Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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Wrench Rabbit Engine Rebuild Kit for 1997-2001 Honda CR250R WR101-014
WRENCH RABBIT
$867.95A 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 guesswork by bundling every critical part you'll need for...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
$867.95 -
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 guesswork by bundling every critical component—pistons,...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
$499.95Two-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 complete, factory-quality solution with OEM-equivalent...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
$499.95 -
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 the guesswork by bundling every critical...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 performance. The Wrench Rabbit Engine Rebuild Kit for the 2006...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 critical component you need for a professional-grade...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
$1,052.95When 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. The Wrench Rabbit Engine Rebuild Kit eliminates the...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
$1,052.95 -
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 internals, restoring a high-mileage engine, or preparing...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 everything needed for a professional-grade bottom-end and...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 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 Complete Engine Rebuild Kit eliminates the guesswork...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 reliability and performance. The Wrench Rabbit Engine Rebuild...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 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 one complete package. This kit saves you from sourcing...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 everything you need in one box—Vertex pistons, Hot Rods...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 components and risk compatibility issues, this all-in-one...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 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 Rabbit Engine Rebuild Kit eliminates the guesswork by...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
$1,157.95 -
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 individual components—everything you need for a...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 -
Wrench Rabbit Engine Rebuild Kit for 2010-2012 Kawasaki KX 450 F WR101-046
WRENCH RABBIT
$1,211.95When your KX 450 F reaches the end of its service life, a complete engine rebuild is the most cost-effective path back to peak performance. The Wrench Rabbit Engine Rebuild Kit eliminates the guesswork by bundling OEM-quality components—pistons,...09030984- SKU:
- 09030984
- Availability:
- Ships Same Business Day
- Weight:
- 16.25 LBS
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$1,211.95 -
Wrench Rabbit Engine Rebuild Kit Kawasaki KX65 2000-2001 WR101-047
WRENCH RABBIT
$592.95When your Kawasaki KX65 shows signs of wear—loss of compression, excessive blow-by, or sluggish throttle response—an engine rebuild restores it to factory performance specs without the downtime of sourcing individual components. The Wrench Rabbit Engine...09030985- SKU:
- 09030985
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- RIDING STYLE:
- OFF-ROAD
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- UNITS:
- KIT
$592.95 -
Wrench Rabbit Engine Rebuild Kit for 2005 Kawasaki KX65 WR101-050
WRENCH RABBIT
$564.95When your KX65's engine reaches the end of its service life, a quality rebuild kit is the fastest path back to reliable performance. The Wrench Rabbit Engine Rebuild Kit supplies every critical internal component you need—pistons, crankshaft, bearings,...09030988- SKU:
- 09030988
- Availability:
- Ships Same Business Day
- Weight:
- 8.25 LBS
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$564.95 -
Wrench Rabbit Kawasaki KX85 2007-2013 Complete Engine Rebuild Kit WR101-052
WRENCH RABBIT
$618.95When your KX85's engine reaches the end of its service life, a complete rebuild restores full performance and reliability without the cost of a replacement powerplant. This Wrench Rabbit kit eliminates the guesswork by bundling every critical...09030990- SKU:
- 09030990
- Availability:
- Ships Same Business Day
- Weight:
- 8.85 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- OFF-ROAD
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$618.95
