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
-
On Sale
MILLENNIUM Cylinder - +5mm - RZR 900 MT194
MILLENNIUM
MSRP: $999.95Now: $640.00Was: $999.95The MILLENNIUM Cylinder delivers measurable horsepower gains and extended engine life through advanced NSC plating and precision CNC machining. If you're running a RZR 900 and want maximum...09310702- SKU:
- 09310702
- Availability:
- Ships Same Business Day
- Weight:
- 5.90 LBS
- COMPRESSION RATIO IMPERIAL:
- 11.0:1
- MATERIAL:
- 6061 T6 ALUMINUM
- UNITS:
- KIT
- RIDING STYLE:
- UTV
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- OVERBORE METRIC:
- +5.00 MM
MSRP: $999.95Now: $640.00Was: $999.95 -
MILLENNIUM Cylinder Kit K289
MILLENNIUM
$1,495.00If you're serious about extracting maximum power and reliability from your engine, a proper big bore kit isn't optional—it's essential. The MILLENNIUM Cylinder Kit K289 delivers the displacement...09310703- SKU:
- 09310703
- Availability:
- Ships Same Business Day
- Weight:
- 10.20 LBS
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- BORE SIZE METRIC:
- 98.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- MATERIAL:
- 6061 BILLET ALUMINUM
- RIDING STYLE:
- UTV
$1,495.00 -
MILLENNIUM Cylinder - +5mm - RZR 1000 MT195
MILLENNIUM
$999.95If you're running a RZR 1000 at the edge of performance, your stock cylinder is holding you back. The MILLENNIUM Cylinder delivers the displacement increase and wear resistance your engine needs to...09310704- SKU:
- 09310704
- Availability:
- Ships Same Business Day
- Weight:
- 6.20 LBS
- UNITS:
- KIT
- MATERIAL:
- 6061 T6 ALUMINUM
- RIDING STYLE:
- UTV
- COMPRESSION RATIO IMPERIAL:
- 12.0:1
- OVERBORE METRIC:
- +5.00 MM
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
$999.95 -
MILLENNIUM Cylinder Kit K293
MILLENNIUM
$1,495.00When you're pushing your engine to the limit, a factory cylinder kit simply won't cut it. The MILLENNIUM K293 is a complete big bore solution engineered for racers and serious builders who demand...09310705- SKU:
- 09310705
- Availability:
- Ships Same Business Day
- Weight:
- 10.55 LBS
- MATERIAL:
- 6061 BILLET ALUMINUM
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- CYLINDER KIT
- STYLE:
- BIG BORE
- UNITS:
- KIT
- BORE SIZE METRIC:
- 85.00 MM
- RIDING STYLE:
- UTV
- COMPRESSION RATIO IMPERIAL:
- 10.75:1
$1,495.00 -
MOOSE RACING Motor Seals - Polaris 822261
MOOSE RACING
$19.31Engine gaskets and seals deteriorate over time, leading to oil leaks, compression loss, and costly collateral damage. The MOOSE RACING Motor Seals kit delivers a complete OEM-equivalent solution at a...09350383- SKU:
- 09350383
- Availability:
- Ships Same Business Day
- Weight:
- 0.13 LBS
- RIDING STYLE:
- ATV
- TYPE:
- OIL
- APPLICATION:
- ENGINE
- PRODUCT NAME:
- SEAL
- UNITS:
- SET
$19.31 -
MOOSE RACING Motor Seals - TRX500 822277
MOOSE RACING
$41.00Engine and transmission seals are critical to maintaining oil pressure, preventing leaks, and protecting internal components from contamination. OEM seals can be prohibitively expensive, but MOOSE...09350384- SKU:
- 09350384
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
$41.00Qty in Cart: 0Quantity:Price:$41.00Subtotal: -
MOOSE RACING Motor Seals - TRX450 822312
MOOSE RACING
$58.31Engine seal failures can compromise compression, cause oil leakage, and lead to catastrophic engine damage. MOOSE RACING Motor Seals deliver OEM-equivalent performance at a fraction of dealership...09350385- SKU:
- 09350385
- Availability:
- Ships Same Business Day
- Weight:
- 0.20 LBS
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- ATV
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
$58.31 -
MOOSE RACING Motor Seals - LTR 450 822327
MOOSE RACING
$38.21When rebuilding your LTR 450, you need seals you can trust—especially when OEM replacements come at premium prices. MOOSE Racing Motor Seals deliver genuine OEM-quality performance at a fraction of...09350386- SKU:
- 09350386
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- ATV
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- APPLICATION:
- ENGINE
- TYPE:
- OIL
$38.21 -
MOOSE RACING Motor Seals - KFX 450 822334
MOOSE RACING
$32.05Engine seal failures compromise performance and reliability—stopping you mid-race or leaving you stranded. MOOSE RACING Motor Seals deliver OEM-equivalent fitment at a fraction of OEM pricing,...09350387- SKU:
- 09350387
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- RIDING STYLE:
- ATV
- PRODUCT NAME:
- SEAL
- APPLICATION:
- ENGINE
- UNITS:
- SET
- TYPE:
- OIL
$32.05 -
MOOSE RACING Motor Seals - Outlaw 525 822335
MOOSE RACING
$44.10Engine rebuilds demand precision-fit seals that won't compromise reliability or drain your budget. MOOSE Racing Motor Seals deliver OEM-quality performance at a fraction of the cost, using high-tech...09350388- SKU:
- 09350388
- Availability:
- Ships Same Business Day
- Weight:
- 0.15 LBS
- APPLICATION:
- ENGINE
- TYPE:
- OIL
- UNITS:
- SET
- PRODUCT NAME:
- SEAL
- RIDING STYLE:
- ATV
$44.10 -
KIBBLEWHITE Intake Valve - Standard - Honda 30-30750T
KIBBLEWHITE
$92.51Kibblewhite's Tensilite® intake valves are engineered for engines that demand reliability under extreme conditions. Built from aerospace-grade titanium forgings and finished with a PVD coating, these...09262922- SKU:
- 09262922
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- MODEL:
- TENSILITE®
- STEM DIAMETER IMPERIAL:
- 0.2158'
- APPLICATION:
- INTAKE
- RIDING STYLE:
- ATV
- TULIP ANGLE:
- 20°
- UNITS:
- EACH
- HEAD DIAMETER METRIC:
- 36.00 MM
- PRODUCT NAME:
- VALVE
- MATERIAL:
- TITANIUM
$92.51 -
On Sale
Wossner Piston Kit Polaris 300 2x4 1994-1995 8095DA
WOSSNER
MSRP: $122.00Now: $115.90Was: $122.00A worn or damaged piston directly impacts engine efficiency, power delivery, and longevity—especially critical in 2-stroke applications where precision tolerances are unforgiving. The Wossner 8095DA...09105515- SKU:
- 09105515
- Availability:
- Ships Same Business Day
- Weight:
- 0.86 LBS
- BORE - OVERSIZE:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- ATV
- ENGINE TYPE:
- 2-STROKE
- PISTON SIZE METRIC:
- 74.43 MM
- PRODUCT NAME:
- PISTON KIT
- TYPE:
- DUAL RING
- BORE - OVERSIZE METRIC:
- STANDARD
- BORE SIZE METRIC:
- 74.50 MM
- MODEL:
- STANDARD SERIES
- UNITS:
- KIT
- DISPLACEMENT:
- 283 CC
MSRP: $122.00Now: $115.90Was: $122.00Qty in Cart: 0Quantity:Price:MSRP: $122.00Now: $115.90Was: $122.00Subtotal: -
On Sale
Wossner Piston Kit Yamaha YFZ350 Banshee 1987-2006 8075D150
WOSSNER
MSRP: $132.00Now: $125.40Was: $132.00The Wossner 8075D150 piston kit is engineered to restore or upgrade your YFZ350 Banshee with OEM-quality reliability and measurable performance gains. Whether you're rebuilding after wear or...09104795- SKU:
- 09104795
- Availability:
- Ships Same Business Day
- Weight:
- 0.70 LBS
- BORE - OVERSIZE METRIC:
- +1.50 MM
- MODEL:
- STANDARD SERIES
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- BORE SIZE METRIC:
- 65.50 MM
- DISPLACEMENT:
- 347 CC
- PISTON SIZE METRIC:
- 65.44 MM
- TYPE:
- DUAL RING
- PISTON MATERIAL:
- FORGED
- UNITS:
- KIT
- BORE - OVERSIZE:
- +1,50 MM
- DISPLACEMENT:
- 398 CC
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- RIDING STYLE:
- ATV
MSRP: $132.00Now: $125.40Was: $132.00Qty in Cart: 0Quantity:Price:MSRP: $132.00Now: $125.40Was: $132.00Subtotal: -
KIBBLEWHITE Exhaust Valve - Raptor 700 - 33mm 80-80434
KIBBLEWHITE
$37.55Your Raptor 700 demands valve components engineered to withstand extreme combustion pressures and temperature cycling without degradation. The KIBBLEWHITE Black Diamond™ exhaust valve delivers the...09260256- SKU:
- 09260256
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- HEAD DIAMETER METRIC:
- 33.00 MM
- MATERIAL:
- STAINLESS STEEL
- PRODUCT NAME:
- VALVE
- RIDING STYLE:
- ATV
- UNITS:
- EACH
- APPLICATION:
- EXHAUST
- MODEL:
- BLACK DIAMOND™
- STEM DIAMETER IMPERIAL:
- 0.2350'
- TULIP ANGLE:
- 25°
- LENGTH IMPERIAL:
- 3.770'
$37.55 -
MOOSE RACING Oil Filter DT-10-82
MOOSE RACING
$9.95Consistent oil filtration is non-negotiable for engine longevity and performance. The MOOSE RACING DT-10-82 delivers 10-micron filtration that captures contaminants while maintaining optimal oil...07120282- SKU:
- 07120282
- Availability:
- Ships Same Business Day
- Weight:
- 0.19 LBS
- RIDING STYLE:
- ATV
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- MICRON RATING:
- 10 MICRONS
- PRODUCT NAME:
- OIL FILTER
- STYLE:
- STANDARD
$9.95 -
PARTS UNLIMITED Oil Filter O-Rings - Bombardier - 5-Pack 420950860
PARTS UNLIMITED
$1.99Oil filter O-ring degradation is one of the most common causes of slow leaks and pressure loss in Bombardier 4 TEC engines. These OEM-specification replacements ensure a perfect seal at the filter...07120365- SKU:
- 07120365
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- COLOR/FINISH:
- BLACK
- RIDING STYLE:
- ATV
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- UTV
- TYPE:
- OIL FILTER
- UNITS:
- 5 PACK
- BASE COLOR:
- BLACK
- PRODUCT NAME:
- O-RING SET
- RIDING STYLE:
- WATERCRAFT
$1.99 -
PARTS UNLIMITED Oil Filter O-Rings - Bombardier - 5-Pack 420230920
PARTS UNLIMITED
$5.05Oil filter O-rings are a wear item that deteriorates with temperature cycles and age, potentially leading to seal failure and oil leaks. Replacing them during routine maintenance prevents...07120366- SKU:
- 07120366
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- BASE COLOR:
- RED
- PRODUCT NAME:
- O-RING SET
- RIDING STYLE:
- SNOW
- RIDING STYLE:
- WATERCRAFT
- TYPE:
- OIL FILTER
- UNITS:
- 5 PACK
- RIDING STYLE:
- ATV
- RIDING STYLE:
- UTV
- COLOR/FINISH:
- RED
$5.05 -
PARTS UNLIMITED Oil Filter 49065-2068
PARTS UNLIMITED
$11.17A quality oil filter is non-negotiable for engine longevity and performance—it's your first line of defense against contaminants that compromise bearing surfaces and fuel economy. The PARTS UNLIMITED...07120284- SKU:
- 07120284
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- EACH
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- TYPE:
- SPIN-ON
- BASE COLOR:
- BLACK
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
$11.17 -
PARTS UNLIMITED Oil Filter 15412-HP7-A01
PARTS UNLIMITED
$7.09Engine oil filtration directly impacts engine longevity and performance consistency—poor filtration accelerates wear on critical components and reduces power output. The PARTS UNLIMITED Pro Series...07120288- SKU:
- 07120288
- Availability:
- Ships Same Business Day
- Weight:
- 0.21 LBS
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- YELLOW
- UNITS:
- EACH
- COLOR/FINISH:
- YELLOW
- RIDING STYLE:
- UTV
- STYLE:
- STANDARD
- TYPE:
- CARTRIDGE
- FILTER MEDIA MATERIAL:
- PAPER
- RIDING STYLE:
- ATV
$7.09 -
PARTS UNLIMITED Oil Filter 15412-HM5-A10
PARTS UNLIMITED
$6.07Engine protection starts with filtration, and this Pro Series unit delivers OEM-grade or better performance using German paper media, English adhesives, and Japanese zinc steel construction. Clean...07120113- SKU:
- 07120113
- Availability:
- Ships Same Business Day
- Weight:
- 0.12 LBS
- COLOR/FINISH:
- YELLOW
- TYPE:
- CARTRIDGE
- UNITS:
- EACH
- RIDING STYLE:
- ATV
- FILTER MEDIA MATERIAL:
- PAPER
- PRODUCT NAME:
- OIL FILTER
- BASE COLOR:
- YELLOW
- STYLE:
- STANDARD
$6.07Qty in Cart: 0Quantity:Price:$6.07Subtotal:
