Dirt Bike Engine
Dirt Bike Engine Parts at JJ Motorsports
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance from JJ Motorsports. From crankshafts to cylinder heads and piston kits, these precision-engineered components ensure reliable performance. For additional upgrades, check out our full selection of off-road dirt bike parts to keep your engine running at peak efficiency on the track or trails.
Shop trusted brands like Wiseco for forged piston kits and K&N for high-flow oil filters. Explore related categories such as Dirt Bike Air and Fuel for intake upgrades or Dirt Bike Exhaust for complete systems.
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
VERTEX Piston Ring 53010004850
VERTEX
MSRP: $26.95Now: $24.26Was: $26.95Replacement piston rings, Nitride coated or chrome plated, increasing wear resistance and extending durability, The latest generation for both two-stroke and four-stroke engines; four-stroke piston rings are sold in sets and two-stroke piston rings are...09120168- SKU:
- 09120168
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 48.45 MM
MSRP: $26.95Now: $24.26Was: $26.95 -
On Sale
VERTEX Piston Ring 53010005400
VERTEX
MSRP: $30.95Now: $27.86Was: $30.95Replacement piston rings, Nitride coated or chrome plated, increasing wear resistance and extending durability, The latest generation for both two-stroke and four-stroke engines; four-stroke piston rings are sold in sets and two-stroke piston rings are...09120170- SKU:
- 09120170
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 53.96 MM
MSRP: $30.95Now: $27.86Was: $30.95 -
On Sale
VERTEX Piston Kit 23628A
VERTEX
MSRP: $177.95Now: $160.16Was: $177.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09102113- SKU:
- 09102113
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST BIG BORE
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 52.44 MM
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- BORE - OVERSIZE:
- +5,00 MM
- BORE - OVERSIZE METRIC:
- +5.00 MM
- CYLINDER DIAMETER METRIC:
- 52.50 MM
- DISPLACEMENT:
- 104 CC
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
MSRP: $177.95Now: $160.16Was: $177.95 -
On Sale
VERTEX Piston Kit 22996B
VERTEX
MSRP: $171.95Now: $154.76Was: $171.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09102127- SKU:
- 09102127
- Availability:
- Ships Same Business Day
- Weight:
- 0.45 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- PISTON DIAMETER METRIC:
- 53.93 MM
- STYLE:
- CAST RACE
MSRP: $171.95Now: $154.76Was: $171.95 -
On Sale
VERTEX Piston Kit 23404A
VERTEX
MSRP: $315.95Now: $284.36Was: $315.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101963- SKU:
- 09101963
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- BORE - OVERSIZE:
- +3,00 MM
- DISPLACEMENT:
- 480 CC
- ENGINE TYPE:
- 4-STROKE
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- PRODUCT NAME:
- PISTON KIT
- UNITS:
- KIT
- COMPRESSION RATIO IMPERIAL:
- 12.5:1
- CYLINDER DIAMETER METRIC:
- 98.00 MM
- PISTON DIAMETER METRIC:
- 97.96 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- STYLE:
- FORGED BIG BORE
- BORE - OVERSIZE METRIC:
- +3.00 MM
MSRP: $315.95Now: $284.36Was: $315.95Qty in Cart: 0Quantity:Price:MSRP: $315.95Now: $284.36Was: $315.95Subtotal: -
On Sale
VERTEX Piston Kit 22567A
VERTEX
MSRP: $262.95Now: $236.66Was: $262.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09101902- SKU:
- 09101902
- Availability:
- Ships Same Business Day
- Weight:
- 0.93 LBS
MSRP: $262.95Now: $236.66Was: $262.95 -
On Sale
VERTEX Piston Kit - Standard 22926B
VERTEX
MSRP: $230.95Now: $207.86Was: $230.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09100993- SKU:
- 09100993
- Availability:
- Ships Same Business Day
- Weight:
- 0.62 LBS
- CYLINDER DIAMETER METRIC:
- 64.00 MM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 200 CC
- PISTON DIAMETER METRIC:
- 63.95 MM
- PISTON MATERIAL:
- CAST
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- ENGINE TYPE:
- 2-STROKE
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- STYLE:
- CAST REPLICA
MSRP: $230.95Now: $207.86Was: $230.95Qty in Cart: 0Quantity:Price:MSRP: $230.95Now: $207.86Was: $230.95Subtotal: -
On Sale
VERTEX Piston Kit 24188C
VERTEX
MSRP: $148.45Now: $133.61Was: $148.45All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Forged pistons are forged from 2618 aluminum for...09104664- SKU:
- 09104664
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- DISPLACEMENT:
- 450 CC
- PISTON DIAMETER METRIC:
- 95.98 MM
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- 14.4:1
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
MSRP: $148.45Now: $133.61Was: $148.45Qty in Cart: 0Quantity:Price:MSRP: $148.45Now: $133.61Was: $148.45Subtotal: -
On Sale
VERTEX Piston Kit 24268A
VERTEX
MSRP: $236.95Now: $213.26Was: $236.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09105178- SKU:
- 09105178
- Availability:
- Ships Same Business Day
- Weight:
- 0.55 LBS
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- 14.3:1
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 76.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 250 CC
MSRP: $236.95Now: $213.26Was: $236.95Qty in Cart: 0Quantity:Price:MSRP: $236.95Now: $213.26Was: $236.95Subtotal: -
On Sale
VERTEX Piston Kit 24269A
VERTEX
MSRP: $324.95Now: $292.46Was: $324.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09105182- SKU:
- 09105182
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
- DISPLACEMENT:
- 250 CC
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 76.95 MM
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- PRODUCT NAME:
- PISTON KIT
- STYLE:
- GP RACER'S CHOICE
- COMPRESSION RATIO IMPERIAL:
- 13.9:1
- CYLINDER DIAMETER METRIC:
- 77.00 MM
- ENGINE TYPE:
- 4-STROKE
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
MSRP: $324.95Now: $292.46Was: $324.95Qty in Cart: 0Quantity:Price:MSRP: $324.95Now: $292.46Was: $324.95Subtotal: -
On Sale
VERTEX Piston Kit 24270A
VERTEX
MSRP: $254.95Now: $229.46Was: $254.95All pistons are heat treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life, Cast piston kits are gravity cast aluminum alloy (not...09105191- SKU:
- 09105191
- Availability:
- Ships Same Business Day
- Weight:
- 0.90 LBS
MSRP: $254.95Now: $229.46Was: $254.95Qty in Cart: 0Quantity:Price:MSRP: $254.95Now: $229.46Was: $254.95Subtotal: -
On Sale
VERTEX Piston Kit - High Compression VTKTC23113A
VERTEX
MSRP: $307.95Now: $277.16Was: $307.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09103736- SKU:
- 09103736
- Availability:
- Ships Same Business Day
- Weight:
- 1.65 LBS
MSRP: $307.95Now: $277.16Was: $307.95Qty in Cart: 0Quantity:Price:MSRP: $307.95Now: $277.16Was: $307.95Subtotal: -
On Sale
VERTEX Piston Kit VTKTC23235A
VERTEX
MSRP: $325.95Now: $293.36Was: $325.95All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09103742- SKU:
- 09103742
- Availability:
- Ships Same Business Day
- Weight:
- 2.05 LBS
MSRP: $325.95Now: $293.36Was: $325.95Qty in Cart: 0Quantity:Price:MSRP: $325.95Now: $293.36Was: $325.95Subtotal: -
On Sale
VERTEX Piston Kit 23737C
VERTEX
MSRP: $151.53Now: $136.38Was: $151.53All pistons are heat-treated with a T-5 hardening and tempering cycle, All piston skirts are coated with a high-tech Molybdenum Disulphite coating for faster break-in time and increased piston life09102619- SKU:
- 09102619
- Availability:
- Ships Same Business Day
- Weight:
- 0.96 LBS
- CYLINDER DIAMETER METRIC:
- 96.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED 2618 ALUMINUM
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- COMPRESSION RATIO IMPERIAL:
- 13.8:1
- PISTON DIAMETER METRIC:
- 95.97 MM
- PRODUCT NAME:
- PISTON KIT
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- FORGED HIGH COMPRESSION
- UNITS:
- KIT
MSRP: $151.53Now: $136.38Was: $151.53Qty in Cart: 0Quantity:Price:MSRP: $151.53Now: $136.38Was: $151.53Subtotal: -
On Sale
Wiseco Wrist Pin 2000-2005 Yamaha YZ250 S376
WISECO
MSRP: $22.99Now: $20.00Was: $22.99Elevate your engine's performance with the Wiseco S376 piston, meticulously engineered for peak reliability and efficiency. This advanced piston is designed to thrive under the most demanding conditions, ensuring your ride delivers unmatched power and...S376- SKU:
- S376
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- LENGTH:
- 57 MM
- OUTSIDE DIAMETER:
- 19,00 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- STREET
- APPLICATION:
- PISTON
- LENGTH METRIC:
- 57 MM
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER METRIC:
- 19.00 MM
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
MSRP: $22.99Now: $20.00Was: $22.99Qty in Cart: 0Quantity:Price:MSRP: $22.99Now: $20.00Was: $22.99Subtotal: -
On Sale
Wiseco Wrist Pin Honda CB350F 1972-1973 S522
WISECO
MSRP: $23.99Now: $20.00Was: $23.99Unlock the full potential of your engine with the Wiseco S522 High-Performance Piston. Crafted for enthusiasts and racers alike, this piston combines cutting-edge technology with exceptional durability to deliver unmatched performance under pressure. ...S522- SKU:
- S522
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- LENGTH METRIC:
- 57.8 MM
- MATERIAL:
- ALUMINUM
- RIDING STYLE:
- ATV
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- OUTSIDE DIAMETER:
- 15,00 MM
- RIDING STYLE:
- OFF-ROAD
- LENGTH:
- 57,8 MM
- OUTSIDE DIAMETER METRIC:
- 15.00 MM
- PRODUCT NAME:
- WRIST PIN
- UNITS:
- EACH
MSRP: $23.99Now: $20.00Was: $23.99 -
On Sale
Wiseco 2-Stroke Piston Kit 58mm Standard Bore for 2016-2017 KTM 150 SX RE909M05800
WISECO
MSRP: $204.95Now: $174.00Was: $204.95Experience unparalleled performance with the WISECO Racer Elite Piston Kit, engineered for 2-stroke engines. Crafted from advanced 2000 Series alloy, this piston delivers exceptional strength and durability, ensuring optimal operation in the most...09105103- SKU:
- 09105103
- Availability:
- Ships Same Business Day
- Weight:
- 0.51 LBS
- BORE SIZE METRIC:
- 58.00 MM
- BORE - OVERSIZE:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON KIT
- SKIRT COATING:
- ARMORFIT™
- BORE - OVERSIZE METRIC:
- STANDARD
- PISTON MATERIAL:
- 2000 SERIES ALLOY
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- RACER ELITE
- UNITS:
- KIT
- PISTON MATERIAL:
- FORGED
MSRP: $204.95Now: $174.00Was: $204.95 -
On Sale
Wiseco Piston Kit with Gaskets for Kawasaki KX100 1998-2013 PK1154
WISECO
MSRP: $174.95Now: $149.00Was: $174.95Experience the pinnacle of performance with the WISECO Piston Kit, expertly designed for 2-cycle engines. Crafted from high-silicone bar stock, these forged pistons offer superior strength and reduced thermal expansion, ensuring optimal engine efficiency...09030310- SKU:
- 09030310
- Availability:
- Ships Same Business Day
- Weight:
- 0.65 LBS
- BORE SIZE METRIC:
- 52.50 MM
- PRODUCT NAME:
- REBUILD KIT
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- DISPLACEMENT:
- 99 CC
- ENGINE TYPE:
- 2-STROKE
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- PISTON DIAMETER METRIC:
- 52.45 MM
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- STROKE LENGTH METRIC:
- 45.80 MM
- MODEL:
- PRO-LITE
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- TOP END
MSRP: $174.95Now: $149.00Was: $174.95 -
On Sale
Wiseco Piston Kit with Gasket for Yamaha YZ250F 2012-2013 PK1902
WISECO
MSRP: $309.95Now: $263.00Was: $309.95Elevate your engine's performance with the WISECO Piston Kit, meticulously crafted for Yamaha models. This comprehensive kit includes everything you need for a complete rebuild, ensuring optimal strength and efficiency under extreme conditions. ...09031146- SKU:
- 09031146
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- REBUILD KIT
- TYPE:
- TOP END
- BORE - OVERSIZE:
- STANDARD
- BORE - OVERSIZE METRIC:
- STANDARD
- COMPRESSION RATIO IMPERIAL:
- 13.5:1
- ENGINE TYPE:
- 4-STROKE
- PISTON DIAMETER METRIC:
- 76.95 MM
- PISTON MATERIAL:
- 2618 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- SKIRT COATING:
- NON-COATED
- UNITS:
- KIT
- BORE SIZE METRIC:
- 77.00 MM
- MODEL:
- FORGED SERIES
- STROKE LENGTH METRIC:
- 53.60 MM
MSRP: $309.95Now: $263.00Was: $309.95Qty in Cart: 0Quantity:Price:MSRP: $309.95Now: $263.00Was: $309.95Subtotal: -
On Sale
Wiseco Top End Bearing Kawasaki KDX200 1986-2006 B1008
WISECO
MSRP: $23.99Now: $20.00Was: $23.99Engineered for peak performance, the WISECO Top End Bearing B1008 is crafted from a high-silicon aluminum alloy, ensuring exceptional strength and reliability. These premium bearings are precision-manufactured to meet stringent standards, providing...B1008- SKU:
- B1008
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- TYPE:
- TOP END
- APPLICATION:
- PISTON
- MATERIAL:
- SILICONE
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- BEARING
- UNITS:
- EACH
- INSIDE DIAMETER METRIC:
- 18 MM
- LENGTH METRIC:
- 22 MM
- MATERIAL:
- ALUMINUM
- OUTSIDE DIAMETER METRIC:
- 22 MM
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- RIDING STYLE:
- SNOW
MSRP: $23.99Now: $20.00Was: $23.99
