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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T.M. DESIGNWORKS Case Saver/Sprocket Cover - Red - Honda HCC-TRX-RD
T.M. DESIGNWORKS
$64.95Chain derailment during aggressive riding can cause catastrophic engine case damage that sidelines your machine and empties your wallet. The T.M. DESIGNWORKS Case Saver/Sprocket Cover provides...09501018- SKU:
- 09501018
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$64.95 -
T.M. DESIGNWORKS Case Saver/Sprocket Cover - Black - Yamaha YCC-702-BK
T.M. DESIGNWORKS
$64.95Chain derailment can mean catastrophic engine case damage and expensive repairs—or worse, a DNF on race day. The T.M. DESIGNWORKS Case Saver/Sprocket Cover shields your engine case from impact while...09501019- SKU:
- 09501019
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$64.95 -
T.M. DESIGNWORKS Case Saver/Sprocket Cover - Blue - Yamaha YCC-702-BU
T.M. DESIGNWORKS
$64.95Chain derailments can cause catastrophic engine case damage that sidelines your bike and empties your wallet. The T.M. DESIGNWORKS Case Saver shields your engine case from impact while its integrated...09501020- SKU:
- 09501020
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
T.M. DESIGNWORKS Case Saver/Sprocket Cover - Black - Yamaha YCC-YFZ-BK
T.M. DESIGNWORKS
$64.95Engine case damage can sideline your Yamaha mid-season, and a single chain derailment can turn a good ride into a costly repair. The T.M. DESIGNWORKS Case Saver delivers FIM-approved protection that...09501021- SKU:
- 09501021
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$64.95 -
T.M. DESIGNWORKS Oil Injection Block Off Kit - Yamaha BBOK-01
T.M. DESIGNWORKS
$44.95If you're running a high-revving Yamaha two-stroke and want to simplify your fuel system while reducing complexity, the T.M. DESIGNWORKS Oil Injection Block Off Kit eliminates the factory oil...09320301- SKU:
- 09320301
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
$44.95 -
MOOSE UTILITY Clutch Cover - Inner - Polaris 100-3343-PU
MOOSE UTILITY
$172.95Factory clutch covers endure constant thermal cycling and mechanical stress, making them vulnerable to cracking or warping over time. A worn or damaged inner clutch cover compromises your machine's...09402116- SKU:
- 09402116
- Availability:
- Ships Same Business Day
- Weight:
- 4.05 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Polaris 100-3440-PU
MOOSE UTILITY
$172.95A worn or damaged clutch cover compromises both engine protection and aesthetic appeal. The MOOSE UTILITY Clutch Cover delivers OEM-quality replacement performance without the dealership markup,...09402117- SKU:
- 09402117
- Availability:
- Ships Same Business Day
- Weight:
- 3.27 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Polaris 100-3536-PU
MOOSE UTILITY
$172.95A worn or damaged clutch cover compromises both performance and engine protection on your Polaris. This OEM-quality replacement restores proper clutch housing integrity and thermal management,...09402118- SKU:
- 09402118
- Availability:
- Ships Same Business Day
- Weight:
- 3.70 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Polaris 100-3305-PU
MOOSE UTILITY
$172.95A worn or damaged clutch cover compromises your Polaris's heat management and drivetrain reliability. This OEM-spec replacement restores proper clutch function and thermal performance, ensuring...09402119- SKU:
- 09402119
- Availability:
- Ships Same Business Day
- Weight:
- 3.55 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Polaris 100-3537-PU
MOOSE UTILITY
$129.95A worn or damaged clutch cover compromises the integrity of your entire clutch system, leading to decreased efficiency and potential internal damage. The MOOSE UTILITY Clutch Cover delivers...09402120- SKU:
- 09402120
- Availability:
- Ships Same Business Day
- Weight:
- 4.35 LBS
$129.95 -
MOOSE UTILITY Clutch Cover - Outer - Polaris 100-3538-PU
MOOSE UTILITY
$172.95A worn or damaged clutch cover compromises your Polaris's shifting reliability and exposes internal components to contamination and premature wear. This MOOSE UTILITY outer clutch cover restores...09402121- SKU:
- 09402121
- Availability:
- Ships Same Business Day
- Weight:
- 4.05 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Inner - Can-Am 500-1040-PU
MOOSE UTILITY
$172.95Your Can-Am's clutch system demands components that can handle demanding terrain and repeated thermal cycles without compromise. The MOOSE UTILITY inner clutch cover is engineered as a direct factory...09402122- SKU:
- 09402122
- Availability:
- Ships Same Business Day
- Weight:
- 5.36 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Can-Am 500-1041-PU
MOOSE UTILITY
$172.95A compromised clutch cover can lead to premature wear, contamination, and unpredictable clutch engagement—critical issues for Can-Am operators who demand reliability. This MOOSE UTILITY replacement...09402123- SKU:
- 09402123
- Availability:
- Ships Same Business Day
- Weight:
- 4.35 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Can-Am 500-1052-PU
MOOSE UTILITY
$129.95A worn or damaged clutch cover compromises both engine protection and aesthetic appeal—especially critical on high-performance machines where reliability is non-negotiable. The MOOSE UTILITY Clutch...09402125- SKU:
- 09402125
- Availability:
- Ships Same Business Day
- Weight:
- 3.65 LBS
$129.95 -
MOOSE UTILITY Clutch Cover - Inner - Can-Am 500-1079-PU
MOOSE UTILITY
$172.95A worn or damaged inner clutch cover compromises power transfer and accelerates component degradation—replacement is essential for maintaining consistent engagement and preventing costly secondary...09402128- SKU:
- 09402128
- Availability:
- Ships Same Business Day
- Weight:
- 2.85 LBS
$172.95 -
MOOSE UTILITY Clutch Cover - Outer - Can-Am 500-1080-PU
MOOSE UTILITY
$172.95Factory clutch covers endure constant thermal cycling and mechanical stress—over time, cracks and wear compromise both performance and reliability. The MOOSE UTILITY Clutch Cover restores OEM...09402129- SKU:
- 09402129
- Availability:
- Ships Same Business Day
- Weight:
- 4.45 LBS
$172.95Qty in Cart: 0Quantity:Price:$172.95Subtotal: -
RICK'S MOTORSPORT ELECTRIC Stator Cover Gasket - Polaris 25-500
RICK'S MOTORSPORT ELECTRIC
$29.95A compromised stator cover gasket leads to oil leaks, contamination, and potential electrical damage on your Polaris machine. This OEM-replacement gasket restores a reliable seal without...09347753- SKU:
- 09347753
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$29.95 -
MOOSE RACING Cylinder - 99.00 mm - Polaris MSE60005
MOOSE RACING
$278.95A worn or damaged cylinder compromises ring seal integrity, reduces compression, and increases blow-by—all of which tank your power output and engine reliability. The MOOSE RACING 99.00 mm cylinder...09311161- SKU:
- 09311161
- Availability:
- Ships Same Business Day
- Weight:
- 4.63 LBS
$278.95 -
On Sale
PROX Top End Gasket Set - Yamaha 35.2718
PROX
MSRP: $120.95Now: $98.00Was: $120.95A compromised top-end gasket set is one of the quickest ways to lose compression, leak oil, and watch your rebuild efforts go to waste. The PROX 35.2718 gasket set for Yamaha engines delivers...09347766- SKU:
- 09347766
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $120.95Now: $98.00Was: $120.95 -
On Sale
PROX Piston Kit - 92.94 mm - Yamaha Wolverine RMAX2/RMAX4 01.2921.A
PROX
MSRP: $177.95Now: $136.00Was: $177.95Engine rebuilds demand precision—and settling for inferior pistons compromises reliability and performance. The PROX Piston Kit delivers OEM-grade quality with CNC-machined accuracy, ensuring proper...09106785- SKU:
- 09106785
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
MSRP: $177.95Now: $136.00Was: $177.95
