ATV/UTV Engine
ATV/UTV Engine Parts at JJ Motorsports
Maximize your ATV or UTV's engine life with top-quality components from JJ Motorsports. Our selection includes gasket kits, connecting rods, water pump rebuild kits, and timing plugs designed for reliable sealing, strength, and easy installation in demanding off-road conditions. Compatible with Polaris, Can-Am, Honda, and more, these parts ensure peak power, reduced wear, and efficient operation for trail riding or utility work.
Shop trusted brands like Moose Racing for rebuild kits and Winderosa for gaskets. Explore related categories such as ATV/UTV air and fuel for intake upgrades or ATV/UTV drivetrain for transmission enhancements.
Top ATV/UTV Engine Products
- MOOSE UTILITY Clutch Cover Gasket Seal 500-1265-PU – Durable seal for clutch cover protection.
- WINDEROSA Standard Bore Gasket Kit 810585 – Complete kit for engine sealing and rebuilds.
- WORKS CONNECTION Engine Timing Plug 24-590 – Precision plug for accurate timing adjustments.
- MOOSE RACING Connecting Rod MR5026 – High-strength rod for engine durability.
- MOOSE RACING Water Pump Rebuild Kit 821865 – Comprehensive kit for water pump maintenance.
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
-
Wrench Rabbit Engine Rebuild Kit Yamaha YFM660F Grizzly 4x4 2002-2008 WR101-212
WRENCH RABBIT
$1,249.95When engine wear compromises performance and reliability, a quality rebuild kit is your most cost-effective path to restoring full power and longevity. The Wrench Rabbit WR101-212 consolidates all critical internal components into one comprehensive...09031463- SKU:
- 09031463
- Availability:
- Ships Same Business Day
- Weight:
- 23.30 LBS
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- KIT CONTAINS +1 MM PISTON
- RIDING STYLE:
- ATV
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,249.95 -
Wrench Rabbit Engine Rebuild Kit Yamaha YFM660R Raptor 2001-2005 WR101-213
WRENCH RABBIT
$1,315.95When your Yamaha YFM660R Raptor's engine shows signs of wear, a complete rebuild restores reliability and performance without replacing the entire powerplant. The Wrench Rabbit WR101-213 kit eliminates the guesswork by bundling every critical...09031464- SKU:
- 09031464
- Availability:
- Ships Same Business Day
- Weight:
- 22.80 LBS
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- KIT CONTAINS +0.5 MM PISTON
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,315.95 -
Wrench Rabbit Engine Rebuild Kit for 2004-2005 Honda TRX450R WR101-031
WRENCH RABBIT
$1,249.95When your Honda TRX450R's engine shows signs of wear—whether from high-mileage riding or track abuse—a full rebuild is the most cost-effective path to restoring reliability and performance. The Wrench Rabbit Engine Rebuild Kit eliminates guesswork by...09030971- SKU:
- 09030971
- Availability:
- Ships Same Business Day
- Weight:
- 17.80 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- TYPE:
- ENGINE
$1,249.95 -
Wrench Rabbit Engine Rebuild Kit for 2006-2009 Honda TRX450R WR101-032
WRENCH RABBIT
$1,315.95A complete engine rebuild requires precision-matched components that work in harmony—and the Wrench Rabbit Engine Rebuild Kit delivers exactly that. This comprehensive kit eliminates the guesswork of sourcing individual parts by bundling everything you...09030972- SKU:
- 09030972
- Availability:
- Ships Same Business Day
- Weight:
- 17.40 LBS
- MODEL:
- WRENCH RABBIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,315.95 -
Wrench Rabbit Complete Engine Rebuild Kit for 2005-2010 Polaris Sportsman 800 4x4 WR101-057
WRENCH RABBIT
$1,711.95When your Polaris Sportsman 800 shows signs of wear—rough idle, loss of power, or bearing play—a complete engine rebuild is the most cost-effective path to restoration. The Wrench Rabbit Complete Engine Rebuild Kit (WR101-057) delivers all the critical...09030995- SKU:
- 09030995
- Availability:
- Ships Same Business Day
- Weight:
- 27.60 LBS
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 4-STROKE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- ATV
- MODEL:
- WRENCH RABBIT
- UNITS:
- KIT
- RIDING STYLE:
- UTV
- TYPE:
- ENGINE
$1,711.95 -
Wrench Rabbit Complete Engine Rebuild Kit for Suzuki LT-R450 QuadRacer 2006-2008 WR101-059
WRENCH RABBIT
$1,211.95When your Suzuki LT-R450 QuadRacer's engine reaches the end of its service life, a complete rebuild kit eliminates the guesswork of sourcing individual components and ensures every critical surface meets OEM specifications. This Wrench Rabbit kit bundles...09030997- SKU:
- 09030997
- Availability:
- Ships Same Business Day
- Weight:
- 16.90 LBS
- UNITS:
- KIT
- TYPE:
- ENGINE
- FEATURES:
- STANDARD COMPRESSION PISTON
- RIDING STYLE:
- ATV
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
$1,211.95 -
Wrench Rabbit Engine Rebuild Kit for 2004 Arctic Cat DVX 400 WR101-060
WRENCH RABBIT
$1,132.95When your 2004 Arctic Cat DVX 400's engine reaches the end of its service life, a quality rebuild kit saves you from sourcing individual components and risking compatibility issues. The Wrench Rabbit Engine Rebuild Kit delivers everything you need in one...09030998- SKU:
- 09030998
- Availability:
- Ships Same Business Day
- Weight:
- 16.35 LBS
- FEATURES:
- STANDARD COMPRESSION PISTON
- TYPE:
- ENGINE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- WRENCH RABBIT
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
$1,132.95 -
WSM Top-End Rebuild Kit - Standard 54-300-10P
WSM
$134.56A top-end rebuild demands precision components that restore your engine to factory specifications—or better. The WSM Standard 54-300-10P kit consolidates everything you need for a complete piston-to-gasket refresh, eliminating the hassle of sourcing...5430010- SKU:
- 5430010
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- PISTON MATERIAL:
- ALUMINUM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 72.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
$134.56 -
WSM Top-End Rebuild Kit - .50 mm 54-300-12P
WSM
$134.56A top-end rebuild addresses the heart of engine performance—when pistons, rings, and gaskets wear, you lose compression, power, and reliability. This WSM kit delivers all the precision components needed for a complete refresh, ensuring your engine runs...5430012- SKU:
- 5430012
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- PISTON MATERIAL:
- ALUMINUM
- PISTON SIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 72.50 MM
$134.56 -
WSM Top-End Rebuild Kit - 1 mm 54-300-14P
WSM
$134.56A properly rebuilt top-end is the foundation of reliable, consistent performance on the track or street. This WSM kit supplies everything needed for a complete piston assembly refresh—premium components engineered to OEM specifications with the precision...5430014- SKU:
- 5430014
- Availability:
- Ships Same Business Day
- Weight:
- 1.38 LBS
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 73.00 MM
- PISTON SIZE METRIC:
- +1.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$134.56 -
WSM Top-End Rebuild Kit - Standard 54-305-10P
WSM
$145.65A top-end rebuild is the foundation of reliable engine performance—and the WSM Standard 54-305-10P gives you OEM-quality components without compromise. This complete kit eliminates multiple purchasing trips and ensures all internal tolerances work in...5430510- SKU:
- 5430510
- Availability:
- Ships Same Business Day
- Weight:
- 1.56 LBS
- PISTON MATERIAL:
- ALUMINUM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 83.00 MM
- PISTON SIZE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- REBUILD KIT
- UNITS:
- EACH
$145.65 -
WSM Top-End Rebuild Kit - .50 mm 54-305-12P
WSM
$145.65A top-end rebuild demands precision components that restore engine performance to original specifications—or better. The WSM Top-End Rebuild Kit supplies everything needed for a complete piston assembly refresh, eliminating guesswork and ensuring proper...5430512- SKU:
- 5430512
- Availability:
- Ships Same Business Day
- Weight:
- 1.45 LBS
- BORE SIZE METRIC:
- 83.50 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON SIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
$145.65Qty in Cart: 0Quantity:Price:$145.65Subtotal: -
WSM Top-End Rebuild Kit - 1 mm 54-305-14P
WSM
$138.71A top-end rebuild demands precision components that can handle sustained high RPM loads without compromise. This WSM kit supplies everything needed for a complete piston assembly refresh—premium pistons, rings, pins, and clips engineered to exacting...5430514- SKU:
- 5430514
- Availability:
- Ships Same Business Day
- Weight:
- 1.63 LBS
- PISTON SIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 84.00 MM
$138.71Qty in Cart: 0Quantity:Price:$138.71Subtotal: -
WSM Top-End Rebuild Kit - Standard 54-520-10P
WSM
$248.50A worn top-end directly kills horsepower and throttle response—this kit restores combustion chamber integrity and sealing efficiency with precision-manufactured components. Whether you're diagnosing blow-by or prepping for serious track time, WSM's...5452010- SKU:
- 5452010
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- PISTON MATERIAL:
- ALUMINUM
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 64.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$248.50Qty in Cart: 0Quantity:Price:$248.50Subtotal: -
WSM Top-End Rebuild Kit - Standard 54-530-10P
WSM
$144.91A top-end rebuild is non-negotiable when you're chasing consistent power and reliability at the track or on the street. The WSM Standard 54-530-10P delivers OEM-quality components in one complete kit, eliminating the guesswork of sourcing individual...5453010- SKU:
- 5453010
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE SIZE METRIC:
- 66.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- ALUMINUM
- PISTON SIZE METRIC:
- STANDARD
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
$144.91Qty in Cart: 0Quantity:Price:$144.91Subtotal: -
WSM Ring Set 51-300-05
WSM
$30.39Piston ring sets are critical to engine performance, sealing combustion pressure while managing oil consumption and blow-by. The WSM Ring Set 51-300-05 delivers precise tolerances and durable construction to maintain compression and longevity in...5130005- SKU:
- 5130005
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE - OVERSIZE:
- +0,50 MM
- PISTON MATERIAL:
- ALUMINUM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- UNITS:
- SET
$30.39 -
WSM Ring Set 51-300-07
WSM
$28.37A quality ring set is foundational to engine reliability and performance—proper ring sealing directly impacts compression, oil consumption, and power delivery. The WSM Ring Set 51-300-07 delivers precision-engineered compression and oil control rings...5130007- SKU:
- 5130007
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- SET
- BORE - OVERSIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
$28.37Qty in Cart: 0Quantity:Price:$28.37Subtotal: -
WSM Ring Set 51-305
WSM
$30.36Piston ring sets are fundamental to engine performance—they seal combustion chambers, regulate oil consumption, and directly impact horsepower delivery and engine longevity. The WSM Ring Set 51-305 is engineered for precision fitment and consistent...51305- SKU:
- 51305
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$30.36Qty in Cart: 0Quantity:Price:$30.36Subtotal: -
WSM Ring Set 51-305-05
WSM
$30.36Proper ring sealing is non-negotiable for engine performance and longevity. The WSM Ring Set 51-305-05 delivers precise compression control and blow-by reduction, ensuring your engine maintains peak power output while protecting against premature wear...5130505- SKU:
- 5130505
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- +0,50 MM
- UNITS:
- SET
$30.36 -
WSM Ring Set 51-305-07
WSM
$30.36Piston ring wear is one of the most common causes of power loss and blow-by in high-performance engines. The WSM Ring Set 51-305-07 delivers OEM-equivalent compression and oil control, ensuring your engine maintains peak cylinder pressure and fuel...5130507- SKU:
- 5130507
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- SET
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- ATV
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
$30.36
