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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Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YFZ350 Banshee 1987-2006 WR101-077
WRENCH RABBIT
$1,288.95When your Yamaha YFZ350 Banshee's engine shows signs of wear, a complete rebuild is the only way to restore factory performance and reliability. The Wrench Rabbit Complete Engine Rebuild Kit bundles every critical component you need in one package,...09031012- SKU:
- 09031012
- Availability:
- Ships Same Business Day
- Weight:
- 20.20 LBS
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
$1,288.95Qty in Cart: 0Quantity:Price:$1,288.95Subtotal: -
Wrench Rabbit Yamaha YFZ450 2004-2005 Engine Rebuild Kit WR101-078
WRENCH RABBIT
$1,132.95When your Yamaha YFZ450 engine shows signs of wear—loss of compression, hard starting, or worn bearings—a complete rebuild is the most cost-effective path to restoring full performance and reliability. The Wrench Rabbit WR101-078 kit eliminates the...09031013- SKU:
- 09031013
- Availability:
- Ships Same Business Day
- Weight:
- 15.90 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$1,132.95 -
Wrench Rabbit Complete Engine Rebuild Kit Yamaha YFZ450 2006-2009 WR101-079
WRENCH RABBIT
$1,132.95When your Yamaha YFZ450 engine reaches the end of its service life, a complete rebuild is the most cost-effective path to restoring full performance and reliability. This Wrench Rabbit kit eliminates the guesswork of sourcing individual components—it...09031014- SKU:
- 09031014
- Availability:
- Ships Same Business Day
- Weight:
- 16.00 LBS
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- ATV
$1,132.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YFM700R Raptor 2006-2014 WR101-135
WRENCH RABBIT
$1,315.95When your Yamaha YFM700R Raptor reaches the end of its service life, a complete engine rebuild restores it to factory specifications—and this kit gives you everything needed to do it right the first time. Rather than sourcing components piecemeal, the...09031050- SKU:
- 09031050
- Availability:
- Ships Same Business Day
- Weight:
- 25.20 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$1,315.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Yamaha YFM700 Grizzly 2007-2013 WR101-136
WRENCH RABBIT
$1,381.95If your Yamaha YFM700 Grizzly has logged serious miles or experienced bearing wear, a complete engine rebuild is the most cost-effective path to restoring reliability and performance. The Wrench Rabbit WR101-136 kit bundles all critical internal...09031051- SKU:
- 09031051
- Availability:
- Ships Same Business Day
- Weight:
- 25.70 LBS
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- ATV
$1,381.95 -
Wrench Rabbit Engine Kit Yamaha YFZ350 Banshee 1987-2006 WR101-077
WRENCH RABBIT
$1,249.95A two-stroke engine rebuild demands precision and reliability—components that wear or fail can leave you stranded or compromise performance. The Wrench Rabbit Engine Kit for your Yamaha YFZ350 Banshee eliminates guesswork by bundling all critical...09031052- SKU:
- 09031052
- Availability:
- Ships Same Business Day
- Weight:
- 23.45 LBS
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- UTV
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
$1,249.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Kawasaki KFX450R 2008-2014 WR101-138
WRENCH RABBIT
$1,132.95When your Kawasaki KFX450R's engine has logged serious hours on the track or trail, a complete rebuild restores reliability and performance without sourcing individual components. The Wrench Rabbit WR101-138 bundles all critical internal parts—pistons,...09031053- SKU:
- 09031053
- Availability:
- Ships Same Business Day
- Weight:
- 23.60 LBS
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- MODEL:
- WRENCH RABBIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
$1,132.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2010-2011 Yamaha YFZ450X WR101-147
WRENCH RABBIT
$1,249.95When your Yamaha YFZ450X engine reaches the end of its service life, a quality rebuild kit saves you thousands compared to sourcing components individually and eliminates compatibility guesswork. The Wrench Rabbit Complete Engine Rebuild Kit supplies...09031054- SKU:
- 09031054
- Availability:
- Ships Same Business Day
- Weight:
- 16.90 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,249.95 -
Wrench Rabbit Engine Rebuild Kit for 2018 Polaris RZR XP 1000 EPS WR00051
WRENCH RABBIT
$1,994.95When your 2018 Polaris RZR XP 1000 EPS reaches the point where an engine rebuild is necessary, the Wrench Rabbit Engine Rebuild Kit (WR00051) provides everything required to restore full performance and reliability. This comprehensive kit eliminates the...09031655- SKU:
- 09031655
- Availability:
- Ships Same Business Day
- Weight:
- 32.50 LBS
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,994.95 -
Wrench Rabbit Engine Rebuild Kit for 2016-2017 Polaris RZR XP 1000 WR00050
WRENCH RABBIT
$1,994.95When engine wear compromises the reliability of your RZR XP 1000, a complete rebuild restores factory performance and extends service life. The Wrench Rabbit WR00050 kit consolidates all critical internal components into one comprehensive package,...09031654- SKU:
- 09031654
- Availability:
- Ships Same Business Day
- Weight:
- 31.20 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- UTV
- UNITS:
- KIT
$1,994.95 -
Wrench Rabbit Yamaha YFS200 Blaster 1988-1997 Complete Engine Rebuild Kit WR101-155
WRENCH RABBIT
$788.95When your Yamaha YFS200 Blaster's engine has logged serious hours, a complete rebuild isn't just maintenance—it's insurance against catastrophic failure and a path back to factory performance. The Wrench Rabbit WR101-155 kit eliminates the guesswork of...09031055- SKU:
- 09031055
- Availability:
- Ships Same Business Day
- Weight:
- 11.10 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- WRENCH RABBIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$788.95 -
WSM Top End Kit - .75mm - Honda 54-230-13
WSM
$177.49A top-end rebuild is critical maintenance for any 4-stroke engine demanding reliability and performance. This WSM Top End Kit delivers OEM-quality components in a single package, eliminating the guesswork and multiple orders. Whether you're refreshing a...09031364- SKU:
- 09031364
- Availability:
- Ships Same Business Day
- Weight:
- 1.85 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- +0.75 MM
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$177.49 -
WSM Top End Kit - .25mm - Honda 54-231-11
WSM
$178.77A worn or damaged top end directly impacts your engine's compression, efficiency, and power output—making a quality piston kit essential for any serious rebuild. The WSM Top End Kit delivers OEM-grade components in one complete package, eliminating the...09031367- SKU:
- 09031367
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- +0.25 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$178.77Qty in Cart: 0Quantity:Price:$178.77Subtotal: -
WSM Top End Kit - .5mm - Honda 54-231-12
WSM
$191.47A worn or damaged top end compromises your engine's compression, efficiency, and reliability—especially critical in high-RPM racing or demanding trail conditions. The WSM Top End Kit delivers OEM-quality pistons and precision components in a complete...09031368- SKU:
- 09031368
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- OVERBORE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$191.47 -
WSM Top End Kit - .5mm - Kawasaki 54-250-12
WSM
$134.15A worn or damaged top-end requires more than just a piston swap—it demands a complete, precision-matched kit to restore your engine's compression, seal integrity, and power delivery. The WSM Top End Kit gives you everything needed in one package,...09031373- SKU:
- 09031373
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- +0.50 MM
- UNITS:
- KIT
- PRODUCT NAME:
- PISTON KIT
$134.15 -
WSM Top End Kit - Arctic Cat - Standard 54-254-10
WSM
$229.40A worn or damaged top end directly impacts your Arctic Cat's power output, fuel efficiency, and engine longevity. This WSM Top End Kit delivers OEM-equivalent quality components in a single package, eliminating the guesswork of sourcing individual parts...09031466- SKU:
- 09031466
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- OVERBORE METRIC:
- STANDARD
- PRODUCT NAME:
- PISTON KIT
$229.40Qty in Cart: 0Quantity:Price:$229.40Subtotal: -
WSM Top End Kit - .5mm - Suzuki/Kawasaki 400 54-254-12
WSM
$214.20A worn or damaged top end directly impacts engine compression, fuel efficiency, and overall reliability—making a quality piston kit essential for maintaining peak performance. The WSM Top End Kit gives you OEM-grade components in a complete package,...09031468- SKU:
- 09031468
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- +0.50 MM
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$214.20 -
WSM Top End Kit - .75mm - Suzuki/Kawasaki 400 54-254-13
WSM
$214.20A worn or damaged top end directly kills engine performance and reliability. The WSM Top End Kit delivers a complete, OEM-quality rebuild solution that restores compression, sealing, and power output without compromise. Whether you're rebuilding after...09031469- SKU:
- 09031469
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- +0.75 MM
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$214.20 -
WSM Top End Kit - 1mm - Suzuki/Kawasaki 400 54-254-14
WSM
$214.20A worn or damaged top end doesn't just kill performance—it compromises reliability when you need it most. The WSM Top End Kit gives you everything required for a complete piston and gasket refresh on your Suzuki or Kawasaki 400, restoring compression and...09031470- SKU:
- 09031470
- Availability:
- Ships Same Business Day
- Weight:
- 1.95 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- OVERBORE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
$214.20Qty in Cart: 0Quantity:Price:$214.20Subtotal: -
WSM Top End Kit - Standard - Honda 200 54-222-10
WSM
$93.40A worn or damaged top end compromises power delivery and fuel efficiency, cutting short your engine's service life. The WSM Top End Kit delivers OEM-quality components in a single package, eliminating the guesswork of sourcing individual parts and...09031471- SKU:
- 09031471
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$93.40
