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
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Wrench Rabbit Engine Rebuild Kit KTM 200 XC-W 2013-2014 WR101-154
WRENCH RABBIT
$912.95WRENCH RABBIT Engine Kit KTM WR101-154 Revitalize your KTM WR101-154 with the WRENCH RABBIT Engine Kit, designed for enthusiasts seeking a comprehensive and professional rebuild solution. This all-in-one kit includes high-quality components to ensure...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
$912.95 -
Wiseco Engine Rebuild Kit for Suzuki RM250 2003-2004 PWR165A-100
WISECO
$664.95WISECO Engine Kit RM250 2003-2004 PWR165A-100 Revitalize your RM250 with the WISECO Engine Kit, engineered for optimal performance and longevity. This comprehensive kit includes everything you need for a complete engine rebuild, ensuring your bike runs...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
$664.95 -
Wiseco Engine Rebuild Kit Suzuki RM250 2005-2010 PWR165B-100
WISECO
$664.95WISECO Complete Engine Rebuild Kit for RM250 (2005-2010) Revitalize your RM250 with the WISECO Engine Kit, designed for a comprehensive top and bottom-end rebuild. This all-inclusive kit ensures your engine performs at its peak, featuring a meticulously...09031545- SKU:
- 09031545
- Availability:
- Ships Same Business Day
- Weight:
- 13.95 LBS
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 66.40 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 250 CC
- FEATURES:
- PROLITE® PISTON
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$664.95Qty in Cart: 0Quantity:Price:$664.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit for Suzuki RMZ450 2008-2012 WR101-076
WRENCH RABBIT
$1,193.95WRENCH RABBIT Engine Kit for Suzuki WR101-076 Revitalize your Suzuki with the WRENCH RABBIT Engine Kit, a comprehensive solution designed for a seamless and professional rebuild. This all-in-one kit includes high-quality components that ensure optimal...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
$1,193.95 -
Wrench Rabbit Yamaha YZ125 2005-2016 Complete Engine Rebuild Kit WR101-081
WRENCH RABBIT
$682.95WRENCH RABBIT Engine Kit for Yamaha WR101-081 Revitalize your Yamaha WR with the WRENCH RABBIT Engine Kit, a comprehensive solution designed for a seamless and professional rebuild. This all-in-one kit includes high-quality components that ensure optimal...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
$682.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX80 1998-2000 WR101-011
WRENCH RABBIT
$548.95WRENCH RABBIT Engine Kit for Kawasaki WR101-011 Revitalize your Kawasaki with the WRENCH RABBIT Engine Kit, designed for a comprehensive and professional rebuild. This all-in-one solution includes high-quality components to ensure optimal performance and...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
$548.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2007-2015 KTM 125 SX WR101-216
WRENCH RABBIT
$912.95WRENCH RABBIT Engine Kit KTM WR101-216 Revitalize your KTM with the WRENCH RABBIT Engine Kit, designed for a seamless and professional engine rebuild. This comprehensive kit includes everything you need for optimal performance and reliability, ensuring...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
$912.95 -
Wrench Rabbit Engine Rebuild Kit for KTM 250 SX 2007-2015 WR101-067
WRENCH RABBIT
$912.95WRENCH RABBIT Engine Kit KTM WR101-067 Revitalize your KTM with the WRENCH RABBIT Engine Kit, the ultimate solution for a complete and professional rebuild. This all-in-one package includes everything you need to restore your engine to peak performance,...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
$912.95 -
Wrench Rabbit Engine Rebuild Kit for KTM 200 EXC 2003 WR101-090
WRENCH RABBIT
$912.95WRENCH RABBIT Engine Kit KTM WR101-090 Revitalize your KTM with the WRENCH RABBIT Engine Kit, a comprehensive solution for a complete and professional engine rebuild. This all-in-one kit includes high-quality components designed to restore your engine's...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
$912.95 -
Wrench Rabbit Complete Engine Rebuild Kit Kawasaki KX250 2002-2003 WR101-114
WRENCH RABBIT
$803.95WRENCH RABBIT Engine Kit for Kawasaki WR101-114 Revitalize your Kawasaki with the WRENCH RABBIT Engine Kit, designed for a seamless and professional rebuild. This comprehensive kit includes all essential components, ensuring your engine performs at its...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
$803.95 -
Wiseco Engine Rebuild Kit 2002-2006 KTM 125 SX PWR153-101
WISECO
$664.95WISECO Engine Rebuild Kit PWR153-101 Revitalize your engine with the WISECO Engine Rebuild Kit PWR153-101, designed for both performance and longevity. This comprehensive kit includes everything you need for a complete engine overhaul, ensuring your...09031616- SKU:
- 09031616
- Availability:
- Ships Same Business Day
- Weight:
- 10.55 LBS
- BORE SIZE METRIC:
- 54.00 MM
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$664.95Qty in Cart: 0Quantity:Price:$664.95Subtotal: -
Wiseco Engine Rebuild Kit for 2004-2012 KTM 85 SX PWR162-100
WISECO
$469.95WISECO Engine Kit for 85SX (2004-2012) - PWR162-100 Revitalize your 85SX with the WISECO Engine Kit, engineered for peak performance and reliability. This comprehensive kit includes everything you need for a complete engine rebuild, ensuring your bike...09031540- SKU:
- 09031540
- Availability:
- Ships Same Business Day
- Weight:
- 7.70 LBS
- BORE SIZE METRIC:
- 47.00 MM
- FEATURES:
- GP SERIES PISTON
- UNITS:
- KIT
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- OFF-ROAD
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$469.95Qty in Cart: 0Quantity:Price:$469.95Subtotal: -
Wiseco Engine Rebuild Kit for 2009-2020 KTM 65 SX PWR161B-100
WISECO
$469.95WISECO Engine Kit 65SX PWR161B-100 Revitalize your engine with the WISECO Engine Kit 65SX PWR161B-100, expertly crafted to provide everything you need for a complete rebuild. This comprehensive kit ensures optimal performance and longevity, featuring...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
$469.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 1992-2002 Honda CR80R WR101-010
WRENCH RABBIT
$487.95WRENCH RABBIT Engine Kit for Honda WR101-010 Revitalize your Honda engine with the WRENCH RABBIT Engine Kit, an all-in-one solution designed for a seamless and professional rebuild. This comprehensive kit includes high-quality components that ensure...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
$487.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2007-2009 Honda CRF150R WR101-177
WRENCH RABBIT
$803.95WRENCH RABBIT Engine Kit for Honda WR101-177 Revitalize your Honda engine with the WRENCH RABBIT Engine Kit, designed for a seamless and professional rebuild experience. This all-in-one solution includes high-quality components to ensure optimal...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
$803.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF150R 2012-2016 WR101-178
WRENCH RABBIT
$803.95WRENCH RABBIT Engine Kit for Honda WR101-178 Revitalize your Honda with the WRENCH RABBIT Engine Kit, designed for a seamless and professional rebuild. This comprehensive kit includes all essential components, ensuring your engine operates at peak...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
$803.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Honda CRF450X 2005-2009 2012-2016 WR101-179
WRENCH RABBIT
$1,048.95WRENCH RABBIT Engine Kit for Honda WR101-179 Revitalize your Honda engine with the WRENCH RABBIT Engine Kit, designed for a seamless and professional rebuild. This comprehensive kit includes all essential components, ensuring your engine runs smoothly...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
$1,048.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KX250 2014-2016 WR101-175
WRENCH RABBIT
$1,121.95WRENCH RABBIT Engine Kit for Kawasaki WR101-175 Revitalize your Kawasaki WR101-175 with the WRENCH RABBIT Engine Kit, designed for enthusiasts seeking a comprehensive rebuild solution. This all-in-one kit provides everything you need for a...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
$1,121.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2015 Kawasaki KX450F WR101-174
WRENCH RABBIT
$1,121.95WRENCH RABBIT Engine Kit for Kawasaki WR101-174 Revitalize your Kawasaki with the WRENCH RABBIT Engine Kit, designed for a seamless and professional rebuild. This comprehensive kit includes all essential components to restore your engine's performance,...09031309- SKU:
- 09031309
- Availability:
- Ships Same Business Day
- Weight:
- 16.05 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- STANDARD COMPRESSION PISTON
- UNITS:
- KIT
$1,121.95 -
Wrench Rabbit Kawasaki KX85 2014-2025 Complete Engine Rebuild Kit WR101-170
WRENCH RABBIT
$730.95WRENCH RABBIT Engine Kit for Kawasaki WR101-170 Revitalize your Kawasaki engine with the WRENCH RABBIT Engine Kit, designed for a seamless and professional rebuild. This comprehensive kit includes all the essential components to ensure optimal...09031310- SKU:
- 09031310
- Availability:
- Ships Same Business Day
- Weight:
- 8.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
$730.95
