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 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...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...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...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...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...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...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
$592.95Qty in Cart: 0Quantity:Price:$592.95Subtotal: -
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...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...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...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...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...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...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...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...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
$946.95Qty in Cart: 0Quantity:Price:$946.95Subtotal: -
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...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
$946.95Qty in Cart: 0Quantity:Price:$946.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit Kawasaki KX65 2006-2012 WR101-051
WRENCH RABBIT
$592.95Two-stroke engines demand precision during rebuild, and cutting corners on component quality will cost you performance and reliability. The Wrench Rabbit Engine Rebuild Kit delivers every critical...09030989- SKU:
- 09030989
- Availability:
- Ships Same Business Day
- Weight:
- 7.55 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- MODEL:
- WRENCH RABBIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$592.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2003-2004 Suzuki RM250 WR101-063
WRENCH RABBIT
$946.95A two-stroke engine rebuild demands precision and reliability—this Wrench Rabbit kit delivers both with OEM-quality components engineered specifically for your RM250. Rather than sourcing pistons,...09031001- SKU:
- 09031001
- Availability:
- Ships Same Business Day
- Weight:
- 14.50 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
$946.95Qty in Cart: 0Quantity:Price:$946.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit 2002-2004 Honda CR250R WR101-015
WRENCH RABBIT
$828.95A two-stroke engine rebuild demands precision components that work together as a system—not mismatched parts that compromise reliability. This Wrench Rabbit kit eliminates guesswork by pairing...09030955- SKU:
- 09030955
- Availability:
- Ships Same Business Day
- Weight:
- 14.10 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- MODEL:
- WRENCH RABBIT
- ENGINE TYPE:
- 2-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$828.95 -
Vertex Engine Rebuild Kit for 2016-2017 Honda CRF250R WR101-219
WRENCH RABBIT
$1,092.95When your Honda CRF250R's engine shows signs of wear—lost compression, increased blowby, or declining power delivery—a complete engine rebuild is the most cost-effective path to restored performance...09030959- SKU:
- 09030959
- Availability:
- Ships Same Business Day
- Weight:
- 12.70 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 -
WSM Motor Mount - U150 011-102
WSM
$51.13Worn or damaged motor mounts compromise engine stability, increase vibration transfer to the chassis, and can accelerate wear on surrounding components. The WSM Motor Mount U150 011-102 restores...09330006- SKU:
- 09330006
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- MOUNT
- UNITS:
- EACH
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- ENGINE
$51.13
