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
-
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...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: -
WSM Top End Kit - .25mm - Honda 54-227-11
WSM
$157.44A top-end rebuild is essential for restoring compression, sealing, and performance in high-mileage 4-stroke engines. The WSM Top End Kit delivers OEM-quality components in a single package,...09031347- SKU:
- 09031347
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- OVERBORE METRIC:
- +0.25 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
$157.44 -
WSM Top End Kit - Standard - Honda 54-228-10
WSM
$177.95A worn top end compromises compression, throttle response, and fuel efficiency—costing you power and reliability on every run. The WSM Top End Kit delivers OEM-equivalent quality components...09031351- SKU:
- 09031351
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$177.95Qty in Cart: 0Quantity:Price:$177.95Subtotal: -
WSM Top End Kit - 1mm - Honda 54-229-14
WSM
$138.09A top-end rebuild is non-negotiable for maintaining peak combustion efficiency and horsepower delivery in your 4-stroke engine. The WSM Top End Kit supplies everything needed for a complete piston...09031360- SKU:
- 09031360
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- +1.00 MM
- PRODUCT NAME:
- PISTON KIT
$138.09Qty in Cart: 0Quantity:Price:$138.09Subtotal: -
Wiseco Engine Rebuild Kit for 2001-2004 Honda TRX400EX PWR131A-870
WISECO
$844.95A complete engine rebuild demands precision components that won't compromise reliability when you need it most. This Wiseco kit delivers OEM-spec or better parts for the 400EX platform, eliminating...09031514- SKU:
- 09031514
- Availability:
- Ships Same Business Day
- Weight:
- 15.85 LBS
$844.95Qty in Cart: 0Quantity:Price:$844.95Subtotal: -
WSM Top End Kit - Standard - Honda 54-231-10
WSM
$191.47A worn or damaged top end compromises engine efficiency and reliability—this complete piston kit gives you the precision components needed to restore or upgrade your 4-stroke Honda's combustion...09031366- SKU:
- 09031366
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- OVERBORE METRIC:
- STANDARD
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
$191.47Qty in Cart: 0Quantity:Price:$191.47Subtotal: -
WSM Top End Kit - 1mm - Honda 200 54-222-14
WSM
$88.95A worn or damaged top-end demands immediate attention—neglecting it risks catastrophic engine failure and sidelines your machine. The WSM Top End Kit delivers OEM-quality components engineered to...09031475- SKU:
- 09031475
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- OVERBORE METRIC:
- +1.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$88.95Qty in Cart: 0Quantity:Price:$88.95Subtotal: -
WSM Top End Kit - Standard - Honda 300 54-219-10
WSM
$129.51Engine wear compromises both reliability and power output, making a quality top-end rebuild essential for maintaining peak performance. The WSM Top End Kit delivers OEM-grade components in one...09031476- SKU:
- 09031476
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- STANDARD
$129.51Qty in Cart: 0Quantity:Price:$129.51Subtotal: -
WSM Top End Kit - .5mm - Honda 300 54-219-12
WSM
$135.31A worn or damaged top end can rob your Honda 300 of power, efficiency, and reliability. This comprehensive WSM top end kit delivers everything needed for a complete piston-to-head rebuild, restoring...09031477- SKU:
- 09031477
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- +0.50 MM
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
$135.31Qty in Cart: 0Quantity:Price:$135.31Subtotal: -
WSM Top End Kit - Standard - Honda 420 54-231-20
WSM
$191.47A properly assembled top end is the foundation of reliable 4-stroke performance, and the WSM Top End Kit eliminates guesswork by delivering factory-quality components in one package. Whether you're...09031479- SKU:
- 09031479
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$191.47 -
Wiseco Engine Kit for Yamaha Warrior 350 1987-2004 PWR137-830
WISECO
$754.95A worn-out or damaged YFM350 engine demands a complete, quality rebuild—not patchwork repairs that compromise reliability. The Wiseco Engine Kit delivers everything needed for a full top-end and...09031521- SKU:
- 09031521
- Availability:
- Ships Same Business Day
- Weight:
- 15.90 LBS
$754.95Qty in Cart: 0Quantity:Price:$754.95Subtotal: -
Wiseco Engine Rebuild Kit Yamaha YFM350 Warrior 1987-2004 PWR137-840
WISECO
$754.95Engine wear is inevitable, but premature failure isn't. The Wiseco PWR137-840 Engine Rebuild Kit delivers all the precision components you need to restore your YFM350 Warrior to factory performance...09031523- SKU:
- 09031523
- Availability:
- Ships Same Business Day
- Weight:
- 15.25 LBS
$754.95Qty in Cart: 0Quantity:Price:$754.95Subtotal: -
Wiseco Engine Kit for Yamaha Grizzly 660 2002-2008 PWR148-100
WISECO
$1,044.95If you're facing worn piston rings, a scored cylinder, or metal fatigue in your Grizzly 660's engine, a complete rebuild is your path back to reliable performance. The Wiseco Engine Kit gives you...09031534- SKU:
- 09031534
- Availability:
- Ships Same Business Day
- Weight:
- 19.60 LBS
$1,044.95Qty in Cart: 0Quantity:Price:$1,044.95Subtotal: -
Wrench Rabbit Engine Rebuild Kit for Honda TRX400EX 1999-2004 WR101-195
WRENCH RABBIT
$711.95When your TRX400EX engine shows signs of wear—whether it's compression loss, bearing play, or seal degradation—a complete rebuild is the only path to restoring original performance and reliability...09031446- SKU:
- 09031446
- Availability:
- Ships Same Business Day
- Weight:
- 17.40 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- KIT CONTAINS +3 MM PISTON
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
$711.95Qty in Cart: 0Quantity:Price:$711.95Subtotal: -
WSM Top-End Rebuild Kit - .50 mm 54-520-12P
WSM
$236.67A complete top-end rebuild requires precision components that can handle sustained RPM and combustion pressures—and the WSM .50 mm kit delivers exactly that. Whether you're refreshing a worn engine...5452012- SKU:
- 5452012
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 64.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- PISTON SIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$236.67Qty in Cart: 0Quantity:Price:$236.67Subtotal: -
WSM Top-End Rebuild Kit - 1 mm 54-520-14P
WSM
$248.50A top-end rebuild demands precision components that restore your engine to factory specifications—or exceed them. The WSM Top-End Rebuild Kit delivers OEM-quality pistons, rings, and gaskets in one...5452014- SKU:
- 5452014
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- BORE SIZE METRIC:
- 65.00 MM
- TYPE:
- TOP END
- PISTON MATERIAL:
- ALUMINUM
- PISTON SIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- REBUILD KIT
- UNITS:
- EACH
$248.50Qty in Cart: 0Quantity:Price:$248.50Subtotal: -
WSM Top-End Rebuild Kit - .50 mm 54-530-12P
WSM
$138.01A top-end rebuild is essential maintenance for any racing engine experiencing wear, lost compression, or performance degradation. The WSM Top-End Rebuild Kit delivers OEM-quality components in a...5453012- SKU:
- 5453012
- Availability:
- Ships Same Business Day
- Weight:
- 1.19 LBS
- PISTON SIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 66.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
$138.01Qty in Cart: 0Quantity:Price:$138.01Subtotal: -
WSM Top-End Rebuild Kit - 1 mm 54-530-14P
WSM
$144.91A top-end rebuild kit is essential when your engine shows signs of wear—loss of compression, increased blow-by, or declining performance. The WSM 54-530-14P delivers premium components engineered to...5453014- SKU:
- 5453014
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE SIZE METRIC:
- 67.00 MM
- PISTON SIZE METRIC:
- +1.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$144.91Qty in Cart: 0Quantity:Price:$144.91Subtotal: -
WSM Top-End Rebuild Kit - Standard 54-310-10P
WSM
$155.52A worn top-end doesn't just cost you power—it costs you consistency and reliability on the track or street. The WSM Top-End Rebuild Kit gives you OEM-equivalent or better components in one complete...09031027- SKU:
- 09031027
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 74.50 MM
- PISTON SIZE METRIC:
- STANDARD
$155.52Qty in Cart: 0Quantity:Price:$155.52Subtotal: -
WSM Top-End Rebuild Kit - .25 mm 54-310-11P
WSM
$163.30A complete top-end rebuild requires precision-engineered components that work in perfect harmony—and this WSM kit delivers exactly that. Whether you're refreshing a tired engine or preparing for race...09031028- SKU:
- 09031028
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- PISTON SIZE METRIC:
- +0.25 MM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 74.75 MM
- PRODUCT NAME:
- REBUILD KIT
$163.30Qty in Cart: 0Quantity:Price:$163.30Subtotal:
