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
-
VERTEX Piston Kit 23638B
VERTEX
$268.95The VERTEX Piston Kit 23638B delivers the reliability and performance you need for serious engine builds. Whether you're rebuilding a two-stroke or four-stroke, this kit provides everything required...09102125- SKU:
- 09102125
- Availability:
- Ships Same Business Day
- Weight:
- 1.29 LBS
$268.95Qty in Cart: 0Quantity:Price:$268.95Subtotal: -
VERTEX Piston Kit 23531B
VERTEX
$271.95Piston durability and ring sealing directly impact your engine's power output and longevity—especially under high boost or sustained RPM. The VERTEX 23531B delivers the metallurgical reliability you...09101967- SKU:
- 09101967
- Availability:
- Ships Same Business Day
- Weight:
- 1.06 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- PISTON DIAMETER METRIC:
- 96.97 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +3.00 MM
- CYLINDER DIAMETER METRIC:
- 97.00 MM
- DISPLACEMENT:
- 480 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- BORE - OVERSIZE:
- +3,00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
$271.95Qty in Cart: 0Quantity:Price:$271.95Subtotal: -
VERTEX Piston Kit 23523B
VERTEX
$316.95The VERTEX Piston Kit 23523B delivers the durability and precision you need for sustained high-RPM performance. Whether you're rebuilding an engine for track duty or maximizing reliability in a...09101970- SKU:
- 09101970
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
- BORE - OVERSIZE:
- +3,00 MM
- DISPLACEMENT:
- 477 CC
- BORE - OVERSIZE METRIC:
- +3.00 MM
- CYLINDER DIAMETER METRIC:
- 99.00 MM
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PISTON DIAMETER METRIC:
- 98.96 MM
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
$316.95Qty in Cart: 0Quantity:Price:$316.95Subtotal: -
VERTEX Piston Kit 23549A
VERTEX
$315.95OEM pistons wear down under sustained high-RPM operation, leading to blow-by, compression loss, and catastrophic engine failure. The VERTEX Piston Kit 23549A delivers competition-grade durability...09101740- SKU:
- 09101740
- Availability:
- Ships Same Business Day
- Weight:
- 0.99 LBS
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- DISPLACEMENT:
- 450 CC
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- PISTON DIAMETER METRIC:
- 95.95 MM
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
$315.95 -
VERTEX Piston Kit 24398B
VERTEX
$182.95A top-end rebuild demands precision components that can handle sustained high RPM loads without compromise. The VERTEX Piston Kit 24398B delivers the durability and performance reliability that...09103829- SKU:
- 09103829
- Availability:
- Ships Same Business Day
- Weight:
- 0.60 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.5:1
- CYLINDER DIAMETER METRIC:
- 93.00 MM
- DISPLACEMENT:
- 1000 CC
- RIDING STYLE:
- UTV
- STYLE:
- CAST REPLICA
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 92.97 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
$182.95Qty in Cart: 0Quantity:Price:$182.95Subtotal: -
On Sale
Wiseco Piston Kit 93mm 11:1 Compression for Polaris RZR XP 1000 2014-2021 40128M09300
WISECO
MSRP: $260.95Now: $212.00Was: $260.95If you're running a Polaris RZR XP 1000 and want measurable gains in combustion efficiency and engine durability, an OEM-quality piston upgrade is one of the most direct paths to reliable power. The...09103943- SKU:
- 09103943
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 93.00 MM
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- DISPLACEMENT:
- 999 CC
- RIDING STYLE:
- UTV
- STROKE LENGTH METRIC:
- 73.50 MM
MSRP: $260.95Now: $212.00Was: $260.95 -
Wiseco Yamaha YFZ350 Banshee 1987-2006 66mm Piston Kit with Gasket PK143
WISECO
$394.95Stock pistons can't handle the demands of high-performance 2-stroke racing—excessive heat and pressure lead to rapid wear and lost power. The Wiseco YFZ350 Banshee piston kit delivers the strength...09030620- SKU:
- 09030620
- Availability:
- Ships Same Business Day
- Weight:
- 2.30 LBS
- STROKE LENGTH METRIC:
- 54.00 MM
- DISPLACEMENT:
- 370 CC
- PISTON DIAMETER METRIC:
- 65.92 MM
- SKIRT COATING:
- NON-COATED
- PISTON SIZE METRIC:
- +2.00 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 66.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- PRO-LITE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- TYPE:
- TOP END
- UNITS:
- KIT
$394.95Qty in Cart: 0Quantity:Price:$394.95Subtotal: -
Wiseco Piston Kit 83mm for Polaris Xplorer 400 1995-2001 675M08300
WISECO
$199.95If you're running a high-mileage 400 or pushing your Xplorer to its limits on the track, factory pistons won't cut it. The Wiseco 675M08300 delivers the strength and precision engineering you need to...675M08300- SKU:
- 675M08300
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- DISPLACEMENT:
- 400 CC
- PRODUCT NAME:
- PISTON
- STROKE LENGTH:
- 70,00 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- UNITS:
- EACH
- BORE - OVERSIZE:
- STANDARD
- BORE SIZE METRIC:
- 83.00 MM
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 70.00 MM
$199.95 -
Wiseco Crankshaft Kit for Honda TRX400EX 1999-2004 WPC131A
WISECO
$584.95A worn or damaged crankshaft compromises engine reliability and performance across the board—acceleration suffers, power delivery becomes inconsistent, and you risk catastrophic internal failure. The...09210118- SKU:
- 09210118
- Availability:
- Ships Same Business Day
- Weight:
- 14.50 LBS
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- RIDING STYLE:
- ATV
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- UNITS:
- KIT
$584.95Qty in Cart: 0Quantity:Price:$584.95Subtotal: -
Wiseco Crankshaft Kit Honda TRX400X 2009-2014 WPC131B
WISECO
$584.95If you're rebuilding the bottom end of your TRX400X, settling for OEM internals limits your potential for reliability and consistent performance under load. This Wiseco kit delivers factory-assembled...09210478- SKU:
- 09210478
- Availability:
- Ships Same Business Day
- Weight:
- 14.25 LBS
- RIDING STYLE:
- ATV
- TYPE:
- BOTTOM END
- MATERIAL:
- STEEL
- UNITS:
- KIT
- FEATURES:
- INCLUDES BEARING AND GASKET
- PRODUCT NAME:
- CRANKSHAFT KIT
$584.95Qty in Cart: 0Quantity:Price:$584.95Subtotal: -
Wiseco Crankshaft Assembly for 2005-2013 Yamaha Raptor 350 WPC137
WISECO
$554.95Whether you're rebuilding a tired 350cc engine or pushing your Raptor's performance envelope, a quality crankshaft assembly is non-negotiable. The Wiseco WPC137 delivers factory-spec reliability with...09210145- SKU:
- 09210145
- Availability:
- Ships Same Business Day
- Weight:
- 13.51 LBS
- MATERIAL:
- STEEL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- FEATURES:
- INCLUDES BEARING AND GASKET
- STROKE LENGTH METRIC:
- 64.50 MM
- TYPE:
- BOTTOM END
$554.95Qty in Cart: 0Quantity:Price:$554.95Subtotal: -
Wiseco Engine Rebuild Kit for 2001-2004 Honda TRX400EX PWR131A-870
WISECO
$844.95A complete engine rebuild demands precision components that won't compromise reliability when you need it most. This Wiseco kit delivers OEM-spec or better parts for the 400EX platform, eliminating...09031514- SKU:
- 09031514
- Availability:
- Ships Same Business Day
- Weight:
- 15.85 LBS
$844.95Qty in Cart: 0Quantity:Price:$844.95Subtotal: -
Wiseco Ring Set 66mm 1985-1988 Suzuki LT230S 1987-1996 Suzuki LT-4WD QuadRunner 250 2598XD
WISECO
$49.95Piston rings are critical to engine performance—they seal combustion pressure, regulate oil consumption, and directly impact horsepower and reliability. The Wiseco 2598XD ring set delivers precision...2598XD- SKU:
- 2598XD
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PISTON MATERIAL:
- ALUMINUM
- DISPLACEMENT:
- 249 CC
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- BORE SIZE METRIC:
- 66.35 MM
- DISPLACEMENT:
- 229 CC
- RIDING STYLE:
- ATV
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco 67mm Piston Ring Set for Honda ATC185 1980 1981-1983 ATC185S 1981-1983 ATC200 1984 ATC200S 1984-1986 TRX200 1983-2002 XR200R Kawasaki KLF220 Bayou 1988-2002 2638XC
WISECO
$49.95Worn or damaged piston rings directly reduce combustion efficiency, increase blow-by, and accelerate engine wear—making a quality ring set essential for reliable performance. The Wiseco 2638XC...2638XC- SKU:
- 2638XC
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- DISPLACEMENT:
- 191,8 CC
- PRODUCT NAME:
- PISTON RING
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 67.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- SET
$49.95Qty in Cart: 0Quantity:Price:$49.95Subtotal: -
Wiseco Piston Kit 67mm 9.3:1 Compression Kawasaki KLF220 Bayou 1988-2002 4670M06700
WISECO
$128.95If you're pushing your KLF220 Bayou harder than stock tolerances allow, a quality piston kit is non-negotiable—and the Wiseco 4670M06700 delivers the durability and precision you need for both trail...4670M06700- SKU:
- 4670M06700
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 67.00 MM
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 61.00 MM
- UNITS:
- KIT
- MODEL:
- FORGED SERIES
- COMPRESSION RATIO IMPERIAL:
- 9.3:1
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 66.95 MM
- RIDING STYLE:
- ATV
- DISPLACEMENT:
- 215 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
$128.95Qty in Cart: 0Quantity:Price:$128.95Subtotal: -
On Sale
Wossner Connecting Rod Yamaha YFS200 Blaster 1988-2006 P2030
WOSSNER
MSRP: $122.00Now: $115.90Was: $122.00If you're rebuilding your YFS200 Blaster engine, the connecting rod is a critical component that directly impacts power delivery, reliability, and longevity. Wössner's forged 8620 alloy construction...09230566- SKU:
- 09230566
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
- STYLE:
- STANDARD
- RIDING STYLE:
- STREET
- UNITS:
- KIT
MSRP: $122.00Now: $115.90Was: $122.00Qty in Cart: 0Quantity:Price:MSRP: $122.00Now: $115.90Was: $122.00Subtotal: -
On Sale
Wossner Piston Kit Yamaha YFS200 Blaster 1988-2006 8101D150
WOSSNER
MSRP: $122.00Now: $115.90Was: $122.00A worn or damaged piston directly compromises engine compression, throttle response, and overall reliability—especially critical in 2-stroke applications where piston integrity is non-negotiable. The...09105529- SKU:
- 09105529
- Availability:
- Ships Same Business Day
- Weight:
- 0.71 LBS
- BORE - OVERSIZE:
- +1,50 MM
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 195 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE METRIC:
- +1.50 MM
- MODEL:
- STANDARD SERIES
- PISTON SIZE METRIC:
- 67.44 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
MSRP: $122.00Now: $115.90Was: $122.00Qty in Cart: 0Quantity:Price:MSRP: $122.00Now: $115.90Was: $122.00Subtotal: -
On Sale
Wossner Yamaha YFS200 Blaster 1988-2006 Piston Kit 8101D200
WOSSNER
MSRP: $122.00Now: $115.90Was: $122.00The Wossner 8101D200 piston kit restores your YFS200 Blaster to factory specifications or serves as a reliable upgrade path for higher-load riding. With 4032 T6 forged aluminum and a permanent skirt...09105530- SKU:
- 09105530
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE:
- +2,00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- BORE SIZE METRIC:
- 68.00 MM
- DISPLACEMENT:
- 195 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PISTON SIZE METRIC:
- 67.94 MM
- TYPE:
- DUAL RING
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
MSRP: $122.00Now: $115.90Was: $122.00Qty in Cart: 0Quantity:Price:MSRP: $122.00Now: $115.90Was: $122.00Subtotal: -
HOT RODS Crankshaft Bearings HR00024
HOT RODS
$176.95Worn crankshaft bearings compromise engine reliability and can lead to catastrophic failure if left unchecked. The HOT RODS HR00024 main bearing and seal kit restores proper clearances and oil film...09240598- SKU:
- 09240598
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
- PRODUCT NAME:
- BEARING
- UNITS:
- KIT
- TYPE:
- ENGINE
- APPLICATION:
- CRANKSHAFT
- RIDING STYLE:
- UTV
$176.95 -
HOT RODS Connecting Rod 8708
HOT RODS
$203.95If you're building a high-rpm engine or rebuilding a tired block, your connecting rods are critical to reliability and longevity. The HOT RODS 8708 delivers the strength and precision engineering...09230376- SKU:
- 09230376
- Availability:
- Ships Same Business Day
- Weight:
- 1.55 LBS
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- ENGINE TYPE:
- 4-CYCLE
- MATERIAL:
- 8620 STEEL
- STYLE:
- HEAVY DUTY
$203.95
