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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Cylinder Works Big Bore Cylinder Kit for Polaris RZR XP 1000 2014-2018 61003-K01
CYLINDER WORKS
$1,351.95Elevate your engine's performance with the CYLINDER WORKS Big Bore Cylinder Kit. Designed for effortless installation, this kit offers a seamless fit that mirrors OEM specifications while enhancing...09310622- SKU:
- 09310622
- Availability:
- Ships Same Business Day
- Weight:
- 9.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 98,00 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 1110 CC
- OVERBORE METRIC:
- +5.00 MM
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- RIDING STYLE:
- UTV
$1,351.95 -
Cylinder Works Big Bore Cylinder Kit Yamaha YFZ450R 2009-2017 21003-K02
CYLINDER WORKS
$873.95Upgrade your engine performance with the CYLINDER WORKS Big Bore Cylinder Kit, designed for seamless installation and optimal efficiency. This high-quality kit offers a perfect blend of durability...09310378- SKU:
- 09310378
- Availability:
- Ships Same Business Day
- Weight:
- 4.12 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- DISPLACEMENT:
- 478 CC
- CYLINDER DIAMETER:
- 98,00 MM
- ENGINE TYPE:
- 4-CYCLE
- RIDING STYLE:
- ATV
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- OVERBORE METRIC:
- +3.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
$873.95Qty in Cart: 0Quantity:Price:$873.95Subtotal: -
Cylinder Works Standard Bore Cylinder Kit for Suzuki DR-Z400 2000-2004 40001-K01
CYLINDER WORKS
$736.00Experience superior performance and reliability with the CYLINDER WORKS Cylinder Kit Standard 40001-K01. Designed for seamless installation, this kit offers a perfect fit and enhanced durability,...09310283- SKU:
- 09310283
- Availability:
- Ships Same Business Day
- Weight:
- 4.77 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- STYLE:
- STANDARD
- CYLINDER DIAMETER:
- 90,00 MM
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 90.00 MM
- RIDING STYLE:
- ATV
- COMPRESSION RATIO IMPERIAL:
- 11.3:1
- DISPLACEMENT:
- 398 CC
- ENGINE TYPE:
- 4-CYCLE
$736.00 -
Cylinder Works Cylinder Kit Standard 10005-K01 for 2006-2014 Honda TRX450ER
CYLINDER WORKS
$657.95Enhance your engine's performance with the CYLINDER WORKS Cylinder Kit Standard 10005-K01. This ready-to-install, direct bolt-on cylinder kit is designed for seamless integration, ensuring you can...09310285- SKU:
- 09310285
- Availability:
- Ships Same Business Day
- Weight:
- 4.75 LBS
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 96,00 MM
- STYLE:
- STANDARD
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- RIDING STYLE:
- ATV
$657.95 -
Cylinder Works Standard Bore Cylinder Kit 95mm Bore 12:1 Compression Yamaha YFZ450 2004-2009 2012-2013 20001-K01
CYLINDER WORKS
$750.95Upgrade your engine's performance with the CYLINDER WORKS Cylinder Kit. Designed for seamless installation, this high-quality kit offers a perfect fit with no need for re-plating, ensuring that you...09310287- SKU:
- 09310287
- Availability:
- Ships Same Business Day
- Weight:
- 4.95 LBS
- CYLINDER DIAMETER METRIC:
- 95.00 MM
- DISPLACEMENT:
- 449 CC
- ENGINE TYPE:
- 4-CYCLE
- PRODUCT NAME:
- CYLINDER KIT
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- CYLINDER BORE COATING:
- NICKEL-SILICON CARBIDE
- CYLINDER DIAMETER:
- 95,00 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- STYLE:
- STANDARD
$750.95 -
DEL WEST Intake Valve DWLTR4502IV11HF
DEL WEST
$155.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09262257- SKU:
- 09262257
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
DEL WEST Exhaust Valve DWLTR450EV11HFP
DEL WEST
$155.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09262258- SKU:
- 09262258
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- MATERIAL:
- TITANIUM
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- RIDING STYLE:
- ATV
$155.95 -
DEL WEST Exhaust Valve DWLTR4501EV11HF
DEL WEST
$171.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09262259- SKU:
- 09262259
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
$171.95Qty in Cart: 0Quantity:Price:$171.95Subtotal: -
DEL WEST Exhaust Valve DWLTR4502EV11HF
DEL WEST
$155.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09262260- SKU:
- 09262260
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
- RIDING STYLE:
- ATV
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
DEL WEST Exhaust Valve DW-TRX450R2EV11
DEL WEST
$171.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261718- SKU:
- 09261718
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
$171.95 -
DEL WEST Intake Valve DW-TRX450R-IV05
DEL WEST
$155.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261720- SKU:
- 09261720
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
- PRODUCT NAME:
- VALVE
$155.95 -
DEL WEST Intake Valve DW-TRX450R1IV05
DEL WEST
$171.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261721- SKU:
- 09261721
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
$171.95 -
DEL WEST Intake Valve DW-TRX450R2IV05
DEL WEST
$155.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261722- SKU:
- 09261722
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- INTAKE
- MATERIAL:
- TITANIUM
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
DEL WEST Intake Valve DW-CRF450R1IV02
DEL WEST
$171.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261723- SKU:
- 09261723
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$171.95Qty in Cart: 0Quantity:Price:$171.95Subtotal: -
DEL WEST Intake Valve DW-CRF450R2IV02
DEL WEST
$171.95Meets the demands of off-road, all valves are backed by an established record of performance and reliability in competition that is unapproachable09261724- SKU:
- 09261724
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$171.95 -
On Sale
Wiseco Piston Kit Honda TRX400EX 1999-2008 85.5mm 11:1 4628M08550
WISECO
MSRP: $238.95Now: $191.00Was: $238.95If you're running a Honda TRX400EX and want measurable gains in throttle response and engine reliability, a quality piston kit is non-negotiable. Wiseco pistons are engineered to tighter tolerances...09102831- SKU:
- 09102831
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE:
- +0,50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 397 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 70.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 85.50 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
MSRP: $238.95Now: $191.00Was: $238.95Qty in Cart: 0Quantity:Price:MSRP: $238.95Now: $191.00Was: $238.95Subtotal: -
On Sale
Wiseco Piston Kit 96mm 12:1 Compression Honda TRX450R 2006-2009 4899M09600
WISECO
MSRP: $243.95Now: $183.00Was: $243.95The Wiseco Piston Kit 96mm 12:1 is engineered for TRX450R/ER riders who demand reliable power delivery and durability in high-stress trail and competition conditions. A quality piston upgrade...09102844- SKU:
- 09102844
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 64.80 MM
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
MSRP: $243.95Now: $183.00Was: $243.95 -
On Sale
Wiseco Piston Kit for 2009-2015 Polaris RZR 170 40143M06200
WISECO
MSRP: $169.95Now: $144.00Was: $169.95Stock pistons in your RZR 170 limit performance and reliability under aggressive trail and racing conditions. The Wiseco Piston Kit delivers the strength and precision engineering needed to safely...09104181- SKU:
- 09104181
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 61.95 MM
- RIDING STYLE:
- UTV
- STROKE LENGTH METRIC:
- 58.00 MM
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +1,00 MM
- BORE SIZE METRIC:
- 62.00 MM
- DISPLACEMENT:
- 169 CC
- PRODUCT NAME:
- PISTON KIT
MSRP: $169.95Now: $144.00Was: $169.95Qty in Cart: 0Quantity:Price:MSRP: $169.95Now: $144.00Was: $169.95Subtotal: -
On Sale
Wiseco Piston Kit Yamaha YFM700R Raptor 2015-2021 40119M10200
WISECO
MSRP: $232.95Now: $191.00Was: $232.95Stock pistons limit your Raptor's potential—Wiseco's precision-engineered design unlocks higher compression efficiency and throttle response for both track days and trail riding. This kit delivers...09103931- SKU:
- 09103931
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 686 CC
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 102.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- STROKE LENGTH METRIC:
- 84.00 MM
MSRP: $232.95Now: $191.00Was: $232.95 -
On Sale
Wiseco Piston Kit for 2007-2014 Polaris Outlaw 90 49mm 10.5:1 40122M04900
WISECO
MSRP: $163.08Now: $144.00Was: $163.08A worn or damaged piston directly limits your Outlaw 90's power delivery and engine reliability. The Wiseco Piston Kit restores full combustion efficiency and durability with precision-engineered...09103938- SKU:
- 09103938
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 49.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- STROKE LENGTH METRIC:
- 51.00 MM
- BORE - OVERSIZE:
- +2,00 MM
- DISPLACEMENT:
- 88,50 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
MSRP: $163.08Now: $144.00Was: $163.08Qty in Cart: 0Quantity:Price:MSRP: $163.08Now: $144.00Was: $163.08Subtotal:
