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 Honda TRX300 FourTrax 1988-2000 Piston Kit 74.50mm Bore 10.25:1 Compression PK1043
WISECO
$263.95When you're rebuilding your TRX300 engine or pushing higher RPMs, stock pistons become a liability. Wiseco's forged piston kit delivers the thermal stability and durability you need to run...09030329- SKU:
- 09030329
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
- BORE SIZE METRIC:
- 74.50 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 74.45 MM
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 65.50 MM
- BORE - OVERSIZE:
- +0,50 MM
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- DISPLACEMENT:
- 282 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$263.95 -
Wiseco Piston Kit 76mm 8.6:1 Compression for Kawasaki KLF300 Bayou 1986-2003 PK1050
WISECO
$239.95A worn or stock piston setup limits your Bayou 300's potential for power and reliability under demanding conditions. This Wiseco kit delivers a complete top-end solution with forged internals...09030331- SKU:
- 09030331
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- DISPLACEMENT:
- 290 CC
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 75.95 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 64.00 MM
- BORE SIZE METRIC:
- 76.00 MM
- COMPRESSION RATIO IMPERIAL:
- 8.6:1
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
Wiseco Piston Kit Honda TRX250R 1986 PK1073
WISECO
$291.95When you're pushing your TRX250R to its limits, factory pistons become your weak link. This Wiseco Piston Kit delivers the strength and precision engineering needed to survive high-RPM demands and...09030332- SKU:
- 09030332
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE SIZE METRIC:
- 66.00 MM
- MODEL:
- PRO-LITE
- TYPE:
- TOP END
- UNITS:
- KIT
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 72.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 246 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 65.92 MM
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- PRODUCT NAME:
- REBUILD KIT
$291.95Qty in Cart: 0Quantity:Price:$291.95Subtotal: -
Wiseco Piston Kit Kawasaki KFX80 2003-2006 PK1101
WISECO
$169.95When you're rebuilding the top end on your KFX80, compromising on piston quality means compromising on reliability and peak performance. Wiseco's forged piston kit delivers the thermal stability and...09030369- SKU:
- 09030369
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 82 CC
- PISTON DIAMETER METRIC:
- 50.42 MM
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +0.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 42.00 MM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 50.50 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$169.95Qty in Cart: 0Quantity:Price:$169.95Subtotal: -
Wiseco Piston Kit for Suzuki LT80 1987-2006 PK1103
WISECO
$169.95If you're running a Suzuki LT80, a quality piston kit is essential for maintaining engine reliability and extracting consistent power from your 2-cycle engine. Wiseco's forged aluminum construction...09030370- SKU:
- 09030370
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- BORE SIZE METRIC:
- 51.00 MM
- ENGINE TYPE:
- 2-STROKE
- TYPE:
- TOP END
- BORE - OVERSIZE METRIC:
- +1.00 MM
- PISTON DIAMETER METRIC:
- 50.92 MM
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 82 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 42.00 MM
$169.95Qty in Cart: 0Quantity:Price:$169.95Subtotal: -
Wiseco Piston Kit for 1994-2003 Polaris Sportsman 400 4x4 PK1109
WISECO
$269.95A worn piston is one of the most common culprits behind power loss and reliability issues in your Polaris Sportsman 400. The Wiseco Piston Kit gives you everything needed for a complete top-end...09030372- SKU:
- 09030372
- Availability:
- Ships Same Business Day
- Weight:
- 1.90 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE - OVERSIZE METRIC:
- +1.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 400 CC
- PISTON DIAMETER METRIC:
- 83.92 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE SIZE METRIC:
- 84.00 MM
- PRODUCT NAME:
- REBUILD KIT
$269.95Qty in Cart: 0Quantity:Price:$269.95Subtotal: -
Wiseco 86mm 10:1 Piston Kit for Honda TRX400EX 1999-2008 PK1033
WISECO
$294.95When your TRX400EX's piston shows signs of wear or you're pushing for higher RPMs, a quality rebuild is non-negotiable. The Wiseco 86mm 10:1 Piston Kit delivers the durability and precision needed to...09030374- SKU:
- 09030374
- Availability:
- Ships Same Business Day
- Weight:
- 2.00 LBS
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 70.00 MM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 86.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
- DISPLACEMENT:
- 397 CC
- PISTON DIAMETER METRIC:
- 85.95 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$294.95Qty in Cart: 0Quantity:Price:$294.95Subtotal: -
Wiseco Piston Kit for 1990-2006 Polaris Trail Blazer 250 PK1086
WISECO
$218.95If you're running a 1990-2006 Polaris Trail Blazer 250 at the edge of its limits, a worn top-end will cost you power and reliability. The Wiseco Piston Kit PK1086 delivers a complete engine rebuild...09030375- SKU:
- 09030375
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- TYPE:
- TOP END
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,00 MM
- DISPLACEMENT:
- 244 CC
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- BORE - OVERSIZE METRIC:
- +1.00 MM
- BORE SIZE METRIC:
- 73.00 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- RIDING STYLE:
- ATV
- SKIRT COATING:
- NON-COATED
- PISTON DIAMETER METRIC:
- 72.92 MM
- PRODUCT NAME:
- REBUILD KIT
- STROKE LENGTH METRIC:
- 60.00 MM
$218.95 -
Wiseco Piston Kit 83.50mm for 1994-2003 Polaris Sportsman 400 PK1108
WISECO
$239.95When your Polaris Sportsman 400's original pistons show signs of wear or you're rebuilding after a failure, a quality forged piston kit is non-negotiable for reliable performance. Wiseco's...09030376- SKU:
- 09030376
- Availability:
- Ships Same Business Day
- Weight:
- 1.82 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 83.50 MM
- TYPE:
- TOP END
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 70.00 MM
- PISTON DIAMETER METRIC:
- 83.42 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- DISPLACEMENT:
- 400 CC
- PRODUCT NAME:
- REBUILD KIT
- RIDING STYLE:
- ATV
$239.95Qty in Cart: 0Quantity:Price:$239.95Subtotal: -
Wiseco Piston Kit for Polaris Trail Boss 250 1987-1993 PK1085
WISECO
$218.95Top-end wear is inevitable on high-mileage 2-cycle engines, but premature piston failure doesn't have to be. This Wiseco piston kit for your Polaris Trail Boss 250 delivers OEM-quality replacement...09030377- SKU:
- 09030377
- Availability:
- Ships Same Business Day
- Weight:
- 1.22 LBS
- BORE - OVERSIZE:
- +0,50 MM
- DISPLACEMENT:
- 244 CC
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 72.42 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 72.50 MM
- ENGINE TYPE:
- 2-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 60.00 MM
$218.95 -
Wiseco Piston Kit Yamaha YFS200 Blaster 1988-2006 PK1089
WISECO
$225.95If you're rebuilding a 2-stroke YFS200 Blaster engine, piston quality directly impacts your top-end reliability and power output. Wiseco's high-silicone forged pistons deliver the thermal stability...09030378- SKU:
- 09030378
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 66.00 MM
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- PISTON DIAMETER METRIC:
- 65.95 MM
- STROKE LENGTH METRIC:
- 57.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 195 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$225.95 -
Wiseco Yamaha YFS200 Blaster 1988-2006 Piston Kit 67.50mm PK1095
WISECO
$219.95Stock pistons on your Yamaha Blaster won't survive sustained high-RPM riding or aggressive tuning—thermal stress and wear are inevitable. The Wiseco PK1095 eliminates these failure points with...09030379- SKU:
- 09030379
- Availability:
- Ships Same Business Day
- Weight:
- 1.20 LBS
- BORE - OVERSIZE METRIC:
- +1.50 MM
- PISTON DIAMETER METRIC:
- 67.50 MM
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE:
- +1,50 MM
- STROKE LENGTH METRIC:
- 57.00 MM
- UNITS:
- KIT
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 67.50 MM
- DISPLACEMENT:
- 195 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
$219.95Qty in Cart: 0Quantity:Price:$219.95Subtotal: -
Wiseco Piston Kit Yamaha YFS200 Blaster 1988-2006 66.50mm PK1091
WISECO
$230.95A complete piston kit rebuild is essential for restoring your YFS200 Blaster's compression, sealing, and reliability after high-mileage use or racing abuse. Wiseco's forged high-silicone construction...09030381- SKU:
- 09030381
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- SKIRT COATING:
- NON-COATED
- BORE - OVERSIZE METRIC:
- +0.50 MM
- BORE SIZE METRIC:
- 66.50 MM
- MODEL:
- PRO-LITE
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- +0,50 MM
- UNITS:
- KIT
- DISPLACEMENT:
- 195 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 66.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 57.00 MM
$230.95 -
Wiseco Piston Kit Standard Bore 93mm 10.6:1 Compression Polaris RZR XP 900 40045M09300
WISECO
$224.95The Wiseco Piston Kit is engineered for the RZR XP 900 to deliver consistent power and reliability under demanding conditions. Whether you're pushing hard on the track or exploring rough terrain,...09102818- SKU:
- 09102818
- Availability:
- Ships Same Business Day
- Weight:
- 1.10 LBS
- BORE SIZE METRIC:
- 93.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 64.50 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON
- SKIRT COATING:
- ARMORGLIDE®
- UNITS:
- EACH
- RIDING STYLE:
- UTV
- DISPLACEMENT:
- 876 CC
$224.95Qty in Cart: 0Quantity:Price:$224.95Subtotal: -
Wiseco Piston Kit Honda XR400R 1996-2004 85.50mm 10:1 Compression 4606M08550
WISECO
$210.95If you're running a Honda XR400R and want measurable gains in power delivery and reliability, a fresh piston kit is one of the most direct upgrades you can make. The Wiseco 4606M08550 delivers the...09102830- SKU:
- 09102830
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE - OVERSIZE:
- +0,50 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- DISPLACEMENT:
- 397 CC
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 70.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 85.50 MM
- COMPRESSION RATIO IMPERIAL:
- 10.0:1
$210.95Qty in Cart: 0Quantity:Price:$210.95Subtotal: -
Wiseco Piston Kit Standard Bore 90mm 9.5:1 Compression Honda TRX450 Foreman 4825M09000
WISECO
$194.95The TRX450 Foreman demands a piston that can handle sustained high RPM operation and varying terrain demands. This Wiseco piston kit delivers OEM-level precision with a 9.5:1 compression ratio that...09102833- SKU:
- 09102833
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- PISTON MATERIAL:
- FORGED
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 432 CC
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- BORE SIZE METRIC:
- 90.00 MM
$194.95Qty in Cart: 0Quantity:Price:$194.95Subtotal: -
Wiseco Piston Kit for Honda TRX450 Foreman 1998-2004 4825M09150
WISECO
$229.95When your TRX450 Foreman's stock piston starts losing compression or showing wear, power delivery suffers and reliability becomes questionable. This Wiseco piston kit restores—and actually...09102836- SKU:
- 09102836
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- BORE - OVERSIZE METRIC:
- +1.50 MM
- COMPRESSION RATIO IMPERIAL:
- 9.5:1
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE - OVERSIZE:
- +1,50 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 91.50 MM
- DISPLACEMENT:
- 432 CC
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$229.95 -
Wiseco Piston Kit 99mm 12.5:1 for 2004-2005 Honda TRX450R 4889M09900
WISECO
$309.95If you're running a TRX450R at the track or trail, your stock piston limits how much power your engine can safely produce. The Wiseco 99mm piston kit with 12.5:1 compression ratio unlocks measurable...09102839- SKU:
- 09102839
- Availability:
- Ships Same Business Day
- Weight:
- 1.25 LBS
- BORE - OVERSIZE METRIC:
- +4.00 MM
- DISPLACEMENT:
- 489 CC
- BORE - OVERSIZE:
- +4,00 MM
- BORE SIZE METRIC:
- 99.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- PRODUCT NAME:
- PISTON
- UNITS:
- EACH
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 64.80 MM
$309.95Qty in Cart: 0Quantity:Price:$309.95Subtotal: -
Wiseco Cam Chain for Honda TRX400X 2012-2014 CC004
WISECO
$82.95The stock cam chain on your Honda TRX400X will eventually stretch and wear, compromising valve timing and engine efficiency. The Wiseco CC004 replaces it with a precision-engineered "M" style chain...09250304- SKU:
- 09250304
- Availability:
- Ships Same Business Day
- Weight:
- 0.41 LBS
- CHAIN SIZE:
- 82RH2010
- PRODUCT NAME:
- CHAIN
- TYPE:
- CAM
- RIDING STYLE:
- OFF-ROAD
- NUMBER OF LINKS:
- 112
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$82.95 -
WISECO Cam Chain CC017
WISECO
$104.95A worn or inferior cam chain compromises valve timing precision, robbing your engine of power and reliability. The WISECO Cam Chain CC017 delivers OEM-exceeding durability through premium materials...09250317- SKU:
- 09250317
- Availability:
- Ships Same Business Day
- Weight:
- 0.52 LBS
- CHAIN SIZE:
- 98XRH2010
- TYPE:
- CAM
- PRODUCT NAME:
- CHAIN
- RIDING STYLE:
- UTV
- NUMBER OF LINKS:
- 126
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$104.95Qty in Cart: 0Quantity:Price:$104.95Subtotal:
