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
-
On Sale
ATHENA Cylinder Kit - YZ450F - 98mm P400485100016
ATHENA
MSRP: $820.95Now: $739.00Was: $820.95The ATHENA Cylinder Kit for YZ450F delivers measurable displacement gains and thermal efficiency improvements that translate directly to higher horsepower and reliability in competition or trail conditions. The 98mm bore represents a significant step up...09310022- SKU:
- 09310022
- Availability:
- Ships Same Business Day
- Weight:
- 4.51 LBS
- DISPLACEMENT:
- 478 CC
- ENGINE TYPE:
- 4-STROKE
- MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 98.00 MM
- CYLINDER BORE COATING:
- NICKEL-CARBIDE
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
MSRP: $820.95Now: $739.00Was: $820.95Qty in Cart: 0Quantity:Price:MSRP: $820.95Now: $739.00Was: $820.95Subtotal: -
Hot Cams Exhaust Valve for 2013-2014 Polaris RZR 900 HC00040
HOT CAMS
$39.95Your RZR 900's exhaust valve is the critical bridge between combustion and exhaust flow—any weakness here directly impacts horsepower, throttle response, and engine longevity. The HOT CAMS HC00040 replaces marginal OEM valve geometry with forged...09263113- SKU:
- 09263113
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BASE COLOR:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.460 MM
- UNITS:
- EACH
- COLOR/FINISH:
- BLACK
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
$39.95 -
Hot Cams Steel Exhaust Valve for Polaris Sportsman 850 XP 2009-2011 HC00039
HOT CAMS
$25.95Your Polaris Sportsman 850 XP's engine performance depends on valves that can handle extreme heat cycling and high RPM demands. This HOT CAMS forged exhaust valve is engineered for precision fitment and durability, delivering reliable sealing and reduced...09263112- SKU:
- 09263112
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- BASE COLOR:
- BLACK
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- COLOR/FINISH:
- BLACK
- STEM DIAMETER METRIC:
- 5.480 MM
- UNITS:
- EACH
$25.95 -
Hot Cams Steel Exhaust Valve for Polaris Ranger XP 1000 2017 HC00038
HOT CAMS
$48.95Factory exhaust valves wear down under sustained load and high RPM operation, causing compression loss and reduced power output. The Hot Cams HC00038 is a precision forged replacement that restores OEM performance while delivering the durability needed...09263111- SKU:
- 09263111
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- EXHAUST
- BASE COLOR:
- BLACK
- STEM DIAMETER METRIC:
- 5.460 MM
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
$48.95 -
Hot Cams Steel Exhaust Valve for Polaris Sportsman 550 2012-2014 HC00037
HOT CAMS
$71.95Your Polaris Sportsman 550's engine demands a valve that can withstand extreme heat cycles and valve train stress without compromising sealing integrity. The HOT CAMS HC00037 Exhaust Valve is a forged, precision-engineered OEM replacement that...09263110- SKU:
- 09263110
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- EXHAUST
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- BASE COLOR:
- BLACK
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.95 MM
- UNITS:
- EACH
$71.95 -
Hot Cams Intake Valve for 2018 Polaris Scrambler 850 HC00036
HOT CAMS
$39.95The HOT CAMS Intake Valve HC00036 restores flow efficiency and sealing integrity to your 2018 Polaris Scrambler 850, directly impacting throttle response and engine reliability under sustained high-RPM operation. Factory intake valves wear gradually,...09263109- SKU:
- 09263109
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- BASE COLOR:
- BLACK
- OUTSIDE DIAMETER METRIC:
- 30 MM
- APPLICATION:
- INTAKE
- COLOR/FINISH:
- BLACK
- LENGTH METRIC:
- 118.60 MM
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.49 MM
- UNITS:
- EACH
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
$39.95Qty in Cart: 0Quantity:Price:$39.95Subtotal: -
Hot Cams Intake Valve for 2004 Polaris ATP 500 HC00035
HOT CAMS
$54.95If you're running your ATP 500 hard, your intake valve needs to match that intensity. The HOT CAMS HC00035 delivers the precision engineering and durability required for sustained high-performance operation, with advanced coatings designed to handle...09263108- SKU:
- 09263108
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- BASE COLOR:
- BLACK
- LENGTH METRIC:
- 101 MM
- OUTSIDE DIAMETER METRIC:
- 31.00 MM
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- COLOR/FINISH:
- BLACK
- STEM DIAMETER METRIC:
- 5.95 MM
- UNITS:
- EACH
$54.95 -
Hot Cams Steel Intake Valve for Polaris RZR 570 2012-2013 HC00034
HOT CAMS
$39.95Your Polaris RZR 570's engine demands precision components that can handle sustained high RPM operation without compromise. The HOT CAMS HC00034 intake valve delivers the reliability and airflow efficiency needed to maintain peak performance, whether...09263107- SKU:
- 09263107
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BASE COLOR:
- BLACK
- RIDING STYLE:
- UTV
- COLOR/FINISH:
- BLACK
- STEM DIAMETER METRIC:
- 5.480 MM
- PRODUCT NAME:
- VALVE
$39.95 -
Hot Cams Steel Exhaust Valve for Polaris Sportsman 400 HO 2008-2014 HC00033
HOT CAMS
$75.95Factory exhaust valves wear under sustained RPM and heat cycles, robbing your Sportsman 400 HO of compression and throttle response. This Hot Cams replacement restores proper sealing and flow characteristics while delivering significantly longer service...09263106- SKU:
- 09263106
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BASE COLOR:
- BLACK
- STEM DIAMETER METRIC:
- 5.95 MM
- APPLICATION:
- EXHAUST
- COLOR/FINISH:
- BLACK
$75.95 -
Hot Cams Steel Intake Valve Polaris Ranger 800 2010-2014 HC00032
HOT CAMS
$29.95Factory intake valves wear down under sustained performance use, leading to loss of compression, poor sealing, and reduced engine efficiency. The HOT CAMS HC00032 intake valve restores and exceeds OEM performance with forged construction and precision...09263105- SKU:
- 09263105
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.98 MM
- UNITS:
- EACH
- BASE COLOR:
- BLACK
- COLOR/FINISH:
- BLACK
$29.95 -
Hot Cams Steel Exhaust Valve for Polaris Ranger 800 2011-2014 HC00031
HOT CAMS
$48.95Your Polaris Ranger 800's exhaust valves endure extreme thermal and mechanical stress, and OEM components can fail prematurely under high-load conditions. The HOT CAMS HC00031 is a forged-steel replacement that delivers superior durability, improved...09263104- SKU:
- 09263104
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- STEM DIAMETER METRIC:
- 5.97 MM
- APPLICATION:
- EXHAUST
- BASE COLOR:
- BLACK
$48.95 -
Hot Cams Steel Exhaust Valve for 2014-2016 Polaris Ranger 570 HC00030
HOT CAMS
$54.95If you're running a 2014-2016 Polaris Ranger 570, valve quality directly impacts engine reliability and power delivery under load. The HOT CAMS HC00030 exhaust valve is engineered to withstand the thermal and mechanical stress of repeated combustion...09263103- SKU:
- 09263103
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- BLACK
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- UNITS:
- EACH
- BASE COLOR:
- BLACK
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.460 MM
- MATERIAL:
- STEEL
$54.95 -
Hot Cams Steel Intake Valve for Polaris RZR 900 2015-2018 HC00029
HOT CAMS
$39.95Stock intake valves can become a bottleneck in your RZR 900's breathing efficiency, particularly under sustained high-RPM conditions or aggressive riding. The HOT CAMS HC00029 is a one-piece forged replacement engineered to restore—and exceed—OEM...09263102- SKU:
- 09263102
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- COLOR/FINISH:
- BLACK
- OUTSIDE DIAMETER METRIC:
- 34.40 MM
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.47 MM
- MATERIAL:
- STEEL
- APPLICATION:
- INTAKE
- BASE COLOR:
- BLACK
- LENGTH METRIC:
- 95.850 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$39.95 -
Hot Cams Steel Intake Valve for 2012-2014 Polaris Sportsman 550 HC00028
HOT CAMS
$39.95Stock intake valves wear down quickly under regular riding conditions, leading to loss of compression, poor fuel economy, and reduced power delivery. The Hot Cams HC00028 restores your Sportsman 550's breathing efficiency with a forged,...09263101- SKU:
- 09263101
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- BASE COLOR:
- BLACK
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- ATV
- STEM DIAMETER METRIC:
- 5.95 MM
- UNITS:
- EACH
$39.95 -
Hot Cams Titanium Exhaust Valve for 2006-2009 Suzuki LT-R450 QuadRacer 8400024-1
HOT CAMS
$150.95The stock exhaust valve on your LT-R450 QuadRacer is one of the hardest-working components in your engine—and also one of the first to show wear under sustained high RPM operation. Hot Cams' titanium exhaust valve delivers the precision engineering and...09262977- SKU:
- 09262977
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- TITANIUM
- APPLICATION:
- EXHAUST
- BASE COLOR:
- BLACK
- PRODUCT NAME:
- VALVE
- STEM DIAMETER METRIC:
- 5.47 MM
- UNITS:
- EACH
- RIDING STYLE:
- ATV
$150.95 -
DEL WEST Exhaust Valve DWTRX450R2EV04
DEL WEST
$155.95Off-road performance demands a valve that can handle extreme temperatures, abrasive conditions, and continuous high-rpm operation without compromise. The DEL WEST Exhaust Valve DWTRX450R2EV04 is engineered specifically for this environment, drawing on a...09261761- SKU:
- 09261761
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$155.95 -
DEL WEST Exhaust Valve DWTRX450R1EV04
DEL WEST
$155.95Off-road engines demand exhaust valves engineered for extreme conditions—and DEL WEST delivers the durability that wins races. This valve is built from competition-proven designs that handle peak cylinder pressures, rapid thermal cycling, and the...09261760- SKU:
- 09261760
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- APPLICATION:
- EXHAUST
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
$155.95 -
DEL WEST Exhaust Valve DWTRX450REV04
DEL WEST
$155.95Off-road racing demands exhaust components that can withstand extreme temperatures, abrasive conditions, and sustained high RPM operation. The DEL WEST Exhaust Valve DWTRX450REV04 delivers the reliability and performance precision you need when margin...09261759- SKU:
- 09261759
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$155.95Qty in Cart: 0Quantity:Price:$155.95Subtotal: -
DEL WEST Intake Valve DWYFZ450R12IV03
DEL WEST
$155.95Off-road racing demands valve components engineered for extreme conditions—high RPM reliability, thermal cycling, and sustained performance under competition stress. The DEL WEST Intake Valve DWYFZ450R12IV03 delivers the durability and precision your...09261758- SKU:
- 09261758
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- MATERIAL:
- TITANIUM
$155.95 -
Hot Cams Cam Chain Tensioner for Polaris ACE 570 2016-2017 HC00063
HOT CAMS
$170.95Hydraulic cam chain tensioners are prone to pressure loss and inconsistency, leading to slack chains, valve timing drift, and costly engine damage. The Hot Cams mechanical automatic tensioner eliminates these failure points with a sealed, spring-loaded...09251318- SKU:
- 09251318
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- PRODUCT NAME:
- CAM CHAIN TENSIONER
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$170.95Qty in Cart: 0Quantity:Price:$170.95Subtotal:
