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
-
On Sale
ATHENA Top End Gasket Kit - Polaris P400427620010
ATHENA
MSRP: $70.95Now: $64.00Was: $70.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression. Kits do not...09342173- SKU:
- 09342173
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MATERIAL:
- SILICONE
- TYPE:
- TOP END
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
MSRP: $70.95Now: $64.00Was: $70.95Qty in Cart: 0Quantity:Price:MSRP: $70.95Now: $64.00Was: $70.95Subtotal: -
On Sale
ATHENA Top End Gasket Kit - Polaris P400427620013
ATHENA
MSRP: $131.95Now: $119.00Was: $131.95Specifically designed for the pro, semi-pro and amateur rider who freshens up their engine prior to a race or during midseason. Gives the rider a choice of using standard gas with stock compression, or race gas with a higher compression. Kits do not...09342175- SKU:
- 09342175
- Availability:
- Ships Same Business Day
- Weight:
- 0.33 LBS
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
MSRP: $131.95Now: $119.00Was: $131.95 -
On Sale
ATHENA Gasket Kit - YFZ350 P400485160021
ATHENA
MSRP: $41.95Now: $38.00Was: $41.95Kits include aluminum cylinder with nickel-carbide coating designed with larger water jackets, Forged piston with molybdenum coating, Special gasket kit, Easy-to-follow step-by-step installation instructions, All are bolt-on; no machining required09342194- SKU:
- 09342194
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- BORE SIZE METRIC:
- 68.00 MM
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE:
- 68,00 MM
- PRODUCT NAME:
- GASKET KIT
MSRP: $41.95Now: $38.00Was: $41.95 -
Cylinder Works Big Bore Gasket Kit for Honda TRX450R 2004-2005 11003-G01
CYLINDER WORKS
$99.95If you're running a Honda TRX450R and want measurable gains in displacement and power without extensive machine work, this big bore kit delivers the displacement increase you need with minimal fabrication hassle. The Cylinder Works 11003-G01 pairs a...09341526- SKU:
- 09341526
- Availability:
- Ships Same Business Day
- Weight:
- 0.26 LBS
- BORE SIZE METRIC:
- OVERSIZED (+3.00 MM)
- TYPE:
- TOP END
- STYLE:
- BIG BORE
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- MATERIAL:
- NICKEL SILICON CARBIDE
$99.95 -
Cylinder Works Big Bore Gasket Kit 94mm Bore Arctic Cat 400 DVX 2004-2008 41001-G01
CYLINDER WORKS
$115.95When you're pushing your Arctic Cat 400 DVX to its limits, factory bore limitations hold you back. The Cylinder Works Big Bore Gasket Kit delivers a complete, ready-to-install solution that increases displacement without requiring machine work or...09341527- SKU:
- 09341527
- Availability:
- Ships Same Business Day
- Weight:
- 0.23 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE SIZE METRIC:
- OVERSIZE (+4.00 MM)
- PRODUCT NAME:
- GASKET KIT
- STYLE:
- BIG BORE
- MATERIAL:
- NICKEL SILICON CARBIDE
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
$115.95 -
On Sale
ATHENA Top End Gasket Kit - Honda P400210600305
ATHENA
MSRP: $101.95Now: $92.00Was: $101.95Keep your engine running at peak performance between races with the ATHENA Top End Gasket Kit. Whether you're running on pump gas with stock compression or pushing higher octane fuel with elevated boost, this kit gives you the flexibility to optimize...09344871- SKU:
- 09344871
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- MATERIAL:
- SILICONE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
MSRP: $101.95Now: $92.00Was: $101.95 -
HOT RODS Crank Seal - YFZ350 K018
HOT RODS
$26.95A leaking countershaft seal doesn't just waste oil—it compromises engine reliability and forces you off the track or out of the garage. The HOT RODS Crank Seal kit delivers a complete, bolt-on solution that eliminates guesswork and gets you back to peak...09350069- SKU:
- 09350069
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- UNITS:
- KIT
- APPLICATION:
- MAIN CRANKSHAFT
- PRODUCT NAME:
- SEAL KIT
- TYPE:
- OIL
- RIDING STYLE:
- ATV
$26.95 -
HOT RODS Counter Balancer Bearing Kit BBK0021
HOT RODS
$52.95A counter balancer bearing kit is essential when performing any new counter balancer installation, engine case rebuild, or shaft replacement on modern 4-stroke engines. Using OEM-quality bearings ensures proper shaft alignment, minimizes vibration, and...09500612- SKU:
- 09500612
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$52.95 -
HOT RODS Counter Balancer Bearing Kit - Honda BBK0005
HOT RODS
$21.95If you're rebuilding or installing a new counter balancer in your 4-stroke engine, bearing failure is a silent killer that leads to catastrophic damage. The HOT RODS Counter Balancer Bearing Kit ensures precise shaft support with trusted, OEM-quality...09500541- SKU:
- 09500541
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERBALANCE SHAFT
- PRODUCT NAME:
- BEARING KIT
$21.95 -
HOT RODS Counter Balancer Bearing Kit - Yamaha BBK0008
HOT RODS
$93.95When rebuilding or servicing your 4-stroke engine, installing quality bearings on the counter balancer shaft is non-negotiable—inadequate bearings lead to premature wear, vibration, and catastrophic failure. The HOT RODS Counter Balancer Bearing Kit...09500542- SKU:
- 09500542
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERBALANCE SHAFT
- PRODUCT NAME:
- BEARING KIT
- UNITS:
- KIT
$93.95 -
HOT RODS Counter Balancer Bearing Kit - Yamaha BBK0009
HOT RODS
$77.95A worn or damaged counter balancer bearing will quickly compromise engine balance and accelerate wear across your entire bottom end. This HOT RODS kit supplies OEM-quality bearings engineered to handle the lateral and rotational loads of modern 4-stroke...09500543- SKU:
- 09500543
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
$77.95 -
HOT RODS Counter Balancer Bearing Kit - Yamaha BBK0010
HOT RODS
$38.95A counter balancer bearing kit is essential when rebuilding or servicing your engine's counter balancer shaft, as worn or damaged bearings directly compromise engine balance and longevity. HOT RODS supplies OEM-quality bearings engineered to tight...09500544- SKU:
- 09500544
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
- RIDING STYLE:
- ATV
$38.95Qty in Cart: 0Quantity:Price:$38.95Subtotal: -
HOT RODS Counter Balancer Bearing Kit - Yamaha BBK0011
HOT RODS
$63.95A failing counter balancer bearing will quickly compromise engine reliability and performance. Whether you're rebuilding an engine from the ground up or replacing a worn bearing, the HOT RODS Counter Balancer Bearing Kit ensures you're installing...09500545- SKU:
- 09500545
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- RIDING STYLE:
- ATV
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
- PRODUCT NAME:
- BEARING KIT
$63.95 -
HOT RODS Counter Balancer Bearing Kit - Kawasaki BBK0016
HOT RODS
$30.95A counter balancer bearing failure can compromise engine balance and lead to costly damage downstream. This HOT RODS kit supplies OEM-quality bearings for counter balancer shaft installations and rebuilds, eliminating the risk of sourcing mismatched...09500547- SKU:
- 09500547
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- COUNTERBALANCE SHAFT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$30.95 -
HOT RODS Counter Balancer Bearing Kit - Kawasaki/Suzuki BBK0018
HOT RODS
$63.95A counter balancer bearing kit isn't optional—it's essential insurance for engine longevity. When you're rebuilding or servicing your counter balancer shaft, worn or compromised bearings will compromise engine balance and accelerate wear across your...09500549- SKU:
- 09500549
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- BEARING KIT
- TYPE:
- COUNTERBALANCE SHAFT
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$63.95 -
HOT RODS Counter Balancer Kit BBK0026
HOT RODS
$38.95Counter balancer shaft bearing failure is one of the most overlooked causes of premature engine wear and catastrophic internal damage. The HOT RODS Counter Balancer Kit BBK0026 replaces worn or damaged bearings with precision-engineered components,...09500870- SKU:
- 09500870
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- BEARING
- TYPE:
- COUNTERBALANCE SHAFT
$38.95 -
HOT RODS Water Pump Repair Kit - Kawasaki WPK0061
HOT RODS
$45.95A leaking water pump compromises engine cooling efficiency and can lead to catastrophic overheating if left unrepaired. This HOT RODS repair kit gives you OEM-equivalent components at a fraction of replacement cost, restoring your Kawasaki's cooling...09344046- SKU:
- 09344046
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ATV
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
$45.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0024
HOT RODS
$110.95A failing water pump doesn't just waste your time on the track—it risks catastrophic engine damage. This HOT RODS repair kit gives you OEM-quality components to restore your pump's sealing integrity and bearing performance without replacing the entire...09342935- SKU:
- 09342935
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
$110.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0026
HOT RODS
$50.95A leaking water pump compromises engine cooling efficiency and can lead to catastrophic overheating. This HOT RODS repair kit addresses the root causes—failed bearings and deteriorated seals—with OEM-quality precision components that restore your pump to...09342937- SKU:
- 09342937
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- UNITS:
- KIT
- TYPE:
- WATER PUMP REPAIR
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$50.95 -
HOT RODS Water Pump Repair Kit - Yamaha WPK0028
HOT RODS
$93.95A leaking water pump compromises cooling system integrity and risks catastrophic engine damage—this repair kit restores OEM-level performance without replacing the entire assembly. The HOT RODS WPK0028 delivers precision micro bearings and high-pressure...09342939- SKU:
- 09342939
- Availability:
- Ships Same Business Day
- Weight:
- 0.14 LBS
- TYPE:
- WATER PUMP REPAIR
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$93.95
