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
-
MOOSE RACING Motor Gasket Kit with Seal - LT250R 811822
MOOSE RACING
$93.98A complete engine and transmission rebuild demands precision-fit gaskets and seals—compromise here, and you're inviting oil leaks, contamination, and premature failure. The MOOSE RACING Motor Gasket...M811822- SKU:
- M811822
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
$93.98 -
MOOSE RACING Motor Gasket Kit with Seal - LT500R 811823
MOOSE RACING
$74.56An engine or transmission rebuild demands precision-fit gaskets and seals that won't compromise your work or your budget. MOOSE Racing delivers OEM-equivalent quality at a fraction of the cost, with...M811823- SKU:
- M811823
- Availability:
- Ships Same Business Day
- Weight:
- 0.32 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- COMPLETE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
$74.56Qty in Cart: 0Quantity:Price:$74.56Subtotal: -
MOOSE RACING Motor Gasket Kit with Seal 811828
MOOSE RACING
$109.72A complete engine and transmission rebuild demands precision components that won't compromise reliability or drain your budget. MOOSE RACING's Motor Gasket Kit eliminates the guesswork of sourcing...M811828- SKU:
- M811828
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
- TYPE:
- ENGINE
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
$109.72Qty in Cart: 0Quantity:Price:$109.72Subtotal: -
MOOSE RACING Exhaust Gasket Kit - Polaris 823180
MOOSE RACING
$28.67A degraded exhaust gasket compromises seal integrity, leading to performance loss, increased emissions, and potential engine damage. The MOOSE RACING Exhaust Gasket Kit delivers OEM-equivalent...09346035- SKU:
- 09346035
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- EXHAUST
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$28.67 -
MOOSE RACING Exhaust Gasket Kit - Polaris 823188
MOOSE RACING
$35.51A quality exhaust gasket kit is essential for maintaining a reliable seal between your exhaust manifold and cylinder head—preventing costly exhaust leaks that rob power and compromise engine...09346036- SKU:
- 09346036
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- TYPE:
- EXHAUST
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$35.51 -
MOOSE RACING Complete Motor Gasket Kit - YSF200 808811
MOOSE RACING
$46.81A complete engine and transmission rebuild demands precision-fit gaskets and seals that won't compromise your work. This Moose Racing kit delivers OEM-quality components at a fraction of dealer...M808811- SKU:
- M808811
- Availability:
- Ships Same Business Day
- Weight:
- 0.18 LBS
- RIDING STYLE:
- ATV
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
- UNITS:
- KIT
- TYPE:
- ENGINE
$46.81 -
MOOSE RACING Complete Motor Gasket Kit - YFZ350 808812
MOOSE RACING
$65.49A complete engine and transmission rebuild requires precision gasket sealing—any leak or premature failure can compromise your entire project. The MOOSE RACING Complete Motor Gasket Kit delivers...M808812- SKU:
- M808812
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- TYPE:
- COMPLETE
- PRODUCT NAME:
- GASKET
$65.49 -
MOOSE RACING Complete Motor Gasket Kit - YFM350 808813
MOOSE RACING
$94.63A complete engine and transmission rebuild demands gasket and seal integrity that won't compromise your performance or reliability. The MOOSE RACING Complete Motor Gasket Kit eliminates the guesswork...M808813- SKU:
- M808813
- Availability:
- Ships Same Business Day
- Weight:
- 0.24 LBS
- TYPE:
- ENGINE
- TYPE:
- COMPLETE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- GASKET
$94.63 -
LA Sleeve Cylinder Sleeve 82mm Bore Arctic Cat 400 2002-2017 Suzuki Eiger 400 2002-2007 Suzuki KingQuad 400 2008-2024 FL5512
LA SLEEVE
$111.95A worn cylinder sleeve compromises compression, power delivery, and fuel efficiency—ultimately shortening your engine's lifespan. The LA SLEEVE FL5512 restores your 400cc engine to factory...09310140- SKU:
- 09310140
- Availability:
- Ships Same Business Day
- Weight:
- 2.20 LBS
- CYLINDER BORE COATING:
- CHROME-MOLY ALLOY
- TYPE:
- AC
- BORE SIZE METRIC:
- 82.00 MM
- PRODUCT NAME:
- CYLINDER SLEEVE
- COLOR/FINISH:
- ALUMINUM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$111.95Qty in Cart: 0Quantity:Price:$111.95Subtotal: -
LA Sleeve Cylinder Rebuild Kit for Honda TRX400EX 1999-2008 LAS-5293K-1
LA SLEEVE
$340.95If your Honda TRX400EX is showing signs of wear—loss of compression, sluggish throttle response, or declining power output—a top-end rebuild is the most cost-effective path to restoring peak...09310358- SKU:
- 09310358
- Availability:
- Ships Same Business Day
- Weight:
- 3.81 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- CYLINDER
- UNITS:
- KIT
- MATERIAL:
- IRON
- RIDING STYLE:
- ATV
$340.95 -
On Sale
KIBBLEWHITE Intake Valve - Raptor 700 - Standard 80-80430
KIBBLEWHITE
MSRP: $37.55Now: $33.80Was: $37.55Your Raptor 700's intake valve is under constant thermal and mechanical stress—factory components can't match the durability demands of aggressive riding or racing. The KIBBLEWHITE Black Diamond™...09260253- SKU:
- 09260253
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- INTAKE
- HEAD DIAMETER METRIC:
- 38.00 MM
- LENGTH IMPERIAL:
- 4.025'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- TULIP ANGLE:
- 11°
- UNITS:
- EACH
- MODEL:
- BLACK DIAMOND™
- RIDING STYLE:
- ATV
- STEM DIAMETER IMPERIAL:
- 0.2355'
MSRP: $37.55Now: $33.80Was: $37.55 -
KIBBLEWHITE Exhaust Valve - Raptor 700 - Standard 80-80433
KIBBLEWHITE
$37.55A high-revving Raptor 700 demands valves engineered to handle extreme temperatures and sustained performance demands without compromise. This Kibblewhite exhaust valve is precision-machined from...09260255- SKU:
- 09260255
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- LENGTH IMPERIAL:
- 3.785'
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- STEM DIAMETER IMPERIAL:
- 0.2350'
- APPLICATION:
- EXHAUST
- HEAD DIAMETER METRIC:
- 32.00 MM
- MODEL:
- BLACK DIAMOND™
- TULIP ANGLE:
- 25°
$37.55 -
On Sale
MILLENNIUM Piston Kit 13016
MILLENNIUM
MSRP: $269.95Now: $173.00Was: $269.95Precision engine performance starts with superior pistons, and the MILLENNIUM 13016 delivers the tight tolerances and lightweight construction that separate high-revving reliability from mediocre...09105025- SKU:
- 09105025
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- PISTON MATERIAL:
- STEEL
- SKIRT COATING:
- MOLY COATED
- STYLE:
- BIG BORE
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- RIDING STYLE:
- UTV
- RING MATERIAL:
- NITRIDE COATED
- BORE SIZE METRIC:
- 104.00 MM
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
MSRP: $269.95Now: $173.00Was: $269.95 -
On Sale
MILLENNIUM Piston Kit K8897D500-2
MILLENNIUM
MSRP: $449.95Now: $288.00Was: $449.95Precision-engineered pistons are the foundation of any high-performance engine build. The MILLENNIUM K8897D500-2 delivers the tight tolerances and lightweight construction that serious builders...09105026- SKU:
- 09105026
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- BORE SIZE METRIC:
- 98 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLY COATED
- STYLE:
- BIG BORE
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- PISTON MATERIAL:
- STEEL
- RIDING STYLE:
- UTV
- RING MATERIAL:
- NITRIDE COATED
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- UNITS:
- KIT
MSRP: $449.95Now: $288.00Was: $449.95 -
On Sale
MILLENNIUM Piston Kit K8877D500-2
MILLENNIUM
MSRP: $449.95Now: $288.00Was: $449.95Precision engine performance demands pistons engineered to exacting tolerances. The MILLENNIUM Piston Kit K8877D500-2 delivers the tightest piston-wall clearances available, reducing friction,...09105027- SKU:
- 09105027
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- BORE SIZE METRIC:
- 85.00 MM
- PRODUCT NAME:
- PISTON KIT
- RING MATERIAL:
- NITRIDE COATED
- SKIRT COATING:
- MOLY COATED
- STYLE:
- BIG BORE
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.75:1
- PISTON MATERIAL:
- STEEL
- RIDING STYLE:
- UTV
- RIDING STYLE:
- ATV
- UNITS:
- KIT
MSRP: $449.95Now: $288.00Was: $449.95Qty in Cart: 0Quantity:Price:MSRP: $449.95Now: $288.00Was: $449.95Subtotal: -
MOOSE RACING Top End Gasket Kit - Honda TRX 250/300 810801
MOOSE RACING
$40.19Whether you're rebuilding after a piston replacement or maintaining your TRX for consistent performance, a quality gasket kit is non-negotiable—cheap seals fail under load and cost you downtime...M810801- SKU:
- M810801
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$40.19 -
MOOSE RACING Top End Gasket Kit - TE ATC/TRX 250 810802
MOOSE RACING
$39.34When you're rebuilding a top-end, the gasket and seal kit you choose determines whether your engine runs reliably or leaks oil on the dyno. MOOSE Racing delivers OEM-quality seals and precision-cut...M810802- SKU:
- M810802
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- TOP END
- RIDING STYLE:
- ATV
$39.34 -
MOOSE RACING Top End Gasket Kit - Kawasaki KLF 220 810803
MOOSE RACING
$42.36A top-end rebuild demands precision and reliability—cheap gasket sets will cost you downtime and credibility. MOOSE RACING's complete gasket kit delivers OEM-equivalent sealing with U.S.-made quality...M810803- SKU:
- M810803
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$42.36 -
MOOSE RACING Top End Gasket Kit - Kawasaki KSF 250 810804
MOOSE RACING
$55.07When you're rebuilding a KSF 250 top end, OEM gasket kits come with premium pricing that doesn't reflect the actual engineering inside. The MOOSE RACING Top End Gasket Kit delivers genuine durability...M810804- SKU:
- M810804
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$55.07Qty in Cart: 0Quantity:Price:$55.07Subtotal: -
MOOSE RACING Top End Gasket Kit - KEF/KLF/KSF 810805
MOOSE RACING
$37.29When you're rebuilding a top end, cut your downtime and costs without sacrificing reliability—Moose Racing gasket kits deliver OEM-quality seals at a fraction of the price. Whether you're replacing a...M810805- SKU:
- M810805
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- PRODUCT NAME:
- GASKET
- TYPE:
- TOP END
- UNITS:
- KIT
- RIDING STYLE:
- ATV
$37.29
