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!
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- Quantity
- Price
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HOT RODS Crankshaft - OEM Stoke - Polaris 4430-1
HOT RODS
$1,034.95If you're rebuilding a Polaris engine or replacing a worn crankshaft, the HOT RODS OEM Stoke Crankshaft delivers the reliability of factory specifications with the precision of a professional-grade component. This crankshaft is trued to exact OEM...09210608- SKU:
- 09210608
- Availability:
- Ships Same Business Day
- Weight:
- 18.95 LBS
$1,034.95 -
MOOSE OFFROAD Valve Seal Kit M60-60480
MOOSE OFFROAD
$15.95Valve seal degradation is a silent killer for engine performance—leaking oil past worn seals increases blowby, dilutes your oil, and forces your engine to work harder. The MOOSE OFFROAD Valve Seal Kit M60-60480 replaces your factory seals with...09262844- SKU:
- 09262844
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
$15.95 -
MOOSE OFFROAD Clutch Cover Gasket Seal - Can-Am 500-1219-PU
MOOSE OFFROAD
$24.95A failing clutch cover gasket seal is one of the most common sources of oil seepage in high-revving applications, leading to compromised lubrication and accelerated wear. The MOOSE OFFROAD Clutch Cover Gasket Seal matches or exceeds OE specifications,...09351193- SKU:
- 09351193
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
$24.95 -
MOOSE OFFROAD Motor Gasket Kit with Seal - Can-Am 811957MSE
MOOSE OFFROAD
$271.27Engine and transmission rebuilds demand precision components that fit right the first time. This Moose Offroad gasket and seal kit eliminates the hassle of sourcing individual parts across multiple suppliers, while delivering OEM-quality reliability at a...09344834- SKU:
- 09344834
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
$271.27Qty in Cart: 0Quantity:Price:$271.27Subtotal: -
MOOSE OFFROAD Cylinder - 93.00 mm - Polaris MSECW60008
MOOSE OFFROAD
$563.95A worn or damaged cylinder directly compromises compression, power delivery, and engine reliability—especially critical in demanding offroad conditions. This MOOSE OFFROAD cylinder restores your Polaris to OEM performance specifications with precision...09310966- SKU:
- 09310966
- Availability:
- Ships Same Business Day
- Weight:
- 7.40 LBS
$563.95 -
MOOSE OFFROAD Complete Motor Gasket Kit - Yamaha 808923MSE
MOOSE OFFROAD
$178.79A complete engine rebuild demands precision gaskets and seals that won't fail under load—and sourcing OEM parts individually drains both time and budget. The MOOSE OFFROAD Complete Motor Gasket Kit eliminates guesswork by bundling every gasket and o-ring...09341702- SKU:
- 09341702
- Availability:
- Ships Same Business Day
- Weight:
- 0.66 LBS
$178.79 -
Pro Filter Replacement Oil Filter for Kawasaki KAF400 Mule 610 4x4 2016 PF-128
PRO FILTER
$12.99Your Kawasaki KAF400 Mule 610 4x4 demands reliable engine protection, especially during demanding work or trail conditions. This OEM-type replacement filter uses advanced micro-pore filtration to capture contaminants more effectively than standard...07120567- SKU:
- 07120567
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
$12.99 -
On Sale
PROX Top End Gasket Set - Honda 35.1386
PROX
MSRP: $41.95Now: $34.00Was: $41.95A top-end rebuild demands gasket integrity—compromised seals mean oil leaks, compression loss, and potential engine damage. The PROX 35.1386 gasket set delivers precision-engineered components manufactured from first-class materials, ensuring reliable...09347109- SKU:
- 09347109
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $41.95Now: $34.00Was: $41.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1498
PROX
MSRP: $67.95Now: $55.00Was: $67.95A top-end rebuild demands precision sealing—any leak compromises compression, efficiency, and engine longevity. The PROX 35.1498 gasket set delivers OEM-equivalent fitment and material quality, eliminating the guesswork of sourcing individual gaskets and...09347115- SKU:
- 09347115
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
MSRP: $67.95Now: $55.00Was: $67.95 -
On Sale
PROX Top End Gasket Set - Honda 35.1499
PROX
MSRP: $41.95Now: $34.00Was: $41.95A top-end rebuild demands precision—and contaminated or degraded gaskets will undermine even the most meticulous machine work. The PROX Top End Gasket Set delivers OEM-quality sealing across all critical interfaces, eliminating compression leaks and...09347116- SKU:
- 09347116
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
MSRP: $41.95Now: $34.00Was: $41.95 -
RICK'S MOTORSPORT ELECTRIC Stator Gasket - Yamaha 25-404
RICK'S MOTORSPORT ELECTRIC
$14.95A compromised stator cover gasket is one of the easiest ways to lose an engine to oil seepage and corrosion. RICK'S MOTORSPORT ELECTRIC's OEM-replacement stator gasket seals the critical junction between your stator cover and engine case, preventing...09342610- SKU:
- 09342610
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
$14.95 -
VERTEX Piston Kit - 84.95 mm - Kawasaki 23908A
VERTEX
$230.95The VERTEX Piston Kit delivers OEM-level reliability with factory-engineered performance, engineered specifically for Kawasaki applications where precision and durability directly impact engine longevity. The forged construction and specialized surface...09103381- SKU:
- 09103381
- Availability:
- Ships Same Business Day
- Weight:
- 0.89 LBS
$230.95 -
VERTEX Piston Kit - 85.97 mm - Honda 23162100
VERTEX
$208.95When your engine's original pistons show wear, combustion efficiency drops and reliability becomes questionable. The VERTEX Piston Kit delivers OE-equivalent performance with factory-proven durability, ensuring your Honda engine maintains proper...09101067- SKU:
- 09101067
- Availability:
- Ships Same Business Day
- Weight:
- 1.01 LBS
$208.95 -
On Sale
VESRAH Complete Gasket Set - Suzuki LT 80 QuadSport VG-3048
VESRAH
MSRP: $53.95Now: $38.00Was: $53.95A complete engine rebuild demands precision gaskets that seal consistently under pressure and temperature cycling—VESRAH's complete gasket set for the Suzuki LT 80 QuadSport eliminates the risk of chasing leaks by providing every gasket, o-ring, and...VG3048- SKU:
- VG3048
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
MSRP: $53.95Now: $38.00Was: $53.95 -
On Sale
Wiseco Piston Kit 89.00mm 11:1 Compression for Honda TRX400EX 1999-2008 4667M08900
WISECO
MSRP: $266.95Now: $212.00Was: $266.95When you're running a Honda TRX400EX, stock pistons limit your engine's potential—especially if you're pushing higher RPMs or looking to extract reliable power across the board. This Wiseco piston kit delivers the precision-engineered internals you need...4667M08900- SKU:
- 4667M08900
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
MSRP: $266.95Now: $212.00Was: $266.95Qty in Cart: 0Quantity:Price:MSRP: $266.95Now: $212.00Was: $266.95Subtotal: -
On Sale
Wiseco Piston Kit 68mm for 1985-1986 Suzuki LT250R 571M06800
WISECO
MSRP: $189.95Now: $161.00Was: $189.95If you're running a Suzuki LT250R competitively, your OEM pistons are holding back peak performance. The Wiseco 571M06800 piston kit delivers higher compression ratios and measurable horsepower gains through precision forging and E-Coated...571M06800- SKU:
- 571M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
MSRP: $189.95Now: $161.00Was: $189.95 -
On Sale
Wiseco DDR DRX70 2014-2019 Piston Kit 893M04760
WISECO
MSRP: $113.89Now: $102.00Was: $113.89A piston kit is fundamental to any engine rebuild or performance upgrade—it directly impacts compression, durability, and power output. The Wiseco DDR DRX70 combines aerospace-grade forged aluminum with dyno-tested geometry to deliver the reliability and...09105610- SKU:
- 09105610
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
MSRP: $113.89Now: $102.00Was: $113.89 -
On Sale
Wiseco Engine Rebuild Kit 80mm for 2008-2010 Polaris RZR 800 PWR223-800A
WISECO
MSRP: $1,399.95Now: $1,181.00Was: $1,399.95When your Polaris RZR 800 engine reaches the end of its service life, a complete rebuild with quality components is the most cost-effective path to restoring full performance and reliability. This Wiseco kit delivers OEM-equivalent engineering across...09031685- SKU:
- 09031685
- Availability:
- Ships Same Business Day
- Weight:
- 25.80 LBS
MSRP: $1,399.95Now: $1,181.00Was: $1,399.95 -
On Sale
Wiseco Piston Kit 76.50 mm Kawasaki KLF300B Bayou 2X4 1986-2003 4671M07650
WISECO
MSRP: $194.95Now: $166.00Was: $194.95Factory pistons wear out, and when they do, your engine's performance suffers—lose compression, gain blow-by, and watch reliability nosedive. The Wiseco 76.50 mm forged piston kit restores your Kawasaki KLF300B to proper running condition with...4671M07650- SKU:
- 4671M07650
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
MSRP: $194.95Now: $166.00Was: $194.95Qty in Cart: 0Quantity:Price:MSRP: $194.95Now: $166.00Was: $194.95Subtotal: -
WORKS CONNECTION Engine Timing Plug - Red - Yamaha 24-595
WORKS CONNECTION
$49.95Engine timing plugs are a simple upgrade that delivers immediate visual impact while protecting your engine's timing cover from dirt and debris. These WORKS CONNECTION plugs replace your stock covers with precision-machined aluminum pieces that won't...09500262- SKU:
- 09500262
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal:
