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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Wiseco Kawasaki KFX450R 2008-2014 Piston Kit PK1864
WISECO
$341.95When you're ready to maximize the displacement and reliability of your KFX450R, a quality piston kit is non-negotiable. The Wiseco PK1864 gives you forged pistons paired with a complete gasket set...09031287- SKU:
- 09031287
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- BORE SIZE METRIC:
- 96.00 MM
- DISPLACEMENT:
- 449 CC
- PRODUCT NAME:
- PISTON KIT
- STROKE LENGTH IMPERIAL:
- 2-7/16'
- COMPRESSION RATIO IMPERIAL:
- 12.4:1
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
$341.95 -
Wiseco Piston Kit 82mm 11.5:1 Compression Kawasaki KFX700 2004-2009 4896M08200
WISECO
$189.95If you're running a KFX700 and serious about extracting maximum power from your engine, an OEM piston won't cut it. The Wiseco 82mm 11.5:1 compression piston kit delivers the precision engineering...09102840- SKU:
- 09102840
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- BORE SIZE METRIC:
- 82.00 MM
- STROKE LENGTH METRIC:
- 66.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.5:1
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 697 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
$189.95Qty in Cart: 0Quantity:Price:$189.95Subtotal: -
Wiseco Piston Kit 95.50mm 11.7:1 Compression Suzuki LT-R450 2006-2009 4911M09550
WISECO
$239.95If you're running a stock LT-R450 piston or dealing with worn compression, the Wiseco 95.50mm kit restores—or exceeds—factory performance with forged aluminum construction designed to handle...09102846- SKU:
- 09102846
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 11.7:1
- DISPLACEMENT:
- 450 CC
- STROKE LENGTH METRIC:
- 62.80 MM
- BORE SIZE METRIC:
- 95.50 MM
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
Wiseco Piston Kit 79.50mm for Honda TRX350 Rancher 2000-2006 4933M07950
WISECO
$224.95If your TRX350 Rancher is showing signs of wear or you're chasing better throttle response and reliability, a quality piston kit is essential to restoring—or exceeding—factory performance. The Wiseco...09102850- SKU:
- 09102850
- Availability:
- Ships Same Business Day
- Weight:
- 0.85 LBS
- BORE SIZE METRIC:
- 79.50 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- COMPRESSION RATIO IMPERIAL:
- 8.5:1
- DISPLACEMENT:
- 325 CC
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Cam Chain for Honda TRX250X 2009-2024 CC026
WISECO
$64.95A worn or stretched cam chain directly impacts valve timing precision, leading to reduced power delivery and increased risk of catastrophic engine damage. The Wiseco CC026 replaces OEM chains with a...09250720- SKU:
- 09250720
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- NUMBER OF LINKS:
- 52
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- CHAIN SIZE:
- 92RH2015
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
Wiseco Cam Chain for Honda TRX420 Rancher 2007-2020 CC028
WISECO
$64.95The cam chain is critical to your TRX420's valve timing and engine reliability—a worn or stretched chain compromises both performance and longevity. The Wiseco CC028 replaces the stock chain with a...09250722- SKU:
- 09250722
- Availability:
- Ships Same Business Day
- Weight:
- 0.30 LBS
- TYPE:
- CAM
- CHAIN SIZE:
- 92RH2010
- UNITS:
- EACH
- PRODUCT NAME:
- CHAIN
- RIDING STYLE:
- UTV
- NUMBER OF LINKS:
- 60
- RIDING STYLE:
- ATV
$64.95Qty in Cart: 0Quantity:Price:$64.95Subtotal: -
Wiseco Cam Chain for Honda TRX450R 2004-2005 CC003
WISECO
$92.95Stock cam chains wear under sustained RPMs and high-load riding conditions, compromising valve timing and engine reliability. The Wiseco CC003 is engineered to outlast OEM chains while reducing...09250303- SKU:
- 09250303
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- NUMBER OF LINKS:
- 114
- CHAIN SIZE:
- 92RH2015
$92.95 -
Wiseco Crankshaft Kit for 2002-2008 Yamaha YFM660 Grizzly WPC148
WISECO
$666.95The Wiseco WPC148 crankshaft kit is purpose-built for the 2002-2008 Yamaha YFM660 Grizzly to deliver the reliability and precision your engine demands. Whether you're rebuilding after high-mileage...09210147- SKU:
- 09210147
- Availability:
- Ships Same Business Day
- Weight:
- 19.02 LBS
- RIDING STYLE:
- UTV
- TYPE:
- BOTTOM END
- UNITS:
- KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- MATERIAL:
- STEEL
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 84.00 MM
$666.95 -
Wiseco Engine Rebuild Kit 85mm 2005-2008 Honda TRX400EX Sportrax PWR131B-850
WISECO
$809.95When your Honda TRX400EX's engine starts showing signs of wear, a complete rebuild is your best path to restoring peak performance and reliability. The Wiseco PWR131B-850 kit eliminates the guesswork...09031610- SKU:
- 09031610
- Availability:
- Ships Same Business Day
- Weight:
- 16.40 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- 85.00 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- RIDING STYLE:
- ATV
- BORE - OVERSIZE:
- STANDARD
- UNITS:
- KIT
$809.95Qty in Cart: 0Quantity:Price:$809.95Subtotal: -
Wiseco Engine Rebuild Kit Honda TRX400EX 2005-2008 PWR131B-880
WISECO
$843.95When your Honda TRX400EX reaches high mileage or shows signs of wear, a complete engine rebuild is the most cost-effective way to restore full performance and reliability. The Wiseco PWR131B-880 kit...09031611- SKU:
- 09031611
- Availability:
- Ships Same Business Day
- Weight:
- 16.40 LBS
- BORE - OVERSIZE METRIC:
- +3.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- BORE SIZE METRIC:
- 88.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- BORE - OVERSIZE:
- +3,00 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$843.95 -
Wiseco Engine Rebuild Kit Honda TRX400EX 1999-2004 PWR131A-860
WISECO
$821.95When your TRX400EX's engine shows signs of wear—loss of compression, increased blow-by, or metal fatigue—a full rebuild is the most cost-effective way to restore original performance and reliability...09031513- SKU:
- 09031513
- Availability:
- Ships Same Business Day
- Weight:
- 16.20 LBS
$821.95Qty in Cart: 0Quantity:Price:$821.95Subtotal: -
Wiseco Engine Rebuild Kit Yamaha YFM350 Warrior 1987-2004 PWR137-835
WISECO
$766.95When your Yamaha YFM350 Warrior's engine shows wear, a piecemeal approach wastes time and money. The Wiseco Engine Rebuild Kit PWR137-835 delivers everything you need for a complete top and...09031522- SKU:
- 09031522
- Availability:
- Ships Same Business Day
- Weight:
- 15.10 LBS
$766.95Qty in Cart: 0Quantity:Price:$766.95Subtotal: -
Wiseco Valve Kit for 2006-2009 Suzuki LT-R450 QuadRacer SVKB3406
WISECO
$344.95If you're running a stock valve train on your LT-R450, you're leaving performance and reliability on the table. This Wiseco valve kit upgrades your intake and exhaust valves with precision-engineered...09263072- SKU:
- 09263072
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- APPLICATION:
- INTAKE
- MATERIAL:
- STEEL
- PRODUCT NAME:
- VALVE KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- APPLICATION:
- EXHAUST
$344.95Qty in Cart: 0Quantity:Price:$344.95Subtotal: -
Wiseco Steel Exhaust Valve Yamaha YFM700R Raptor 2006-2021 VES030
WISECO
$49.95Stock exhaust valves wear out under aggressive riding and racing conditions, leading to compression loss and reduced power output. The Wiseco VES030 replaces that worn valve with a...09262238- SKU:
- 09262238
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- APPLICATION:
- EXHAUST
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- UTV
$49.95 -
Wiseco Steel Intake Valve Yamaha YFM700R Raptor 2006-2015 VIS030
WISECO
$31.95Stock intake valves wear rapidly under sustained high-RPM operation, leading to loss of compression and reduced power output. The Wiseco VIS030 addresses this with precision engineering and advanced...09262246- SKU:
- 09262246
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- APPLICATION:
- INTAKE
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- MATERIAL:
- STAINLESS STEEL
- UNITS:
- EACH
$31.95 -
Wiseco Exhaust Valve for Yamaha YFM660F Grizzly 2002-2008 VES029
WISECO
$49.95Your Grizzly's exhaust valve is the critical component controlling combustion chamber sealing and heat management—wear it down, and you're looking at lost compression, reduced power, and catastrophic...09261741- SKU:
- 09261741
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MATERIAL:
- STAINLESS STEEL
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco Steel Intake Valve 2002-2008 Yamaha YFM660F Grizzly VIS029
WISECO
$38.95If you're running a 2002-2008 Yamaha YFM660F Grizzly at the edge of its performance envelope, intake valve wear becomes a limiting factor in reliability and throttle response. The Wiseco Steel Intake...09261748- SKU:
- 09261748
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- VALVE
- APPLICATION:
- INTAKE
- MATERIAL:
- STAINLESS STEEL
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$38.95 -
Wiseco 70mm Piston Ring Set for Kawasaki KZ900 1973-1977 2756XC
WISECO
$52.95If you're rebuilding a KZ900 or pushing your classic Kawasaki toward higher performance, ring quality directly impacts compression, oil control, and how much power actually reaches the pavement. The...2756XC- SKU:
- 2756XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- BORE SIZE METRIC:
- 70.00 MM
- RIDING STYLE:
- STREET
- UNITS:
- SET
- DISPLACEMENT:
- 223,6 CC
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
$52.95 -
Wiseco 71mm Piston Ring Set for Yamaha YFB250 Timberwolf 1992-1996 2795XC
WISECO
$52.95Piston rings are critical to engine sealing and compression—worn or improper rings tank performance and fuel economy. The Wiseco 2795XC delivers precise fitment and superior sealing specifically...2795XC- SKU:
- 2795XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- BORE SIZE METRIC:
- 71.00 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- STREET
- UNITS:
- SET
- DISPLACEMENT:
- 223,6 CC
- RIDING STYLE:
- ATV
$52.95Qty in Cart: 0Quantity:Price:$52.95Subtotal: -
Wiseco 86mm Piston Ring Set for Honda TRX400EX 1999-2008 3386XC
WISECO
$52.95Worn or damaged piston rings compromise compression, increase blow-by, and accelerate engine wear—especially critical in high-RPM and racing applications where tolerances are unforgiving. The Wiseco...3386XC- SKU:
- 3386XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 86.00 MM
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
$52.95
