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 65.50mm Piston Kit with Gaskets for Yamaha YFZ350 Banshee PK142
WISECO
$394.95A worn or damaged piston directly limits your YFZ350 Banshee's RPM capability, throttle response, and overall engine longevity. The Wiseco PK142 kit restores factory compression and sealing while its high-silicone forged construction handles sustained...09030754- SKU:
- 09030754
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- +1,50 MM
- DISPLACEMENT:
- 364 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- KIT
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE METRIC:
- +1.50 MM
- BORE SIZE METRIC:
- 65.50 MM
- PISTON DIAMETER METRIC:
- 65.50 MM
- STROKE LENGTH METRIC:
- 54.00 MM
$394.95Qty in Cart: 0Quantity:Price:$394.95Subtotal: -
Wiseco Piston Kit with Gaskets for Suzuki JR50 1978-2006 PK146
WISECO
$397.76Maximize your JR50's power output and engine longevity with a complete top-end rebuild. Wiseco's forged-piston design minimizes thermal expansion, maintaining precise ring seal and combustion efficiency even under aggressive riding conditions. This kit...09030755- SKU:
- 09030755
- Availability:
- Ships Same Business Day
- Weight:
- 2.25 LBS
- BORE - OVERSIZE METRIC:
- +2.25 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +2,25 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- DISPLACEMENT:
- 372 CC
- PISTON DIAMETER METRIC:
- 66.17 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE SIZE METRIC:
- 66.25 MM
- PRODUCT NAME:
- REBUILD KIT
$397.76 -
Wiseco Piston Kit for Kawasaki KFX80 2003-2006 673M05000
WISECO
$132.95The OEM piston in your KFX80 wasn't designed with racing in mind. This Wiseco forged piston kit replaces it with a component engineered for sustained high-RPM power and durability, giving you the compression and reliability needed to push harder on the...673M05000- SKU:
- 673M05000
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- BORE SIZE METRIC:
- 50.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH:
- 42,00 MM
- STROKE LENGTH METRIC:
- 42.00 MM
- UNITS:
- EACH
- DISPLACEMENT:
- 82 CC
- ENGINE TYPE:
- 2-STROKE
$132.95Qty in Cart: 0Quantity:Price:$132.95Subtotal: -
Wiseco Piston Kit 50mm Overbore for 1987-2006 Kawasaki KFX80 673M05050
WISECO
$119.95When you're pushing your KFX80 to its limits, stock pistons become your biggest bottleneck—compromising durability under high RPM and leaving performance on the table. The Wiseco 50mm Overbore Piston Kit delivers the strength and precision you need to...673M05050- SKU:
- 673M05050
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- BORE SIZE METRIC:
- 50.50 MM
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH:
- 42,00 MM
- STROKE LENGTH METRIC:
- 42.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- DISPLACEMENT:
- 82 CC
- ENGINE TYPE:
- 2-STROKE
$119.95 -
Wiseco Piston Kit 68.00 mm Oversize for Suzuki LT-250R QuadRacer 1988-1992 571M06800
WISECO
$204.95If you're running a Suzuki LT-250R QuadRacer and pushing for competition-level performance, a quality piston kit is non-negotiable. The Wiseco 68.00 mm oversize piston delivers the durability and power gains you need to stay competitive without...552M06800- SKU:
- 552M06800
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 68.00 MM
- PRODUCT NAME:
- PISTON
- BORE - OVERSIZE:
- +1,00 MM
- PISTON MATERIAL:
- FORGED
- DISPLACEMENT:
- 246,8 CC
- STROKE LENGTH:
- 70,00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 70.00 MM
- UNITS:
- EACH
$204.95 -
Wiseco Piston Kit 69.00 mm Oversize for Suzuki LT-250R QuadRacer 1987 552M06900
WISECO
$229.95If you're running a Suzuki LT-250R QuadRacer at the limits of competition, your factory pistons are holding back your potential. The Wiseco 69.00 mm oversize piston kit delivers the strength and precision you need to push higher RPMs and extract genuine...552M06900- SKU:
- 552M06900
- Availability:
- Ships Same Business Day
- Weight:
- 0.75 LBS
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 69.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 70.00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- DISPLACEMENT:
- 246,8 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH:
- 70,00 MM
$229.95 -
Wiseco Piston Kit 2014 Polaris RZR 800 10.2:1 PK1861
WISECO
$439.95When you're pushing your RZR 800 to its limits, stock pistons become the weak link. Wiseco's forged piston kit delivers the strength and thermal stability you need to maintain peak power output without sacrificing reliability—whether you're racing hard...09031284- SKU:
- 09031284
- Availability:
- Ships Same Business Day
- Weight:
- 2.55 LBS
- MODEL:
- FORGED SERIES
- TYPE:
- TOP END
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- UTV
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 769 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 79.94 MM
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 76.50 MM
- BORE SIZE METRIC:
- 80.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.2:1
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$439.95Qty in Cart: 0Quantity:Price:$439.95Subtotal: -
Wiseco Piston Kit 11.1:1 for 2008-2014 Polaris RZR 800 PK1862
WISECO
$439.95If you're serious about extracting maximum performance from your RZR 800, a high-compression piston kit is one of the most effective upgrades you can make. The Wiseco PK1862 delivers a measurable jump in power output through its 11.1:1 compression ratio...09031285- SKU:
- 09031285
- Availability:
- Ships Same Business Day
- Weight:
- 2.70 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 769 CC
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 79.94 MM
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 76.50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- UTV
- BORE SIZE METRIC:
- 80.00 MM
- PRODUCT NAME:
- REBUILD KIT
- SKIRT COATING:
- ARMORGLIDE®
$439.95Qty in Cart: 0Quantity:Price:$439.95Subtotal: -
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 and all necessary hardware—everything required for a...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 and durability needed for consistent performance gains,...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 sustained high-RPM abuse. This is a straightforward bolt-in...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 79.50mm piston kit delivers the precision engineering...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 precision-engineered upgrade that maintains tight...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 precision-manufactured component that reduces friction...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 friction losses—critical for maintaining consistent...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 use or upgrading to maximize performance, this complete...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 by bundling all critical internal components—pistons,...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
$797.88When 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 delivers everything needed for a comprehensive top and...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
$797.88 -
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. The Wiseco Engine Rebuild Kit PWR131A-860 delivers all...09031513- SKU:
- 09031513
- Availability:
- Ships Same Business Day
- Weight:
- 16.20 LBS
$821.95 -
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 bottom-end overhaul, eliminating guesswork and ensuring your...09031522- SKU:
- 09031522
- Availability:
- Ships Same Business Day
- Weight:
- 15.10 LBS
$766.95Qty in Cart: 0Quantity:Price:$766.95Subtotal:
