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
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PROX Water Pump Rebuild Kit 57.7528
PROX
$31.95A failing water pump compromises cooling system integrity and risks catastrophic engine damage—this rebuild kit delivers OEM-equivalent performance at a fraction of replacement cost. PROX's...09347089- SKU:
- 09347089
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$31.95 -
PROX Water Pump Rebuild Kit 57.7625
PROX
$104.95A failing water pump can sideline your engine and compromise cooling system integrity, leading to catastrophic overheating during critical race conditions or extended driving sessions. This PROX...09347091- SKU:
- 09347091
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- TYPE:
- WATER PUMP
- RIDING STYLE:
- ATV
$104.95Qty in Cart: 0Quantity:Price:$104.95Subtotal: -
PROX Water Pump Rebuild Kit 57.7724
PROX
$105.95A failing water pump compromises your engine's cooling system and puts your build at risk during critical races or demanding track sessions. The PROX Water Pump Rebuild Kit 57.7724 gives you...09347092- SKU:
- 09347092
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- ATV
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$105.95Qty in Cart: 0Quantity:Price:$105.95Subtotal: -
PROX Water Pump Rebuild Kit 57.7821
PROX
$79.95A failing water pump compromises cooling system efficiency and risks catastrophic engine damage—especially under sustained track conditions or high-performance driving. The PROX Water Pump Rebuild...09347093- SKU:
- 09347093
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
- RIDING STYLE:
- ATV
$79.95Qty in Cart: 0Quantity:Price:$79.95Subtotal: -
PROX Water Pump Rebuild Kit 57.7824
PROX
$144.95Your water pump is the circulatory system of your engine—when it fails, catastrophic overheating follows. The PROX Water Pump Rebuild Kit 57.7824 gives you OEM-quality replacement components at a...09347094- SKU:
- 09347094
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- WATER PUMP
- UNITS:
- KIT
- PRODUCT NAME:
- REPAIR KIT
$144.95 -
PROX Gasket Kit - Complete 34.1494
PROX
$193.95A complete gasket kit is essential for any engine rebuild or major service—it ensures proper sealing across all critical interfaces and prevents costly oil leaks, coolant weeps, and combustion gas...09347096- SKU:
- 09347096
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
$193.95 -
PROX Gasket Kit - Complete 34.1496
PROX
$262.95A complete gasket kit is the foundation of a reliable engine assembly—worn or mismatched gaskets lead to fluid leaks, combustion blow-by, and catastrophic engine failure. The PROX Gasket Kit 34.1496...09347097- SKU:
- 09347097
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- ENGINE TYPE:
- 4-STROKE
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$262.95 -
PROX Gasket Kit - Complete 34.2021
PROX
$105.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures a perfect seal across all critical junctures and prevents oil leaks, coolant weeping, and combustion blow-by...09347098- SKU:
- 09347098
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
$105.95 -
PROX Gasket Kit - Complete 34.2280
PROX
$78.95A complete gasket kit is essential for any engine rebuild or major service to ensure proper sealing across all critical surfaces. PROX's complete gasket set eliminates the guesswork of sourcing...09347099- SKU:
- 09347099
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
$78.95Qty in Cart: 0Quantity:Price:$78.95Subtotal: -
PROX Gasket Kit - Complete - Yamaha 34.2434
PROX
$147.95A complete gasket kit is essential for any engine rebuild or top-end service—it ensures a reliable seal across all critical engine interfaces and eliminates the risk of oil or coolant leaks that can...09347100- SKU:
- 09347100
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$147.95Qty in Cart: 0Quantity:Price:$147.95Subtotal: -
PROX Gasket Kit - Complete - Yamaha 34.2439
PROX
$172.95A complete gasket kit is essential for any engine rebuild or top-end overhaul—it ensures proper sealing across all critical surfaces and prevents oil leaks, coolant seepage, and combustion gas escape...09347101- SKU:
- 09347101
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
- UNITS:
- KIT
$172.95Qty in Cart: 0Quantity:Price:$172.95Subtotal: -
PROX Gasket Kit - Complete - Kawasaki 34.3423
PROX
$172.95A complete gasket kit is essential for any engine rebuild or major service—it ensures a proper seal across all critical engine surfaces and prevents oil leaks that compromise performance and...09347103- SKU:
- 09347103
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- COMPLETE
$172.95 -
PROX Gasket Kit - Complete 34.3426
PROX
$214.95A complete gasket kit is essential for any engine rebuild or overhaul—it ensures a proper seal across all critical engine surfaces, preventing oil leaks, coolant seepage, and combustion blowby that...09347104- SKU:
- 09347104
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- RIDING STYLE:
- ATV
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- COMPLETE
- UNITS:
- KIT
$214.95 -
PROX Top End Gasket Set - Honda 35.1494
PROX
$88.95A proper top-end gasket set is non-negotiable for maintaining compression integrity and preventing oil weeping between cylinder head and block surfaces. PROX's Honda-specific 35.1494 set delivers...09347113- SKU:
- 09347113
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
$88.95 -
PROX Top End Gasket Kit - TRX450ER 35.1496
PROX
$109.95A failing top end gasket kit compromises combustion seal integrity, leading to power loss, oil seepage, and accelerated wear on critical engine components. The PROX Top End Gasket Kit for your...09347114- SKU:
- 09347114
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$109.95 -
PROX Top End Gasket Set - Yamaha 35.2280
PROX
$41.95A worn or failing top-end gasket set is one of the fastest ways to lose compression, invite oil seepage, and compromise engine reliability—especially in high-performance or race-prepped builds. The...09347125- SKU:
- 09347125
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET SET
- UNITS:
- SET
$41.95 -
PROX Top End Gasket Set - Yamaha 35.2358
PROX
$62.95A quality top-end gasket set is critical for maintaining compression and preventing oil seepage that can compromise engine performance and reliability. PROX gasket sets are precision-engineered to...09347126- SKU:
- 09347126
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- GASKET SET
- TYPE:
- TOP END
$62.95Qty in Cart: 0Quantity:Price:$62.95Subtotal: -
PROX Top End Gasket Set - Kawasaki/Suzuki 35.3423
PROX
$57.95A quality top end gasket set is non-negotiable when you're rebuilding or refreshing your engine—it's your first line of defense against combustion leaks that rob you of power and reliability. PROX's...09347137- SKU:
- 09347137
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- SET
$57.95 -
PROX Top End Gasket Set - Kawasaki 35.4705
PROX
$114.95A properly sealed top end is fundamental to engine reliability and performance—any combustion leak compromises both horsepower and longevity. The PROX Top End Gasket Set delivers OEM-equivalent...09347141- SKU:
- 09347141
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- RIDING STYLE:
- UTV
- UNITS:
- SET
$114.95 -
PROX Top End Gasket Set - Polaris 35.5494
PROX
$29.95A leaking or failing top end gasket set compromises engine sealing, leading to coolant loss, oil seepage, and potential overheating—all threats to engine longevity and reliability. The PROX 35.5494...09347142- SKU:
- 09347142
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET SET
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- SET
$29.95Qty in Cart: 0Quantity:Price:$29.95Subtotal:
