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 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...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...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...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...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...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...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...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...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
$774.85When 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...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
$774.85 -
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...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...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
$985.95Qty in Cart: 0Quantity:Price:$985.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit for KTM 250 SX 2007-2015 WR101-067
WRENCH RABBIT
$1,035.25When 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...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
$1,035.25 -
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...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...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...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
$532.95Qty in Cart: 0Quantity:Price:$532.95Subtotal: -
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...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
$911.35When 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...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
$911.35 -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF150R 2012-2016 WR101-178
WRENCH RABBIT
$911.35When 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...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
$911.35Qty in Cart: 0Quantity:Price:$911.35Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF450X 2005-2009 2012-2016 WR101-179
WRENCH RABBIT
$1,132.95An engine rebuild is a critical investment in your Honda CRF450X's longevity and performance. The Wrench Rabbit Complete Engine Rebuild Kit eliminates guesswork by bundling every component you...09031307- SKU:
- 09031307
- Availability:
- Ships Same Business Day
- Weight:
- 17.10 LBS
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,132.95Qty in Cart: 0Quantity:Price:$1,132.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX250 2014-2016 WR101-175
WRENCH RABBIT
$1,211.95When your Kawasaki KX250 two-stroke demands a complete overhaul, settling for partial solutions risks reliability and performance. The Wrench Rabbit Complete Engine Rebuild Kit delivers everything...09031308- SKU:
- 09031308
- Availability:
- Ships Same Business Day
- Weight:
- 12.20 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
$1,211.95Qty in Cart: 0Quantity:Price:$1,211.95Subtotal:
