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
-
Wiseco Crankshaft Kit for 2008-2010 Polaris RZR 800 WPC223A
WISECO
$987.77The crankshaft is the backbone of your engine's reliability and performance—especially when you're pushing your RZR 800 hard in the field or on the track. Wiseco's WPC223A kit comes fully assembled with factory precision and includes everything you need...09210882- SKU:
- 09210882
- Availability:
- Ships Same Business Day
- Weight:
- 24.60 LBS
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- CRANKSHAFT KIT
- UNITS:
- KIT
- RIDING STYLE:
- UTV
$987.77 -
Wiseco Crankshaft Kit for Polaris RZR 800 2011-2014 WPC223B
WISECO
$999.95A complete bottom-end rebuild demands precision engineering and uncompromising reliability—especially when you're pushing your RZR 800 to its limits. The Wiseco WPC223B kit eliminates the guesswork of sourcing individual components by delivering a...09210883- SKU:
- 09210883
- Availability:
- Ships Same Business Day
- Weight:
- 23.90 LBS
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$999.95 -
Wiseco Crankshaft Assembly for Yamaha YFM660R Raptor 2001-2005 WPC133
WISECO
$666.95When you're rebuilding your YFM660R Raptor's bottom end, you need a crankshaft assembly that matches the precision of your engine's demands. Wiseco's WPC133 delivers factory-assembled reliability with shot-peened surfaces and double-forged connecting...09210144- SKU:
- 09210144
- Availability:
- Ships Same Business Day
- Weight:
- 17.11 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- TYPE:
- BOTTOM END
- UNITS:
- KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 84.00 MM
$666.95Qty in Cart: 0Quantity:Price:$666.95Subtotal: -
Wiseco Engine Rebuild Kit for Yamaha Banshee 1987-2006 PWR100-640
WISECO
$1,069.95When your Banshee's engine has logged serious hours, a complete rebuild is the only path to restoring factory reliability and performance. The Wiseco Engine Rebuild Kit PWR100-640 delivers every critical component you need—crankshaft, rod assembly,...09031486- SKU:
- 09031486
- Availability:
- Ships Same Business Day
- Weight:
- 17.35 LBS
- BORE SIZE METRIC:
- 64.00 MM
- DISPLACEMENT:
- 350 CC
- PRODUCT NAME:
- REBUILD KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- TYPE:
- ENGINE
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- UNITS:
- KIT
- OVERBORE METRIC:
- STANDARD
$1,069.95Qty in Cart: 0Quantity:Price:$1,069.95Subtotal: -
Wiseco Engine Rebuild Kit for Yamaha YFZ350 Banshee 1987-2006 PWR100-645
WISECO
$1,099.95When your Banshee's engine reaches the end of its service life, a quality rebuild kit is the difference between a reliable machine and a money pit. The Wiseco PWR100-645 delivers complete top and bottom-end components engineered to OEM specifications, so...09031487- SKU:
- 09031487
- Availability:
- Ships Same Business Day
- Weight:
- 17.40 LBS
- DISPLACEMENT:
- 350 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- 64.50 MM
- FEATURES:
- PROLITE® PISTON
- OVERBORE METRIC:
- +0.50 MM
$1,099.95 -
Wiseco Engine Rebuild Kit for Yamaha YFZ350 Banshee 1987-2006 PWR100-650
WISECO
$1,099.95Your Banshee's engine is the heart of its performance—and a worn crankshaft, compromised bearings, or degraded seals will kill both power and reliability. The Wiseco Engine Rebuild Kit gives you everything needed for a complete top and bottom-end...09031488- SKU:
- 09031488
- Availability:
- Ships Same Business Day
- Weight:
- 17.48 LBS
- BORE SIZE METRIC:
- 65.00 MM
- DISPLACEMENT:
- 350 CC
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- RIDING STYLE:
- ATV
- OVERBORE METRIC:
- +1.00 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- UNITS:
- KIT
- FEATURES:
- PROLITE® PISTON
$1,099.95 -
Wiseco Engine Rebuild Kit Yamaha YFZ350 Banshee 1987-2006 PWR100-655
WISECO
$1,132.95Engine wear is inevitable on the trail, but catastrophic failure isn't. The Wiseco Engine Rebuild Kit gives you factory-engineered components to restore your Banshee's compression, reliability, and throttle response—whether you're rebuilding after...09031489- SKU:
- 09031489
- Availability:
- Ships Same Business Day
- Weight:
- 17.28 LBS
- ENGINE TYPE:
- 2-STROKE
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 65.50 MM
- DISPLACEMENT:
- 350 CC
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- OVERBORE METRIC:
- +1.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
$1,132.95 -
Wiseco Engine Rebuild Kit Yamaha YFZ350 Banshee 1987-2006 PWR100-660
WISECO
$1,121.95If you're running a Banshee hard, an engine rebuild isn't a question of if—it's when. The Wiseco PWR100-660 gives you everything needed for a complete top and bottom-end refresh, with OEM-grade components and precision engineering that'll get your...09031490- SKU:
- 09031490
- Availability:
- Ships Same Business Day
- Weight:
- 17.50 LBS
- BORE SIZE METRIC:
- 66.00 MM
- DISPLACEMENT:
- 350 CC
- OVERBORE METRIC:
- +2.00 MM
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- ENGINE
- MODEL:
- GARAGE BUDDY
- UNITS:
- KIT
- FEATURES:
- PROLITE® PISTON
$1,121.95Qty in Cart: 0Quantity:Price:$1,121.95Subtotal: -
Wiseco Engine Rebuild Kit for Yamaha YFS200 Blaster 1988-2006 PWR105-660
WISECO
$588.95If your Yamaha Blaster's engine has logged serious trail hours, an engine rebuild is the most cost-effective way to restore lost compression, oil pressure, and overall reliability. The Wiseco PWR105-660 kit eliminates the guesswork by bundling every...09031492- SKU:
- 09031492
- Availability:
- Ships Same Business Day
- Weight:
- 10.35 LBS
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- BORE SIZE METRIC:
- 66.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 200 CC
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- OVERBORE METRIC:
- STANDARD
- UNITS:
- KIT
$588.95Qty in Cart: 0Quantity:Price:$588.95Subtotal: -
Wiseco Engine Rebuild Kit for 1988-2006 Yamaha YFS200 Blaster 66.50mm PWR105-665
WISECO
$534.95When your Yamaha Blaster's engine reaches the end of its service life, a complete rebuild with OEM-quality components is the most cost-effective path to restoring full performance and reliability. The Wiseco PWR105-665 kit eliminates the guesswork by...09031493- SKU:
- 09031493
- Availability:
- Ships Same Business Day
- Weight:
- 10.50 LBS
- OVERBORE METRIC:
- +0.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- ENGINE
- DISPLACEMENT:
- 200 CC
- FEATURES:
- PROLITE® PISTON
- MODEL:
- GARAGE BUDDY
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 66.50 MM
$534.95Qty in Cart: 0Quantity:Price:$534.95Subtotal: -
Wiseco Engine Rebuild Kit Yamaha YFS200 Blaster 1988-2006 PWR105-670
WISECO
$534.95When your Yamaha Blaster's engine shows signs of wear—whether from years of trail riding or track abuse—a complete rebuild is your most cost-effective path to restored performance and reliability. The Wiseco Engine Rebuild Kit delivers all top and...09031494- SKU:
- 09031494
- Availability:
- Ships Same Business Day
- Weight:
- 10.25 LBS
- TYPE:
- ENGINE
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 200 CC
- FEATURES:
- PROLITE® PISTON
- OVERBORE METRIC:
- +1.00 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE SIZE METRIC:
- 67.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- GARAGE BUDDY
- UNITS:
- KIT
$534.95Qty in Cart: 0Quantity:Price:$534.95Subtotal: -
Wiseco Engine Rebuild Kit for Honda TRX400EX 2005-2008 PWR131B-860
WISECO
$809.95When your Honda TRX400EX's engine shows signs of wear—loss of compression, increased blow-by, or declining power delivery—a complete rebuild restores it to factory specifications and reliability. The Wiseco Engine Rebuild Kit PWR131B-860 supplies every...09031515- SKU:
- 09031515
- Availability:
- Ships Same Business Day
- Weight:
- 16.40 LBS
$809.95Qty in Cart: 0Quantity:Price:$809.95Subtotal: -
Wiseco 66mm Piston Ring Set for Honda ATC185 1980 XR200R 1980-1983 2598XC
WISECO
$52.95Original piston rings wear out faster than you'd expect, leading to increased blow-by, oil consumption, and lost compression—all of which tank your engine's efficiency and reliability. The Wiseco 2598XC ring set restores proper sealing and combustion...2598XC- SKU:
- 2598XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DISPLACEMENT:
- 191,8 CC
- UNITS:
- SET
- PISTON MATERIAL:
- ALUMINUM
- BORE SIZE METRIC:
- 66.35 MM
- PRODUCT NAME:
- PISTON RING
- DISPLACEMENT:
- 199 CC
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$52.95 -
Wiseco Piston Ring Set 65mm Bore Honda ATC200X 1983-1987 2559XC
WISECO
$52.95Worn or damaged piston rings cause compression loss, excessive oil consumption, and poor throttle response—issues that plague aging ATC200X engines. The Wiseco 2559XC ring set restores proper cylinder sealing, giving you back the power and efficiency...2559XC- SKU:
- 2559XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 65.00 MM
- DISPLACEMENT:
- 191,8 CC
- DISPLACEMENT:
- 199 CC
- UNITS:
- SET
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- PISTON RING
$52.95 -
Wiseco Piston Kit 75.50mm 11:1 Compression Honda TRX300EX 1993-2008 4574M07550
WISECO
$209.95If you're running a TRX300EX and want measurable gains in displacement and compression, a quality piston kit is one of the most effective bolt-on upgrades available. The Wiseco 75.50mm 11:1 compression kit delivers the precision engineering and...09100377- SKU:
- 09100377
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- DISPLACEMENT:
- 293 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 65.50 MM
- BORE - OVERSIZE METRIC:
- +1.50 MM
- PRODUCT NAME:
- PISTON
- BORE SIZE METRIC:
- 75.50 MM
- BORE - OVERSIZE:
- +1,50 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$209.95Qty in Cart: 0Quantity:Price:$209.95Subtotal: -
Wiseco Piston Kit 52.00mm Standard Bore for 2001-2005 Polaris Sportsman 90 839M05200
WISECO
$128.95When your Polaris Sportsman 90 needs a fresh top end, the Wiseco Piston Kit delivers the precision fit and durability required to restore—or exceed—original performance. This standard bore kit is engineered to improve combustion efficiency and engine...09100381- SKU:
- 09100381
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- DISPLACEMENT:
- 89 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 41.90 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 52.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- UNITS:
- EACH
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
$128.95 -
Wiseco Piston Kit Yamaha YFZ450R 2009-2013 98mm 12.5:1 4906M09800
WISECO
$309.95A worn or stock piston limits your YFZ450R's potential—this Wiseco big-bore kit reclaims horsepower and torque while delivering the durability needed for serious riding. The 98mm bore with 12.5:1 compression ratio extracts more power from each combustion...09102845- SKU:
- 09102845
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE - OVERSIZE:
- +3,00 MM
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- DISPLACEMENT:
- 478 CC
- STROKE LENGTH METRIC:
- 62.00 MM
- DISPLACEMENT:
- 467 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE METRIC:
- +3.00 MM
- BORE SIZE METRIC:
- 98.00 MM
$309.95 -
Wiseco Piston Kit Yamaha YFM450 Grizzly 2007-2014 4939M08450
WISECO
$224.95When your YFM450 Grizzly's factory pistons start showing wear, you're losing compression, power, and efficiency. The Wiseco 4939M08450 piston kit restores your engine to peak performance with precision-engineered components built to withstand repeated...09102851- SKU:
- 09102851
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 75.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 420 CC
- BORE SIZE METRIC:
- 84.50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- UTV
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit Yamaha YFM450 Grizzly 2007-2014 4939M08500
WISECO
$224.95Whether you're rebuilding your YFM450 Grizzly after hard trail use or maximizing output on your performance build, the Wiseco Piston Kit delivers the precision engineering and durability that separates reliable power from catastrophic failure. Wiseco's...09102852- SKU:
- 09102852
- Availability:
- Ships Same Business Day
- Weight:
- 0.97 LBS
- BORE SIZE METRIC:
- 85.00 MM
- DISPLACEMENT:
- 420 CC
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- STROKE LENGTH METRIC:
- 75.00 MM
- UNITS:
- EACH
- BORE - OVERSIZE:
- +0,50 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- BORE - OVERSIZE METRIC:
- +0.50 MM
- RIDING STYLE:
- UTV
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit 85.50mm 11:1 Compression Yamaha YFM450 Grizzly 2007-2014 4939M08550
WISECO
$224.95A worn or stock piston limits your Grizzly's potential for consistent power delivery and fuel efficiency. The Wiseco 4939M08550 piston kit delivers precision-engineered internals built to handle aggressive riding while maintaining durability across...09102853- SKU:
- 09102853
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 85.50 MM
- DISPLACEMENT:
- 420 CC
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 75.00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE - OVERSIZE:
- +1,00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- UTV
$224.95
