ATV/UTV Engine Rebuild Kits
ATV/UTV Engine Rebuild Kits at JJ Motorsports
Revive your ATV/UTV with complete engine rebuild kits from JJ Motorsports, featuring everything you need for a full top-to-bottom refresh on Yamaha Blaster, Polaris, Arctic Cat, Kawasaki, and Suzuki models. These all-in-one kits include pistons, gaskets, bearings, seals, and more for fast, reliable rebuilds and maximum performance.
Shop Wrench Rabbit and Wiseco rebuild kits for race-proven quality. Explore related categories such as ATV/UTV engine for individual components, or ATV/UTV for cams and exhaust to finish your build and ride with total confidence across all conditions, from high-speed dunes to technical trails.
Top ATV/UTV Engine Rebuild Kits
- Wrench Rabbit Engine Kit Arctic Cat/Kawasaki/Suzuki WR101-061 – Complete rebuild kit with Vertex piston, gaskets, bearings, and seals; fits multiple 400-450cc models.
- Wiseco Engine Kit Blaster 1988-2006 PWR105-665 – Full kit for Yamaha Blaster; forged piston, gaskets, crank bearings, and seals for legendary 2-stroke power.
- Wrench Rabbit Engine Kit Polaris WR00054 – Vertex-based complete kit for Polaris 500/570; includes piston, bearings, gaskets, and seals.
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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WSM Top End Kit - Standard - Kawasaki 54-252-10
WSM
$134.15A worn or damaged top end directly impacts engine performance, reliability, and fuel efficiency. The WSM Top End Kit delivers OEM-quality components engineered for Kawasaki 4-stroke engines, eliminating guesswork and ensuring proper ring seal, piston...09031376- SKU:
- 09031376
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$134.15 -
WSM Top End Kit - .25mm - Kawasaki 54-252-11
WSM
$125.25A complete top-end rebuild requires precision components that work in concert—and this WSM Top End Kit delivers exactly that. Whether you're restoring a tired engine or building for peak performance, having OEM-quality pistons, rings, and gaskets as a...09031377- SKU:
- 09031377
- Availability:
- Ships Same Business Day
- Weight:
- 1.60 LBS
- OVERBORE METRIC:
- +0.25 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
$125.25 -
WSM Top End Kit - .5mm - Kawasaki 54-255-12
WSM
$134.15A top-end rebuild demands precision components that restore your engine to factory performance standards or beyond. The WSM Top End Kit delivers a complete piston assembly solution, eliminating the need to source individual components and ensuring...09031383- SKU:
- 09031383
- Availability:
- Ships Same Business Day
- Weight:
- 1.35 LBS
- OVERBORE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$134.15Qty in Cart: 0Quantity:Price:$134.15Subtotal: -
WSM Top End Kit - Standard - Kawasaki 54-250-10
WSM
$134.15A top-end rebuild is essential for restoring compression, sealing, and combustion efficiency in your 4-stroke engine—especially after high-mileage operation or performance tuning. This WSM Top End Kit delivers OEM-quality components in a single package,...09031371- SKU:
- 09031371
- Availability:
- Ships Same Business Day
- Weight:
- 1.40 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- STANDARD
$134.15Qty in Cart: 0Quantity:Price:$134.15Subtotal: -
On Sale
Wiseco Engine Rebuild Kit for 2011-2016 Polaris Ranger 800 6x6 PWR223-800B
WISECO
MSRP: $1,399.95Now: $1,181.00Was: $1,399.95When your Polaris Ranger 800 6x6 engine shows signs of wear—increased blow-by, loss of compression, or metal in the oil—a full rebuild is the most cost-effective path back to reliability. The Wiseco PWR223-800B gives you OEM-quality components in one...09031686- SKU:
- 09031686
- Availability:
- Ships Same Business Day
- Weight:
- 25.65 LBS
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- UTV
- UNITS:
- KIT
MSRP: $1,399.95Now: $1,181.00Was: $1,399.95 -
Wrench Rabbit Engine Rebuild Kit for Honda TRX250X 2009-2019 WR00011
WRENCH RABBIT
$737.95When your Honda TRX250X shows signs of wear—rough idle, loss of compression, or coolant weeping—a complete engine rebuild restores it to factory specifications and reliability. The Wrench Rabbit WR00011 kit consolidates every internal component you'll...09031637- SKU:
- 09031637
- Availability:
- Ships Same Business Day
- Weight:
- 14.15 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$737.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2012-2013 Honda TRX420 Rancher WR00012
WRENCH RABBIT
$946.95When your Honda TRX420 Rancher shows signs of wear—hard starts, loss of power, or visible blow-by—a complete engine rebuild restores factory performance and reliability without the cost of replacement. The Wrench Rabbit WR00012 kit eliminates guesswork...09031638- SKU:
- 09031638
- Availability:
- Ships Same Business Day
- Weight:
- 20.85 LBS
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$946.95 -
Wrench Rabbit Engine Rebuild Kit for Honda TRX500FE 2005-2009 WR00036
WRENCH RABBIT
$1,132.95When your Honda TRX500FE starts showing signs of wear—loss of compression, oil leaks, or rough idle—a full engine rebuild is the most cost-effective path to restoring reliability and performance. The Wrench Rabbit Engine Rebuild Kit (WR00036) delivers...09031640- SKU:
- 09031640
- Availability:
- Ships Same Business Day
- Weight:
- 20.20 LBS
- RIDING STYLE:
- ATV
- RIDING STYLE:
- UTV
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,132.95Qty in Cart: 0Quantity:Price:$1,132.95Subtotal: -
Wrench Rabbit Complete Engine Rebuild Kit for 2005-2011 Honda TRX500FM WR00037
WRENCH RABBIT
$1,132.95When your Honda TRX500FM engine shows signs of wear—whether it's loss of compression, bearing knock, or diminished power output—a complete rebuild is often your most cost-effective path to restoration. The Wrench Rabbit Complete Engine Rebuild Kit...09031641- SKU:
- 09031641
- Availability:
- Ships Same Business Day
- Weight:
- 20.05 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$1,132.95 -
On Sale
Wrench Rabbit Engine Rebuild Kit for Honda TRX500FE 2012-2013 WR00039
WRENCH RABBIT
MSRP: $1,183.95Now: $758.00Was: $1,183.95A complete engine rebuild is a significant undertaking—and choosing the right kit makes the difference between a reliable restoration and premature failure. The Wrench Rabbit Engine Rebuild Kit for your Honda TRX500FE eliminates the guesswork by bundling...09031643- SKU:
- 09031643
- Availability:
- Ships Same Business Day
- Weight:
- 20.81 LBS
- RIDING STYLE:
- UTV
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
MSRP: $1,183.95Now: $758.00Was: $1,183.95Qty in Cart: 0Quantity:Price:MSRP: $1,183.95Now: $758.00Was: $1,183.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit for 2016 Polaris RZR 900 WR00040
WRENCH RABBIT
$1,994.95When your Polaris RZR 900 has accumulated serious hours, an engine rebuild becomes inevitable—and the Wrench Rabbit Engine Rebuild Kit eliminates the guesswork by bundling every critical component you'll need for a complete, reliable restoration. This...09031644- SKU:
- 09031644
- Availability:
- Ships Same Business Day
- Weight:
- 27.50 LBS
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$1,994.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2015 Polaris Ranger 900 XP WR00041
WRENCH RABBIT
$1,994.95When your Polaris Ranger 900 XP shows signs of wear—increased blow-by, loss of compression, or oil consumption—a complete engine rebuild restores factory performance and reliability without the cost of a new engine. This Wrench Rabbit kit supplies every...09031645- SKU:
- 09031645
- Availability:
- Ships Same Business Day
- Weight:
- 27.90 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- RIDING STYLE:
- UTV
$1,994.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2009 Suzuki LT-R450 WR101-102
WRENCH RABBIT
$1,211.95The Wrench Rabbit Complete Engine Rebuild Kit for your 2009 Suzuki LT-R450 gives you everything needed to restore your engine to factory specifications or exceed them with precision components. Whether you're dealing with worn piston rings, bearing wear,...09031049- SKU:
- 09031049
- Availability:
- Ships Same Business Day
- Weight:
- 16.85 LBS
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- ATV
- FEATURES:
- STANDARD COMPRESSION PISTON
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,211.95 -
WSM Top End Kit - .75mm - Honda 54-227-13
WSM
$157.44A worn top end compromises compression, power delivery, and fuel efficiency—leaving performance on the table. The WSM Top End Kit delivers a complete piston assembly with OEM-quality components, eliminating the hassle of sourcing individual gaskets,...09031349- SKU:
- 09031349
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- OVERBORE METRIC:
- +0.75 MM
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- PISTON KIT
$157.44 -
WSM Top End Kit - .25mm - Honda 54-228-11
WSM
$169.48A top-end rebuild is critical for maintaining peak engine performance and extending your 4-stroke's service life. The WSM Top End Kit delivers OEM-quality pistons and precision-machined components that restore compression, reduce blow-by, and eliminate...09031352- SKU:
- 09031352
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- UNITS:
- KIT
- OVERBORE METRIC:
- +0.25 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
$169.48Qty in Cart: 0Quantity:Price:$169.48Subtotal: -
WSM Top End Kit - .5mm - Honda 54-228-12
WSM
$177.95A worn or damaged top end directly compromises your engine's compression, power delivery, and reliability. The WSM Top End Kit gives you everything needed for a complete piston and gasket refresh, restoring your 4-stroke to peak performance without...09031353- SKU:
- 09031353
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- OVERBORE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$177.95 -
WSM Top End Kit - .75mm - Honda 54-228-13
WSM
$177.95A seized or worn top end forces you to choose between costly machine shop delays or unreliable DIY guesswork. The WSM Top End Kit delivers everything needed for a complete, factory-correct rebuild in one box—eliminating sourcing headaches and ensuring...09031354- SKU:
- 09031354
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- +0.75 MM
- UNITS:
- KIT
$177.95 -
WSM Top End Kit - Standard - Honda 54-229-10
WSM
$144.99A worn or damaged top end directly kills engine performance and reliability—this comprehensive piston kit restores your Honda's compression, combustion efficiency, and power delivery with factory-spec precision. WSM's complete assembly includes...09031356- SKU:
- 09031356
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$144.99 -
WSM Top End Kit - 1mm - Honda 54-226-14
WSM
$155.89A worn or damaged top end directly cuts into power output and reliability—rebuilding with quality components restores your engine's original performance envelope. The WSM Top End Kit delivers everything needed for a complete piston assembly refresh,...09031345- SKU:
- 09031345
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- OVERBORE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
$155.89 -
WSM Top End Kit - Standard - Honda 54-227-10
WSM
$149.94A top-end rebuild demands precision components that restore your engine's compression, sealing, and reliability—and this WSM kit delivers exactly that. Whether you're rebuilding after high-mileage wear or preparing for competitive use, this complete...09031346- SKU:
- 09031346
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$149.94Qty in Cart: 0Quantity:Price:$149.94Subtotal:
