Dirt Bike Engine
Explore our selection for dirt bike parts for adding horsepower or reliability to a dirt bike's engine. We feature engine parts from Wiseco, Vertex, and more common engine part manufacturers. Get new pistons and gasket kits for re-freshening engines to withstand any conditions you put your bike through!
- Dirt Bike Cams and Parts
- Dirt Bike Connecting Rods and Parts
- Dirt Bike Crankcases and Parts
- Dirt Bike Crankshafts and Parts
- Dirt Bike Cylinder Heads and Parts
- Dirt Bike Cylinders and Parts
- Dirt Bike Engine Bearings
- Dirt Bike Engine Covers
- Dirt Bike Engine Gaskets and Kits
- Dirt Bike Engine Rebuild Kits
- Dirt Bike Engine Seals - Orings and Kits
- Dirt Bike Engine Valves and Parts
- Dirt Bike Flywheel and Rod Assemblies
- Dirt Bike Fuel Filters
- Dirt Bike Miscellaneous Engine Parts
- Dirt Bike Oil Coolers
- Dirt Bike Oil Filters
- Dirt Bike Oil Lines
- Dirt Bike Oil Pumps
- Dirt Bike Piston and Ring Kits
- Dirt Bike Piston Rings Only
- Dirt Bike Wrist Pins and Circlips
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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ATHENA Piston Ring Set S41316089
ATHENA
MSRP: $39.95Now: $35.96Was: $39.95ATHENA Piston Ring Set S41316089Replacement rings for Athena Forged Pistons9120281- SKU:
- 9120281
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- BORE SIZE METRIC:
- 82.00 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED
MSRP: $39.95Now: $35.96Was: $39.95 -
ATHENA Piston Ring Set S41316134
ATHENA
MSRP: $34.95Now: $31.46Was: $34.95Replacement rings for Athena Forged Pistons9120282- SKU:
- 9120282
- Weight:
- 0.10 LBS
MSRP: $34.95Now: $31.46Was: $34.95Qty in Cart: 0Quantity:Price:MSRP: $34.95Now: $31.46Was: $34.95Subtotal: -
ATHENA Piston Ring Set S41316154
ATHENA
MSRP: $30.95Now: $27.86Was: $30.95ATHENA Piston Ring Set S41316154Replacement rings for Athena Forged Pistons9120284- SKU:
- 9120284
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 48.45 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED
- UNITS:
- SET
MSRP: $30.95Now: $27.86Was: $30.95Qty in Cart: 0Quantity:Price:MSRP: $30.95Now: $27.86Was: $30.95Subtotal: -
ATHENA Piston Ring Set S41316278
ATHENA
MSRP: $55.95Now: $50.36Was: $55.95ATHENA Piston Ring Set S41316278Replacement rings for Athena Forged Pistons9120471- SKU:
- 9120471
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 82.00 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- ENGINE TYPE:
- 4-STROKE
- UNITS:
- SET
MSRP: $55.95Now: $50.36Was: $55.95Qty in Cart: 0Quantity:Price:MSRP: $55.95Now: $50.36Was: $55.95Subtotal: -
ATHENA Ring Set S41316181
ATHENA
MSRP: $55.95Now: $50.36Was: $55.95ATHENA Ring Set S41316181Replacement rings for Athena Forged Pistons9120331- SKU:
- 9120331
- Availability:
- Ships Same Business Day
- Weight:
- 0.02 LBS
- BORE SIZE METRIC:
- 68.96 MM
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- ENGINE TYPE:
- 4-STROKE
MSRP: $55.95Now: $50.36Was: $55.95 -
ATHENA Piston Ring Set S41316173
ATHENA
MSRP: $33.95Now: $30.56Was: $33.95ATHENA Piston Ring Set S41316173Replacement rings for Athena Forged Pistons9120592- SKU:
- 9120592
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 76.95 MM
- UNITS:
- SET
MSRP: $33.95Now: $30.56Was: $33.95Qty in Cart: 0Quantity:Price:MSRP: $33.95Now: $30.56Was: $33.95Subtotal: -
ATHENA Piston Ring Set S41316185
ATHENA
MSRP: $39.95Now: $35.96Was: $39.95Replacement rings for Athena Forged Pistons9120593- SKU:
- 9120593
- Weight:
- 0.10 LBS
MSRP: $39.95Now: $35.96Was: $39.95Qty in Cart: 0Quantity:Price:MSRP: $39.95Now: $35.96Was: $39.95Subtotal: -
ATHENA Piston Ring Set S41316214
ATHENA
MSRP: $43.95Now: $39.56Was: $43.95Replacement rings for Athena Forged Pistons9120594- SKU:
- 9120594
- Weight:
- 1.00 LBS
MSRP: $43.95Now: $39.56Was: $43.95Qty in Cart: 0Quantity:Price:MSRP: $43.95Now: $39.56Was: $43.95Subtotal: -
ATHENA Piston Ring Set S41316219
ATHENA
MSRP: $32.95Now: $29.66Was: $32.95Replacement rings for Athena Forged Pistons9120595- SKU:
- 9120595
- Weight:
- 1.00 LBS
MSRP: $32.95Now: $29.66Was: $32.95Qty in Cart: 0Quantity:Price:MSRP: $32.95Now: $29.66Was: $32.95Subtotal: -
ATHENA Piston Ring Set S41316273
ATHENA
MSRP: $42.95Now: $38.66Was: $42.95Replacement rings for Athena Forged Pistons9120596- SKU:
- 9120596
- Weight:
- 1.00 LBS
MSRP: $42.95Now: $38.66Was: $42.95Qty in Cart: 0Quantity:Price:MSRP: $42.95Now: $38.66Was: $42.95Subtotal: -
ATHENA Piston Ring Set - Kawasaki KX85 S41316299
ATHENA
MSRP: $15.95Now: $14.36Was: $15.95Replacement rings for Athena Forged Pistons9120667- SKU:
- 9120667
- Weight:
- 0.10 LBS
MSRP: $15.95Now: $14.36Was: $15.95Qty in Cart: 0Quantity:Price:MSRP: $15.95Now: $14.36Was: $15.95Subtotal: -
ATHENA Ring Set - Honda CRF250R S41316313
ATHENA
MSRP: $43.95Now: $39.56Was: $43.95Replacement rings for Athena Forged Pistons9120668- SKU:
- 9120668
- Weight:
- 0.10 LBS
MSRP: $43.95Now: $39.56Was: $43.95Qty in Cart: 0Quantity:Price:MSRP: $43.95Now: $39.56Was: $43.95Subtotal: -
ATHENA Piston Ring Set - YZ250F S41316296
ATHENA
MSRP: $41.95Now: $37.76Was: $41.95Replacement rings for Athena Forged Pistons9120605- SKU:
- 9120605
- Weight:
- 0.10 LBS
MSRP: $41.95Now: $37.76Was: $41.95Qty in Cart: 0Quantity:Price:MSRP: $41.95Now: $37.76Was: $41.95Subtotal: -
ATHENA Piston Ring Set S41316138
ATHENA
MSRP: $43.95Now: $39.56Was: $43.95ATHENA Piston Ring Set S41316138Replacement rings for Athena Forged Pistons9120606- SKU:
- 9120606
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- BORE SIZE METRIC:
- 53.96 MM
- PISTON MATERIAL:
- FORGED
- UNITS:
- SET
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
MSRP: $43.95Now: $39.56Was: $43.95 -
ATHENA Ring Set - Big Bore - Honda S41316402
ATHENA
MSRP: $47.95Now: $43.16Was: $47.95Replacement rings for Athena Forged Pistons9120824- SKU:
- 9120824
- Weight:
- 1.00 LBS
MSRP: $47.95Now: $43.16Was: $47.95Qty in Cart: 0Quantity:Price:MSRP: $47.95Now: $43.16Was: $47.95Subtotal: -
ATHENA Crankcase - Yamaha S410130320004
ATHENA
MSRP: $186.95Now: $168.26Was: $186.95ATHENA Crankcase Yamaha S410130320004Made of special steel and manufactured with CNC high-precision machinery, Standard stroke9210019- SKU:
- 9210019
- Availability:
- Ships Same Business Day
- Weight:
- 2.90 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CRANKSHAFT
- UNITS:
- EACH
MSRP: $186.95Now: $168.26Was: $186.95 -
ATHENA Crankshaft - Yamaha/Malaguti S410130320005
ATHENA
MSRP: $186.95Now: $168.26Was: $186.95ATHENA Crankshaft Yamaha/Malaguti S410130320005Made of special steel and manufactured with CNC high-precision machinery, Standard stroke9210020- SKU:
- 9210020
- Availability:
- Ships Same Business Day
- Weight:
- 2.84 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- CRANKSHAFT
- UNITS:
- EACH
MSRP: $186.95Now: $168.26Was: $186.95 -
ATHENA Crankcase - Yamaha YZ85 S410485320002
ATHENA
MSRP: $146.95Now: $132.26Was: $146.95ATHENA Crankcase Yamaha YZ85 S410485320002Made of special steel and manufactured with CNC high-precision machinery, Standard stroke9210589- SKU:
- 9210589
- Availability:
- Ships Same Business Day
- Weight:
- 4.15 LBS
- UNITS:
- EACH
- PRODUCT NAME:
- CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
MSRP: $146.95Now: $132.26Was: $146.95 -
ATHENA Piston Kit S4F05400003B
ATHENA
MSRP: $166.95Now: $150.26Was: $166.95ATHENA Piston Kit S4F05400003BTwo-stroke pistons are made from 4032 silicium, Four-stroke pistons are made from 2618 silicium - the same material used to produce Formula 1 pistons, Both include 3% copper in materials for better heat resistance, All...9100067- SKU:
- 9100067
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- DISPLACEMENT:
- 125 CC
- BORE SIZE METRIC:
- 53.96 MM
- COMPRESSION RATIO IMPERIAL:
- STOCK
- PRODUCT NAME:
- PISTON KIT
- RIDING STYLE:
- STREET
- DISPLACEMENT:
- 124 CC
- PISTON HEAD SHAPE:
- FLAT TOP
- TYPE:
- B
- ENGINE TYPE:
- 2-STROKE
- PISTON MATERIAL:
- 4032 ALUMINUM ALLOY
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $166.95Now: $150.26Was: $166.95 -
ATHENA Piston Kit S4F05400005A
ATHENA
MSRP: $130.95Now: $117.86Was: $130.95ATHENA Piston Kit S4F05400005ATwo-stroke pistons are made from 4032 silicium, Four-stroke pistons are made from 2618 silicium - the same material used to produce Formula 1 pistons, Both include 3% copper in materials for better heat resistance, All...9100072- SKU:
- 9100072
- Availability:
- Ships Same Business Day
- Weight:
- 0.40 LBS
MSRP: $130.95Now: $117.86Was: $130.95Qty in Cart: 0Quantity:Price:MSRP: $130.95Now: $117.86Was: $130.95Subtotal: