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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COMETIC Gasket Set - YFZ350 C7275
COMETIC
$40.95A quality gasket set is non-negotiable for top-end rebuilds on high-output engines—improper sealing leads to compression loss, oil weeping, and catastrophic failures. The COMETIC C7275 delivers the...C7275- SKU:
- C7275
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- BORE SIZE METRIC:
- 66.50 MM
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$40.95 -
COMETIC Gasket Set - TRX200 C7222
COMETIC
$31.95A quality gasket set is foundational to reliable engine sealing and peak performance—especially when running elevated boost or naturally aspirated high-horsepower builds. The COMETIC C7222 is...C7222- SKU:
- C7222
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- THICKNESS IMPERIAL:
- 0,012'
- THICKNESS METRIC:
- 0.31 MM
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 67.00 MM
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$31.95 -
COMETIC Top End Gasket Set - Yamaha C7096
COMETIC
$36.95A quality top-end gasket set is critical to maintaining compression and preventing coolant or oil seepage—especially when you're running high boost or pushing naturally aspirated limits. The COMETIC...C7096- SKU:
- C7096
- Availability:
- Ships Same Business Day
- Weight:
- 0.08 LBS
- BORE SIZE METRIC:
- 84.00 MM
- UNITS:
- KIT
- TYPE:
- TOP END
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
$36.95Qty in Cart: 0Quantity:Price:$36.95Subtotal: -
COMETIC Top End Gasket Set - Yamaha C7094
COMETIC
$40.95A quality top-end gasket set is critical to maintaining cylinder pressure and preventing coolant or oil seepage that compromises performance and reliability. The COMETIC C7094 is engineered...C7094- SKU:
- C7094
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- GASKET KIT
- RIDING STYLE:
- ATV
- BORE SIZE METRIC:
- 65.50 MM
- TYPE:
- TOP END
- UNITS:
- KIT
$40.95Qty in Cart: 0Quantity:Price:$40.95Subtotal: -
COMETIC Top End Gasket Set - Suzuki C7071
COMETIC
$47.95A failing top-end gasket will compromise combustion sealing and cost you horsepower—or worse, leave you stranded. The COMETIC C7071 gasket set eliminates guesswork with factory-correct fitment and...C7071- SKU:
- C7071
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- PRODUCT NAME:
- GASKET KIT
- TYPE:
- TOP END
- BORE SIZE METRIC:
- 69.00 MM
- RIDING STYLE:
- ATV
- UNITS:
- KIT
$47.95 -
Wiseco Piston +1.00 mm Yamaha Banshee 350 4x2 1987-2006 795M06500
WISECO
$171.95If you're serious about extracting maximum performance from your Yamaha Banshee 350, you need a piston engineered to handle the demands of competitive racing and high-rpm abuse. The Wiseco +1.00 mm...795M06500- SKU:
- 795M06500
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- STROKE LENGTH:
- 54,00 MM
- BORE - OVERSIZE:
- +1,00 MM
- BORE - OVERSIZE METRIC:
- +1.00 MM
- STROKE LENGTH METRIC:
- 54.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 65.00 MM
- DISPLACEMENT:
- 358 CC
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$171.95 -
Wiseco Yamaha YFZ350 Banshee 1987-2006 64.50mm Piston Kit 795M06450
WISECO
$171.95Whether you're rebuilding a tired YFZ350 or pushing your Banshee to its limit, a quality piston is non-negotiable for reliable power delivery and longevity. The Wiseco 795M06450 is engineered with...795M06450- SKU:
- 795M06450
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 64.50 MM
- DISPLACEMENT:
- 352 CC
- STROKE LENGTH METRIC:
- 54.00 MM
- BORE - OVERSIZE METRIC:
- +0.50 MM
- MODEL:
- RACER'S CHOICE
- BORE - OVERSIZE:
- +0,50 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- ATV
- UNITS:
- EACH
$171.95 -
Wiseco Piston Kit 74mm Oversize for Polaris Trail Blazer 1990-2006 536M07400
WISECO
$174.95If you're running a Polaris Trail Blazer and want measurable gains in power and durability, a proper piston upgrade is non-negotiable. The Wiseco 74mm oversize kit delivers the compression ratio and...536M07400- SKU:
- 536M07400
- Availability:
- Ships Same Business Day
- Weight:
- 0.74 LBS
- PISTON MATERIAL:
- FORGED
- BORE - OVERSIZE:
- +2,00 MM
- BORE SIZE METRIC:
- 74.00 MM
- PRODUCT NAME:
- PISTON
- DISPLACEMENT:
- 244 CC
- STROKE LENGTH METRIC:
- 60.00 MM
- BORE - OVERSIZE METRIC:
- +2.00 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
- STROKE LENGTH:
- 60,00 MM
- UNITS:
- EACH
$174.95Qty in Cart: 0Quantity:Price:$174.95Subtotal: -
K&S TECHNOLOGIES Oil Seal Kit - Polaris 50-5003
K&S TECHNOLOGIES
$21.95Oil seal failure is one of the most common causes of premature engine damage in Polaris units, leading to fluid leakage, contamination, and catastrophic bearing wear. The K&S Technologies Oil Seal...505003- SKU:
- 505003
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- RIDING STYLE:
- ATV
- UNITS:
- KIT
- PRODUCT NAME:
- SEAL KIT
$21.95 -
K&S TECHNOLOGIES Oil Seal Kit - YFZ350 50-4002
K&S TECHNOLOGIES
$77.95Oil seal degradation is one of the most common causes of fluid leakage and premature wear in high-performance engines. The K&S Technologies Oil Seal Kit for YFZ350 delivers direct OEM-equivalent...504002- SKU:
- 504002
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
- PRODUCT NAME:
- SEAL KIT
- TYPE:
- OIL
- UNITS:
- KIT
- RIDING STYLE:
- ATV
- APPLICATION:
- ENGINE
$77.95 -
Wiseco 85mm 11:1 Piston Kit for Honda TRX400X 2009-2014 4628M08500
WISECO
$238.95When you're pushing your TRX400X to its limits on the track or trail, your factory piston won't cut it. The Wiseco 85mm 11:1 kit delivers the compression ratio and material science you need to...4628M08500- SKU:
- 4628M08500
- Availability:
- Ships Same Business Day
- Weight:
- 0.98 LBS
- BORE SIZE METRIC:
- 85.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE - OVERSIZE:
- STANDARD
- DISPLACEMENT:
- 397 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- STROKE LENGTH METRIC:
- 70.00 MM
- MODEL:
- FORGED SERIES
- PISTON DIAMETER METRIC:
- 84.95 MM
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
$238.95 -
Wiseco Piston Honda CRF450R 2002-2008 4393M08200
WISECO
$212.95The Wiseco Piston for Honda CRF450R 2002-2008 is engineered to deliver reliable power and durability in both high-RPM racing and demanding trail conditions. Built from high-silicon alloy, it...4393M08200- SKU:
- 4393M08200
- Availability:
- Ships Same Business Day
- Weight:
- 1.00 LBS
- BORE - OVERSIZE METRIC:
- +1.00 MM
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
- STROKE LENGTH METRIC:
- 68.00 MM
- BORE - OVERSIZE:
- +1,00 MM
- PISTON DIAMETER METRIC:
- 81.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE SIZE METRIC:
- 82.00 MM
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- DISPLACEMENT:
- 350.4 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$212.95Qty in Cart: 0Quantity:Price:$212.95Subtotal: -
Wiseco Piston Kit Honda CRF450R 2002-2008 12.01:1 Compression 4362M06500
WISECO
$177.95When your CRF450R demands peak performance, piston quality directly determines engine reliability and horsepower delivery. Wiseco's high-silicon alloy construction withstands the extreme combustion...4362M06500- SKU:
- 4362M06500
- Availability:
- Ships Same Business Day
- Weight:
- 0.56 LBS
- COMPRESSION RATIO IMPERIAL:
- 10.25:1
- STROKE LENGTH METRIC:
- 57.80 MM
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 191.8 CC
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- BORE SIZE METRIC:
- 65.00 MM
- PISTON DIAMETER METRIC:
- 64.95 MM
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 4-STROKE
- MODEL:
- FORGED SERIES
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- NON-COATED
$177.95 -
HOT RODS Connecting Rod 8121
HOT RODS
$151.95A connecting rod is the critical link between your piston and crankshaft—it must withstand extreme forces, heat cycling, and RPM loads without flex or failure. The HOT RODS 8121 is engineered for...427306- SKU:
- 427306
- Availability:
- Ships Same Business Day
- Weight:
- 0.88 LBS
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
- SIZE METRIC:
- STANDARD
- UNITS:
- KIT
$151.95 -
HOT RODS Connecting Rod 8164
HOT RODS
$225.95High-RPM engine builds demand connecting rods engineered to handle sustained power and stress without compromise. The HOT RODS 8164 delivers the durability and precision of a purpose-built race...425504- SKU:
- 425504
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- ENGINE TYPE:
- 2-CYCLE
- FEATURES:
- INCLUDES THRUST WASHERS
- UNITS:
- KIT
- MATERIAL:
- 8620 STEEL
- PRODUCT NAME:
- CONNECTING ROD KIT
- RIDING STYLE:
- ATV
$225.95 -
On Sale
ATHENA Complete Gasket Kit - Suzuki P400510850260
ATHENA
MSRP: $35.95Now: $31.00Was: $35.95A complete gasket kit is essential for any top-end or full engine rebuild—poor gasket quality leads to compression loss, oil seepage, and catastrophic failure under racing conditions. The ATHENA...400510850260- SKU:
- 400510850260
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $35.95Now: $31.00Was: $35.95 -
On Sale
ATHENA Top End Gasket Kit - Suzuki P400510600260
ATHENA
MSRP: $25.95Now: $23.00Was: $25.95Whether you're prepping for race season or executing a midseason engine refresh, the ATHENA Top End Gasket Kit delivers the precision sealing your engine demands. This kit gives you the flexibility...400510600260- SKU:
- 400510600260
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
MSRP: $25.95Now: $23.00Was: $25.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850351/1
ATHENA
MSRP: $60.95Now: $52.00Was: $60.95A complete top-end rebuild demands gaskets engineered to withstand extreme combustion pressures and temperature cycling without degradation or leakage. Athena's gasket kit delivers OEM-equivalent...400485850351- SKU:
- 400485850351
- Availability:
- Ships Same Business Day
- Weight:
- 0.31 LBS
MSRP: $60.95Now: $52.00Was: $60.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850263
ATHENA
MSRP: $56.95Now: $49.00Was: $56.95When rebuilding or refreshing your engine, gasket failure isn't an option—it compromises compression, causes leaks, and sidelines your bike. The ATHENA Complete Gasket Kit delivers OEM-quality...400485850263- SKU:
- 400485850263
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
MSRP: $56.95Now: $49.00Was: $56.95 -
On Sale
ATHENA Complete Gasket Kit - Yamaha P400485850225
ATHENA
MSRP: $78.95Now: $67.00Was: $78.95Engine gasket failure is one of the fastest routes to catastrophic damage, and factory gaskets often fall short under sustained performance conditions. The ATHENA Complete Gasket Kit eliminates...400485850225- SKU:
- 400485850225
- Availability:
- Ships Same Business Day
- Weight:
- 0.38 LBS
MSRP: $78.95Now: $67.00Was: $78.95
