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 - .25mm - Honda 200 54-222-11
WSM
$93.40A worn or damaged top end directly impacts compression, power delivery, and engine reliability. The WSM Top End Kit gives you everything needed for a complete piston and gasket refresh, restoring your Honda 200 to factory performance specs or beyond...09031472- SKU:
- 09031472
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- PRODUCT NAME:
- PISTON KIT
- OVERBORE METRIC:
- +0.25 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$93.40Qty in Cart: 0Quantity:Price:$93.40Subtotal: -
WSM Top End Kit - .5mm - Honda 200 54-222-12
WSM
$93.40A worn or damaged top end directly compromises engine efficiency, compression, and reliability—especially under racing conditions where precision tolerances are critical. The WSM Top End Kit delivers a complete piston assembly with OEM-grade components,...09031473- SKU:
- 09031473
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- OVERBORE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$93.40 -
WSM Top End Kit - .25mm - Honda 420 54-231-21
WSM
$191.47A top-end rebuild is one of the most critical maintenance intervals for any 4-stroke engine, and cutting corners with inferior components will cost you performance and reliability when it matters most. The WSM Top End Kit delivers OEM-quality pistons and...09031480- SKU:
- 09031480
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- OVERBORE METRIC:
- +0.25 MM
- RIDING STYLE:
- ATV
$191.47 -
WSM Top End Kit - .5mm - Honda 420 54-231-22
WSM
$182.35A worn or damaged top end directly compromises combustion efficiency, power output, and engine reliability—especially critical in high-performance 4-stroke applications where precision tolerances define the difference between a competitive edge and...09031481- SKU:
- 09031481
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- OVERBORE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$182.35Qty in Cart: 0Quantity:Price:$182.35Subtotal: -
PROX Engine Rebuild Kit 10.EK5806.A
PROX
$1,110.95A complete engine rebuild requires precision components that restore your engine to OEM specifications or better. The PROX Engine Rebuild Kit 10.EK5806.A delivers comprehensive gasket sets, seals, and internal hardware designed to eliminate leaks, ensure...09031687- SKU:
- 09031687
- Availability:
- Ships Same Business Day
- Weight:
- 25.51 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- UTV
- BORE SIZE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$1,110.95 -
PROX Engine Rebuild Kit 10.EK5806.B
PROX
$1,099.95A complete engine rebuild requires precision-engineered components that restore your engine to OEM specifications or better. The PROX Engine Rebuild Kit 10.EK5806.B delivers the critical internal components you need to ensure proper ring sealing, bearing...09031688- SKU:
- 09031688
- Availability:
- Ships Same Business Day
- Weight:
- 25.56 LBS
- RIDING STYLE:
- UTV
- BORE SIZE METRIC:
- +0.01 MM
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
$1,099.95 -
PROX Engine Rebuild Kit 10.EK5806.A1
PROX
$1,110.95A complete engine rebuild demands precision components that restore your engine to factory specifications—or better. The PROX Engine Rebuild Kit 10.EK5806.A1 delivers OEM-quality internal parts in one package, eliminating the guesswork of sourcing...09031690- SKU:
- 09031690
- Availability:
- Ships Same Business Day
- Weight:
- 26.61 LBS
- BORE SIZE METRIC:
- STANDARD
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
$1,110.95Qty in Cart: 0Quantity:Price:$1,110.95Subtotal: -
PROX Engine Rebuild Kit 10.EK5805.A1
PROX
$1,099.95A complete engine rebuild requires precision components that restore your engine to OEM specifications while maintaining the durability your high-performance builds demand. The PROX Engine Rebuild Kit 10.EK5805.A1 delivers factory-quality internal...09031696- SKU:
- 09031696
- Availability:
- Ships Same Business Day
- Weight:
- 25.61 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- STANDARD
- RIDING STYLE:
- UTV
$1,099.95 -
PROX Engine Rebuild Kit 10.EK5806.C
PROX
$1,099.95A comprehensive engine rebuild kit is essential when you're restoring your engine to factory specifications or preparing it for high-performance duty. The PROX 10.EK5806.C delivers precision-engineered components that work together to ensure proper...09031689- SKU:
- 09031689
- Availability:
- Ships Same Business Day
- Weight:
- 25.56 LBS
- TYPE:
- ENGINE
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- UTV
- BORE SIZE METRIC:
- +0.02 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$1,099.95 -
PROX Engine Rebuild Kit 10.EK5805.B1
PROX
$1,099.95An engine rebuild demands precision components that restore performance to factory specifications—or better. The PROX Engine Rebuild Kit 10.EK5805.B1 provides OEM-quality internal parts engineered to handle the demands of both street and track...09031697- SKU:
- 09031697
- Availability:
- Ships Same Business Day
- Weight:
- 24.41 LBS
- BORE SIZE METRIC:
- +0.01 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- UNITS:
- KIT
- RIDING STYLE:
- UTV
$1,099.95 -
PROX Engine Rebuild Kit 10.EK5805.C1
PROX
$1,099.95A complete engine rebuild demands precision components that restore your engine to factory specifications or beyond. The PROX Engine Rebuild Kit 10.EK5805.C1 delivers OEM-quality pistons, rings, gaskets, and bearings in one comprehensive package,...09031698- SKU:
- 09031698
- Availability:
- Ships Same Business Day
- Weight:
- 25.86 LBS
- PRODUCT NAME:
- REBUILD KIT
- BORE SIZE METRIC:
- +0.02 MM
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- UTV
$1,099.95 -
Wiseco Engine Rebuild Kit 85mm 2005-2008 Honda TRX400EX Sportrax PWR131B-850
WISECO
$809.95When your Honda TRX400EX's engine starts showing signs of wear, a complete rebuild is your best path to restoring peak performance and reliability. The Wiseco PWR131B-850 kit eliminates the guesswork by bundling all critical internal components—pistons,...09031610- SKU:
- 09031610
- Availability:
- Ships Same Business Day
- Weight:
- 16.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- 85.00 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
$809.95Qty in Cart: 0Quantity:Price:$809.95Subtotal: -
Wiseco Engine Rebuild Kit Honda TRX400EX 2005-2008 PWR131B-880
WISECO
$797.88When your Honda TRX400EX reaches high mileage or shows signs of wear, a complete engine rebuild is the most cost-effective way to restore full performance and reliability. The Wiseco PWR131B-880 kit delivers everything needed for a comprehensive top and...09031611- SKU:
- 09031611
- Availability:
- Ships Same Business Day
- Weight:
- 16.40 LBS
- BORE - OVERSIZE METRIC:
- +3.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- BORE SIZE METRIC:
- 88.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- BORE - OVERSIZE:
- +3,00 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$797.88 -
Wiseco Engine Rebuild Kit Honda TRX400EX 1999-2004 PWR131A-860
WISECO
$819.95When your TRX400EX's engine shows signs of wear—loss of compression, increased blow-by, or metal fatigue—a full rebuild is the most cost-effective way to restore original performance and reliability. The Wiseco Engine Rebuild Kit PWR131A-860 delivers all...09031513- SKU:
- 09031513
- Availability:
- Ships Same Business Day
- Weight:
- 16.20 LBS
$819.95 -
Wiseco Engine Rebuild Kit Yamaha YFM350 Warrior 1987-2004 PWR137-835
WISECO
$754.95When your Yamaha YFM350 Warrior's engine shows wear, a piecemeal approach wastes time and money. The Wiseco Engine Rebuild Kit PWR137-835 delivers everything you need for a complete top and bottom-end overhaul, eliminating guesswork and ensuring your...09031522- SKU:
- 09031522
- Availability:
- Ships Same Business Day
- Weight:
- 15.10 LBS
$754.95 -
Wrench Rabbit Engine Rebuild Kit for Honda TRX 350 FE 2000-2006 WR00007
WRENCH RABBIT
$895.95When engine wear compromises your TRX 350's reliability, a complete rebuild restores factory performance and extends service life. The Wrench Rabbit WR00007 kit supplies all critical internal components—pistons, crankshaft, gaskets, and seals—eliminating...09031633- SKU:
- 09031633
- Availability:
- Ships Same Business Day
- Weight:
- 17.25 LBS
- RIDING STYLE:
- UTV
- TYPE:
- ENGINE
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
$895.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2017 Polaris RZR 900 WR00009
WRENCH RABBIT
$1,994.95When engine wear compromises performance and reliability, a complete rebuild kit addresses every critical component in one service. The Wrench Rabbit Engine Rebuild Kit for your 2017 Polaris RZR 900 restores compression, eliminates leaks, and rebuilds...09031635- SKU:
- 09031635
- Availability:
- Ships Same Business Day
- Weight:
- 25.00 LBS
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$1,994.95 -
Wrench Rabbit Engine Rebuild Kit for Polaris RZR 900 2018-2019 WR00010
WRENCH RABBIT
$1,994.95Engine wear and internal component degradation compromise both performance and reliability—a complete rebuild restores your Polaris RZR 900 to factory specifications and beyond. The Wrench Rabbit Engine Rebuild Kit supplies OEM-quality internal...09031636- SKU:
- 09031636
- Availability:
- Ships Same Business Day
- Weight:
- 25.00 LBS
- RIDING STYLE:
- UTV
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
$1,994.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2015 Polaris RZR 900 WR00042
WRENCH RABBIT
$1,994.95When your Polaris RZR 900 engine has logged serious hours, a complete rebuild is the only way to restore it to factory specifications and reclaim lost performance. The Wrench Rabbit WR00042 kit eliminates the guesswork by bundling every critical...09031646- SKU:
- 09031646
- Availability:
- Ships Same Business Day
- Weight:
- 27.90 LBS
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- UTV
$1,994.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Polaris ACE 900 XC 2018-2019 WR00043
WRENCH RABBIT
$1,994.95Engine wear and internal damage compound over time, reducing power output and reliability on the trail or track. The Wrench Rabbit Complete Engine Rebuild Kit for your Polaris ACE 900 XC delivers all critical internal components in one package,...09031647- SKU:
- 09031647
- Availability:
- Ships Same Business Day
- Weight:
- 27.70 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- UTV
- UNITS:
- KIT
$1,994.95
