroke engines demand precision when rebuilding—subpar components lead to premature failure and lost track time. The Wrench Rabbit Engine Rebuild Kit delivers everything you need in one package, eliminating guesswork and sourcing multiple suppliers...09031093- SKU:
- 09031093
- Availability:
- Ships Same Business Day
- Weight:
- 11.30 LBS
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- UNITS:
- KIT
$985.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX85 2006 WR101-133
WRENCH RABBIT
$618.95Two-stroke engines demand precision during rebuild—any compromise on component quality directly impacts reliability and performance. This Wrench Rabbit kit consolidates every critical component you need into a single package, eliminating the guesswork of...09031107- SKU:
- 09031107
- Availability:
- Ships Same Business Day
- Weight:
- 9.25 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
$618.95 -
Wrench Rabbit Engine Rebuild Kit for KTM 250 SX-F 2011 WR101-143
WRENCH RABBIT
$1,249.95When your KTM 250 SX-F engine has logged serious track time, an engine rebuild isn't just maintenance—it's a necessity to restore lost compression, seal integrity, and reliability. The Wrench Rabbit Engine Rebuild Kit eliminates the guesswork of sourcing...09031113- SKU:
- 09031113
- Availability:
- Ships Same Business Day
- Weight:
- 12.45 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,249.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2013-2017 KTM 85 SX WR101-148
WRENCH RABBIT
$867.95A two-stroke engine rebuild demands precision and quality components that work in concert—cutting corners with mismatched parts leads to premature failure and wasted time. The Wrench Rabbit Complete Engine Rebuild Kit eliminates guesswork by bundling...09031117- SKU:
- 09031117
- Availability:
- Ships Same Business Day
- Weight:
- 8.30 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 Honda CRF450R 2002-2003 WR101-152
WRENCH RABBIT
$985.95When your Honda CRF450R 2002-2003 has logged serious track time, an engine rebuild isn't just maintenance—it's the foundation for consistent power and reliability. The Wrench Rabbit WR101-152 Engine Rebuild Kit eliminates the guesswork by pairing...09031121- SKU:
- 09031121
- Availability:
- Ships Same Business Day
- Weight:
- 16.25 LBS
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
$985.95 -
Wrench Rabbit Engine Rebuild Kit for 2014-2015 Honda CRF250R WR101-153
WRENCH RABBIT
$1,052.95When your Honda CRF250R's engine starts showing signs of wear—whether from high-mileage racing or aggressive riding—a full rebuild is the most cost-effective way to restore factory performance and reliability. The Wrench Rabbit Engine Rebuild Kit...09031122- SKU:
- 09031122
- Availability:
- Ships Same Business Day
- Weight:
- 12.90 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,052.95 -
Wrench Rabbit Engine Rebuild Kit KTM 200 XC-W 2013-2014 WR101-154
WRENCH RABBIT
$985.95Two-stroke engines demand precision components and proper assembly to deliver reliable performance lap after lap. The Wrench Rabbit Engine Rebuild Kit for KTM 200 XC-W consolidates every critical component you need into one complete package, eliminating...09031123- SKU:
- 09031123
- Availability:
- Ships Same Business Day
- Weight:
- 11.45 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$985.95 -
Wiseco Engine Rebuild Kit for Suzuki RM250 2003-2004 PWR165A-100
WISECO
$732.95A worn or damaged engine in your RM250 doesn't just compromise performance—it threatens reliability when you need it most. The Wiseco Engine Rebuild Kit PWR165A-100 supplies every critical component for a complete top and bottom-end rebuild, restoring...09031544- SKU:
- 09031544
- Availability:
- Ships Same Business Day
- Weight:
- 13.65 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- DISPLACEMENT:
- 250 CC
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 66.40 MM
- OVERBORE METRIC:
- STANDARD
- UNITS:
- KIT
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
$732.95 -
Wrench Rabbit Engine Rebuild Kit for Suzuki RMZ450 2008-2012 WR101-076
WRENCH RABBIT
$1,288.95When your RMZ450's engine reaches the end of its service life, a complete rebuild using OEM-quality components is the most cost-effective path to restored performance and reliability. The Wrench Rabbit Engine Rebuild Kit consolidates all critical...09031011- SKU:
- 09031011
- Availability:
- Ships Same Business Day
- Weight:
- 15.95 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,288.95 -
Wrench Rabbit Yamaha YZ125 2005-2016 Complete Engine Rebuild Kit WR101-081
WRENCH RABBIT
$737.95When your Yamaha YZ125 engine shows signs of wear—whether it's lost compression, increased blow-by, or declining power delivery—a complete rebuild is the most cost-effective path to restoring full performance. The Wrench Rabbit WR101-081 kit consolidates...09031016- SKU:
- 09031016
- Availability:
- Ships Same Business Day
- Weight:
- 10.30 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$737.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX80 1998-2000 WR101-011
WRENCH RABBIT
$592.95A complete engine rebuild demands precision components that work in concert—and this Wrench Rabbit kit delivers exactly that for your KX80. Whether you're restoring a seized engine or refreshing one after hard miles, this all-in-one solution eliminates...09031058- SKU:
- 09031058
- Availability:
- Ships Same Business Day
- Weight:
- 8.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$592.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2007-2015 KTM 125 SX WR101-216
WRENCH RABBIT
$985.95When your KTM 125 SX engine hits its limits, a complete rebuild is the only way to restore full performance and reliability. The Wrench Rabbit Complete Engine Rebuild Kit eliminates the guesswork by bundling every critical component—pistons, crankshaft,...09031060- SKU:
- 09031060
- Availability:
- Ships Same Business Day
- Weight:
- 11.00 LBS
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$985.95 -
Wrench Rabbit Engine Rebuild Kit for KTM 250 SX 2007-2015 WR101-067
WRENCH RABBIT
$985.95When your KTM 250 SX two-stroke hits the mileage wall, a full engine rebuild is the only way to restore compression, reliability, and the crisp power delivery you depend on. The Wrench Rabbit Engine Rebuild Kit (WR101-067) consolidates every critical...09031063- SKU:
- 09031063
- Availability:
- Ships Same Business Day
- Weight:
- 13.95 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$985.95 -
Wrench Rabbit Engine Rebuild Kit for KTM 200 EXC 2003 WR101-090
WRENCH RABBIT
$985.95When your KTM 200 EXC engine reaches the end of its service life, a quality rebuild kit is the most cost-effective path back to reliable performance. The Wrench Rabbit Engine Rebuild Kit delivers all the critical internal components you need in one...09031065- SKU:
- 09031065
- Availability:
- Ships Same Business Day
- Weight:
- 15.23 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$985.95Qty in Cart: 0Quantity:Price:$985.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit Kawasaki KX250 2002-2003 WR101-114
WRENCH RABBIT
$867.95Two-stroke engines demand precision during rebuild—worn internals compromise power delivery and reliability. The Wrench Rabbit Complete Engine Rebuild Kit for your 2002-2003 Kawasaki KX250 eliminates guesswork by bundling OEM-quality components from...09031088- SKU:
- 09031088
- Availability:
- Ships Same Business Day
- Weight:
- 14.35 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$867.95 -
Wiseco Engine Rebuild Kit for 2009-2020 KTM 65 SX PWR161B-100
WISECO
$532.95When your KTM 65 SX needs more than a top-end refresh, a complete engine rebuild restores lost compression, eliminates wear in critical bearings, and brings your bike back to factory performance specs. The Wiseco PWR161B-100 kit eliminates the guesswork...09031539- SKU:
- 09031539
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- OVERBORE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 45.00 MM
- DISPLACEMENT:
- 65 CC
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$532.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 1992-2002 Honda CR80R WR101-010
WRENCH RABBIT
$526.95A complete engine rebuild demands precision components that work together seamlessly—and this Wrench Rabbit kit delivers exactly that. Whether you're restoring a worn CR80R or preparing for competitive riding, having OEM-quality internals pre-selected...09031057- SKU:
- 09031057
- Availability:
- Ships Same Business Day
- Weight:
- 8.40 LBS
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
$526.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2007-2009 Honda CRF150R WR101-177
WRENCH RABBIT
$867.95When your Honda CRF150R engine reaches the end of its service life, a complete rebuild is the most cost-effective path to restoring full performance and reliability. The Wrench Rabbit Engine Rebuild Kit eliminates the guesswork of sourcing individual...09031305- SKU:
- 09031305
- Availability:
- Ships Same Business Day
- Weight:
- 10.80 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$867.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF150R 2012-2016 WR101-178
WRENCH RABBIT
$867.95When your Honda CRF150R engine reaches the end of its service life, a complete rebuild kit eliminates the guesswork and ensures every critical component meets OEM specifications. The Wrench Rabbit WR101-178 bundles all the wear items and precision parts...09031306- SKU:
- 09031306
- Availability:
- Ships Same Business Day
- Weight:
- 9.15 LBS
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$867.95
