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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WSM Piston Kit - 83.00 mm - Polaris 50-306PK
WSM
$95.36Stock pistons wear out faster than you'd expect, especially under racing conditions or aggressive riding. The WSM Piston Kit delivers OEM-equivalent quality with engineering upgrades that reduce...09101323- SKU:
- 09101323
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
$95.36 -
WSM Top End Kit - 78.50 mm - Honda 54-226-10
WSM
$155.89A top-end rebuild is essential for restoring compression, eliminating blow-by, and reclaiming lost horsepower in your 4-stroke Honda engine. This complete WSM kit eliminates multiple supplier...09031341- SKU:
- 09031341
- Availability:
- Ships Same Business Day
- Weight:
- 1.50 LBS
$155.89 -
WSM Top-End Rebuild Kit - 83.50 mm - Platinum Series - Polaris 54-306-12P
WSM
$150.19A top-end rebuild is critical maintenance for any high-performance engine—worn pistons and rings directly compromise compression, power output, and reliability. The WSM Platinum Series kit delivers...09030757- SKU:
- 09030757
- Availability:
- Ships Same Business Day
- Weight:
- 1.71 LBS
$150.19Qty in Cart: 0Quantity:Price:$150.19Subtotal: -
Hiflofiltro Oil Filter for 1986-1987 Honda ATC125 M HF118
HIFLOFILTRO
$4.84Regular oil filter changes are essential to engine longevity—contaminants and debris accumulate quickly, reducing oil quality and increasing wear on internal components. The HF118 is engineered to...07120527- SKU:
- 07120527
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
$4.84 -
MOOSE OFFROAD Cylinder - 85.00 mm - Kawasaki MSECW30013
MOOSE OFFROAD
$385.95A worn or damaged cylinder directly compromises engine compression, power delivery, and reliability—especially critical for off-road applications where durability is non-negotiable. This MOOSE...09311075- SKU:
- 09311075
- Availability:
- Ships Same Business Day
- Weight:
- 2.80 LBS
$385.95 -
MOOSE OFFROAD Cylinder - 85.00 mm - Kawasaki MSECW30014
MOOSE OFFROAD
$385.95A worn or damaged cylinder directly compromises combustion efficiency, power delivery, and engine longevity. This MOOSE OFFROAD replacement restores your Kawasaki to factory specifications with...09311076- SKU:
- 09311076
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
$385.95 -
MOOSE OFFROAD Cylinder - 92.00 mm - Kawasaki MSECW30015
MOOSE OFFROAD
$525.95A worn or damaged cylinder compromises compression, power delivery, and fuel efficiency—directly impacting your machine's performance and reliability. The MOOSE OFFROAD 92mm cylinder restores your...09311077- SKU:
- 09311077
- Availability:
- Ships Same Business Day
- Weight:
- 4.10 LBS
$525.95 -
MOOSE OFFROAD One-Way Starter Bearing - Suzuki 11-936
MOOSE OFFROAD
$104.95A worn or failing starter bearing compromises your engine's starting reliability and can lead to costly damage to your starter motor. The MOOSE OFFROAD One-Way Starter Bearing restores OEM-level...09240647- SKU:
- 09240647
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
$104.95 -
MOOSE OFFROAD One-Way Starter Bearing - Honda 11-937
MOOSE OFFROAD
$98.95A worn or damaged starter bearing can leave you stranded—and replacing it with a precision-engineered OEM-style component ensures reliable cold starts and consistent performance lap after lap. The...09240648- SKU:
- 09240648
- Availability:
- Ships Same Business Day
- Weight:
- 0.28 LBS
$98.95 -
MOOSE OFFROAD Complete Motor Gasket Kit - Arctic Cat/Suzuki 808839MSE
MOOSE OFFROAD
$131.94A complete engine and transmission rebuild demands precision gaskets and seals that won't compromise your work. This Moose Offroad kit eliminates the hassle of sourcing individual components from the...09347203- SKU:
- 09347203
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
$131.94 -
MOOSE OFFROAD Complete Motor Gasket Kit - Honda 808900MSE
MOOSE OFFROAD
$83.24Engine rebuilds demand precision sealing—any compromise risks catastrophic failure. This complete motor gasket kit eliminates the guesswork by bundling every critical seal and gasket your Honda needs...09347205- SKU:
- 09347205
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
$83.24 -
MOOSE OFFROAD Complete Motor Gasket Kit - Polaris 808992MSE
MOOSE OFFROAD
$131.46When you're rebuilding a Polaris engine or transmission, OEM gasket kits command premium prices without delivering premium results. This MOOSE OFFROAD Complete Motor Gasket Kit gives you...09347209- SKU:
- 09347209
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
$131.46 -
MOOSE OFFROAD Top End Gasket Kit - Yamaha 810974MSE
MOOSE OFFROAD
$122.91A top-end rebuild requires precision gaskets and seals that won't fail under load—this kit delivers OEM-quality components in one complete package. Whether you're doing routine maintenance or a full...09347211- SKU:
- 09347211
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$122.91 -
MOOSE OFFROAD Top End Gasket Kit - Polaris 810992MSE
MOOSE OFFROAD
$78.91A top-end rebuild demands precision sealing—any leak or degradation compromises compression, efficiency, and reliability. This MOOSE OFFROAD gasket kit delivers the complete seal solution for Polaris...09347213- SKU:
- 09347213
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
$78.91 -
MOOSE OFFROAD Top End Gasket Kit - Honda 810999MSE
MOOSE OFFROAD
$106.77A top-end rebuild demands precision—gasket failure leads to compression loss, oil seepage, and catastrophic engine damage. This MOOSE OFFROAD kit consolidates every gasket, seal, and O-ring you need...09347215- SKU:
- 09347215
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
$106.77 -
MOOSE OFFROAD Oil Seal Set - Polaris 822198MSE
MOOSE OFFROAD
$47.16A complete engine and transmission rebuild demands precision sealing—any leak compromises performance and longevity. This MOOSE OFFROAD Oil Seal Set eliminates the guesswork by bundling every gasket...09351200- SKU:
- 09351200
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$47.16 -
MOOSE OFFROAD Oil Seal Set - Honda 822990MSE
MOOSE OFFROAD
$41.00An engine rebuild demands precision sealing at every junction—even one compromised gasket or oil seal can lead to leaks, contamination, and catastrophic failure. The MOOSE OFFROAD Oil Seal Set...09351202- SKU:
- 09351202
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
$41.00 -
On Sale
KIBBLEWHITE Top End Service Kit 60-61900
KIBBLEWHITE
MSRP: $707.70Now: $636.93Was: $707.70A top-end rebuild demands precision components that can withstand extreme combustion pressures and sustained high RPMs. The KIBBLEWHITE 60-61900 kit eliminates the guesswork by bundling OEM-quality...09263398- SKU:
- 09263398
- Availability:
- Ships Same Business Day
- Weight:
- 2.10 LBS
MSRP: $707.70Now: $636.93Was: $707.70 -
On Sale
KIBBLEWHITE Top End Service Kit 80-82700
KIBBLEWHITE
MSRP: $787.91Now: $662.72Was: $787.91A top-end rebuild is the foundation of reliable, high-output engine performance—and doing it right means using quality components engineered for precision and durability. The KIBBLEWHITE 80-82700 kit...09263399- SKU:
- 09263399
- Availability:
- Ships Same Business Day
- Weight:
- 1.80 LBS
MSRP: $787.91Now: $662.72Was: $787.91 -
On Sale
KIBBLEWHITE Top End Service Kit 80-82750
KIBBLEWHITE
MSRP: $736.36Now: $662.72Was: $736.36A top-end rebuild demands precision components that can handle sustained high RPM operation without compromise. The KIBBLEWHITE 80-82750 kit consolidates every critical component—pistons, valves,...09263400- SKU:
- 09263400
- Availability:
- Ships Same Business Day
- Weight:
- 1.76 LBS
MSRP: $736.36Now: $662.72Was: $736.36
