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
-
VERTEX Piston Kit VTK23375B-1
VERTEX
$280.95All 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 life09103107- SKU:
- 09103107
- Availability:
- Ships Same Business Day
- Weight:
- 1.30 LBS
- PISTON DIAMETER METRIC:
- 71.95 MM
- PRODUCT NAME:
- TOP END PISTON KIT
- RIDING STYLE:
- STREET
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 72.00 MM
- DISPLACEMENT:
- 300 CC
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- STYLE:
- CAST REPLICA
$280.95 -
VERTEX Piston Kit VTK22877B
VERTEX
$152.95All 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 life09103123- SKU:
- 09103123
- Availability:
- Ships Same Business Day
- Weight:
- 0.80 LBS
- DISPLACEMENT:
- 85 CC
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- CYLINDER DIAMETER METRIC:
- 48.00 MM
- PISTON DIAMETER METRIC:
- 47.95 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- PISTON MATERIAL:
- CAST
- PRODUCT NAME:
- TOP END PISTON KIT
$152.95 -
VERTEX Piston Kit VTK23119B
VERTEX
$186.95All 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 life09103133- SKU:
- 09103133
- Availability:
- Ships Same Business Day
- Weight:
- 0.95 LBS
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- ENGINE TYPE:
- 2-STROKE
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- PISTON DIAMETER METRIC:
- 53.94 MM
- PISTON MATERIAL:
- ALUMINUM ALLOY
- PISTON MATERIAL:
- CAST
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 54.00 MM
- DISPLACEMENT:
- 125 CC
- PRODUCT NAME:
- TOP END PISTON KIT
$186.95 -
VERTEX Piston Circlips - KX/RM/SX65/85 72065K
VERTEX
$3.95OEM Replacements for Vertex piston kits.09130058- SKU:
- 09130058
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- PAIR
- PRODUCT NAME:
- CIRCLIP
$3.95 -
VERTEX Piston Ring 50420004800
VERTEX
$240.45Replacement ring set for Vertex piston kit09120842- SKU:
- 09120842
- Availability:
- Ships Same Business Day
- Weight:
- 0.11 LBS
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$240.45 -
VERTEX Wrist Pin 711195
VERTEX
$49.95Case hardened wrist pins utilize nitride coatings that produce a high performance, wear resistant wrist pin., Coating wrist pins with a nitride coating is advantageous because it allows the desired surface hardness to be obtained without quenching and...09120470- SKU:
- 09120470
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- WRIST PIN
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
$49.95 -
VERTEX Piston Ring 590296000003
VERTEX
$74.95Replacement Piston Rings09120342- SKU:
- 09120342
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
$74.95 -
VERTEX Piston Ring 53010005250
VERTEX
$25.95Replacement 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...09120343- SKU:
- 09120343
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PISTON SIZE METRIC:
- +2.00 MM
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 52.44 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$25.95 -
VERTEX Piston Ring 53010005300
VERTEX
$25.95Replacement 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...09120344- SKU:
- 09120344
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 65.97 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
$25.95 -
VERTEX Piston Ring 55910006640
VERTEX
$48.95Replacement 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...09120347- SKU:
- 09120347
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- PISTON DIAMETER METRIC:
- 66.35 MM
$48.95 -
VERTEX Piston Ring 590288000001
VERTEX
$76.95Replacement 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...09120348- SKU:
- 09120348
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 87.96 MM
- RIDING STYLE:
- STREET
- UNITS:
- SET
$76.95 -
VERTEX Piston Ring 590210000001
VERTEX
$76.95Replacement 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...09120297- SKU:
- 09120297
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- PISTON DIAMETER METRIC:
- 88.95 MM
- RIDING STYLE:
- OFF-ROAD
- RIDING STYLE:
- ATV
$76.95 -
VERTEX Piston Ring 590298000001
VERTEX
$74.95Replacement 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...09120313- SKU:
- 09120313
- Availability:
- Ships Same Business Day
- Weight:
- 0.07 LBS
- PISTON DIAMETER METRIC:
- 97.96 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- ATV
- RIDING STYLE:
- OFF-ROAD
$74.95 -
VERTEX Piston Ring 590310200002
VERTEX
$76.95Replacement 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...09120315- SKU:
- 09120315
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON DIAMETER METRIC:
- 101.96 MM
- RIDING STYLE:
- UTV
- UNITS:
- SET
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
$76.95 -
VERTEX Piston Ring 53009804700
VERTEX
$25.95Replacement 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...09120163- SKU:
- 09120163
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON RING
- PISTON DIAMETER METRIC:
- 46.95 MM
$25.95 -
VERTEX Piston Ring 53010004450
VERTEX
$23.95Replacement 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...09120164- SKU:
- 09120164
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- PISTON DIAMETER METRIC:
- 44.45 MM
- UNITS:
- EACH
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
$23.95 -
VERTEX Piston Ring 53010004500
VERTEX
$24.95Replacement 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...09120165- SKU:
- 09120165
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- OFF-ROAD
- PISTON DIAMETER METRIC:
- 44.97 MM
- PRODUCT NAME:
- PISTON RING
- UNITS:
- EACH
$24.95 -
VERTEX Piston Ring 53010005200
VERTEX
$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...09120169- SKU:
- 09120169
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PISTON DIAMETER METRIC:
- 51.95 MM
- UNITS:
- EACH
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
$26.95 -
VERTEX Piston Kit 22501B
VERTEX
$127.95All 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...09102075- SKU:
- 09102075
- Availability:
- Ships Same Business Day
- Weight:
- 0.36 LBS
- DISPLACEMENT:
- 80 CC
- PISTON MATERIAL:
- CAST
- UNITS:
- KIT
- CYLINDER DIAMETER METRIC:
- 47.50 MM
- ENGINE TYPE:
- 2-STROKE
- PISTON DIAMETER METRIC:
- 47.44 MM
- PRODUCT NAME:
- PISTON KIT
- COMPRESSION RATIO IMPERIAL:
- STANDARD
- RIDING STYLE:
- OFF-ROAD
- STYLE:
- CAST REPLICA
- PISTON MATERIAL:
- ALUMINUM ALLOY
- SKIRT COATING:
- MOLYBDENUM DISULPHITE
$127.95 -
VERTEX Piston Kit 22983A
VERTEX
$224.95All 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 life09101747- SKU:
- 09101747
- Availability:
- Ships Same Business Day
- Weight:
- 0.50 LBS
$224.95
