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!
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On Sale
HOT RODS Crankshaft Kit CBK0014
HOT RODS
MSRP: $409.95Now: $376.16Was: $423.95HOT RODS Crankshaft Kit CBK0014Assembly sold complete with Hot Rods connecting rod, Factory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely...09210273- SKU:
- 09210273
- Availability:
- Ships Same Business Day
- Weight:
- 8.10 LBS
- PRODUCT NAME:
- CRANKSHAFT KIT
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- TYPE:
- OEM
MSRP: $409.95Now: $376.16Was: $423.95 -
On Sale
HOT RODS Crankshaft Kit CBK0013
HOT RODS
MSRP: $409.95Now: $376.16Was: $423.95HOT RODS Crankshaft Kit CBK0013Assembly sold complete with Hot Rods connecting rod, Factory assembled and true to OEM specifications, Hot Rods cranks will meet or surpass the OEM in performance, Ready for installation, Crankshaft is completely...09210272- SKU:
- 09210272
- Availability:
- Ships Same Business Day
- Weight:
- 8.50 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- PRODUCT NAME:
- CRANKSHAFT KIT
- TYPE:
- OEM
MSRP: $409.95Now: $376.16Was: $423.95 -
On Sale
HOT RODS Crankshaft 4028
HOT RODS
MSRP: $452.95Now: $415.76Was: $468.95HOT RODS Crankshaft 4028Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...09210237- SKU:
- 09210237
- Availability:
- Ships Same Business Day
- Weight:
- 10.01 LBS
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- MODEL:
- 2-CYCLE
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC TO 300 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
MSRP: $452.95Now: $415.76Was: $468.95 -
On Sale
HOT RODS Crankshaft 4026
HOT RODS
MSRP: $506.95Now: $310.00Was: $516.95HOT RODS Crankshaft 4026Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...09210236- SKU:
- 09210236
- Availability:
- Ships Same Business Day
- Weight:
- 9.00 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- COLOR/FINISH:
- STEEL
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH METRIC:
- 72.00 MM
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC
- MATERIAL:
- 4140 STEEL
- MODEL:
- 2-CYCLE
- UNITS:
- ASSEMBLY
MSRP: $506.95Now: $310.00Was: $516.95 -
On Sale
HOT RODS Crankshaft 4066
HOT RODS
MSRP: $258.95Now: $237.56Was: $267.95HOT RODS Crankshaft 4066Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...09210075- SKU:
- 09210075
- Availability:
- Ships Same Business Day
- Weight:
- 4.61 LBS
- DISPLACEMENT:
- 85 CC TO 100 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 2-CYCLE
- FEATURES:
- STANDARD CRANKSHAFT
- STROKE LENGTH METRIC:
- 45.80 MM
- TYPE:
- OEM STROKE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- ASSEMBLY
MSRP: $258.95Now: $237.56Was: $267.95 -
On Sale
HOT RODS Crankshaft 4064
HOT RODS
MSRP: $431.95Now: $396.86Was: $447.95HOT RODS Crankshaft 4064Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...09210073- SKU:
- 09210073
- Availability:
- Ships Same Business Day
- Weight:
- 7.13 LBS
- MODEL:
- 4-CYCLE
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 53.60 MM
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
MSRP: $431.95Now: $396.86Was: $447.95 -
On Sale
HOT RODS Crankshaft 4071
HOT RODS
MSRP: $355.95Now: $326.66Was: $367.95HOT RODS Crankshaft 4071Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and ready for...09210051- SKU:
- 09210051
- Availability:
- Ships Same Business Day
- Weight:
- 4.81 LBS
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH METRIC:
- 48.90 MM
- DISPLACEMENT:
- 85 CC TO 105 CC
- MATERIAL:
- 4140 STEEL
- UNITS:
- ASSEMBLY
- FEATURES:
- STANDARD CRANKSHAFT
- MODEL:
- 2-CYCLE
- TYPE:
- OEM STROKE
MSRP: $355.95Now: $326.66Was: $367.95 -
On Sale
HOT RODS Crankshaft - Stroker 4148
HOT RODS
MSRP: $525.95Now: $482.36Was: $543.95HOT RODS Crankshaft Stroker 4148Hot Rods has developed six long-stroke applications for ATVs, Special pistons for TRX400EX, KFX/LTZ 400, Banshee, Warrior and Raptor make these installations simple by avoiding machine work and parts typically required for...09210040- SKU:
- 09210040
- Availability:
- Ships Same Business Day
- Weight:
- 9.75 LBS
- DISPLACEMENT:
- 470 CC
- MODEL:
- 4-CYCLE
- TYPE:
- STROKER
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 65.00 MM
- UNITS:
- ASSEMBLY
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- STROKE LENGTH:
- 65,00 MM
MSRP: $525.95Now: $482.36Was: $543.95 -
On Sale
HOT RODS Crankshaft - Stroker 4149
HOT RODS
MSRP: $481.95Now: $442.76Was: $498.95HOT RODS Crankshaft Stroker 4149Hot Rods has developed six long-stroke applications for ATVs, Special pistons for TRX400EX, KFX/LTZ 400, Banshee, Warrior and Raptor make these installations simple by avoiding machine work and parts typically required for...09210039- SKU:
- 09210039
- Availability:
- Ships Same Business Day
- Weight:
- 6.88 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- STROKE LENGTH:
- 56,60 MM
- TYPE:
- STROKER
- FEATURES:
- STANDARD CRANKSHAFT
- RIDING STYLE:
- OFF-ROAD
- DISPLACEMENT:
- 264 CC
- MODEL:
- 4-CYCLE
- COLOR/FINISH:
- STEEL
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 56.60 MM
- UNITS:
- ASSEMBLY
MSRP: $481.95Now: $442.76Was: $498.95 -
On Sale
HOT RODS Crankshaft Assembly 4048
HOT RODS
MSRP: $377.95Now: $347.36Was: $391.95HOT RODS Crankshaft Assembly 4048Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...09210015- SKU:
- 09210015
- Availability:
- Ships Same Business Day
- Weight:
- 9.80 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 4-CYCLE
- COLOR/FINISH:
- STEEL
- DISPLACEMENT:
- 450 CC
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM STROKE
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 62.00 MM
- UNITS:
- ASSEMBLY
MSRP: $377.95Now: $347.36Was: $391.95 -
On Sale
HOT RODS Crankshaft Assembly 4049
HOT RODS
MSRP: $398.95Now: $366.26Was: $412.95HOT RODS Crankshaft Assembly 4049Sold complete with the original proven Hot Rods connecting rods, top-end bearings and crankshaft webs, Factory assembled and trued to OEM specifications; meet or surpass OEM in performance and durability, Complete and...09210013- SKU:
- 09210013
- Availability:
- Ships Same Business Day
- Weight:
- 6.95 LBS
- PRODUCT NAME:
- CRANKSHAFT ASSEMBLY
- MODEL:
- 4-CYCLE
- UNITS:
- ASSEMBLY
- COLOR/FINISH:
- STEEL
- RIDING STYLE:
- OFF-ROAD
- TYPE:
- OEM STROKE
- DISPLACEMENT:
- 250 CC
- FEATURES:
- HEAVY DUTY CRANKSHAFT
- MATERIAL:
- 4140 STEEL
- STROKE LENGTH METRIC:
- 53.60 MM
MSRP: $398.95Now: $366.26Was: $412.95 -
On Sale
HOT RODS Wrist Pin Bearing WB104
HOT RODS
MSRP: $14.55Now: $13.37Was: $15.95HOT RODS Wrist Pin Bearing WB104OEM replacement wrist pin bearings, Case hardened bearing cages, Flat bearing cage profiles and long shouldered bearing cages are use because they are better suited for high RPM applications09130302- SKU:
- 09130302
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- DISPLACEMENT:
- 65 CC
- UNITS:
- EACH
- TYPE:
- WRIST PIN
- PRODUCT NAME:
- BEARING
- RIDING STYLE:
- OFF-ROAD
MSRP: $14.55Now: $13.37Was: $15.95 -
On Sale
VERTEX Piston Circlips - TM/MX 85 72066K
VERTEX
MSRP: $2.95Now: $2.00Was: $2.95VERTEX Piston Circlips TM/MX 85 72066KOEM Replacements for Vertex piston kits.09130300- SKU:
- 09130300
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
- APPLICATION:
- PISTON
- PRODUCT NAME:
- CIRCLIP
MSRP: $2.95Now: $2.00Was: $2.95 -
On Sale
VERTEX Wrist Pin 715036
VERTEX
MSRP: $3.95Now: $3.56Was: $3.95VERTEX Wrist Pin 715036Case 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...09130103- SKU:
- 09130103
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- WRIST PIN
- RIDING STYLE:
- OFF-ROAD
- APPLICATION:
- PISTON
- UNITS:
- EACH
MSRP: $3.95Now: $3.56Was: $3.95 -
On Sale
ATHENA Piston Ring Set S41316209
ATHENA
MSRP: $31.95Now: $28.76Was: $31.95ATHENA Piston Ring Set S41316209Replacement rings for Athena Forged Pistons09120434- SKU:
- 09120434
- Availability:
- Ships Same Business Day
- Weight:
- 0.01 LBS
- UNITS:
- SET
- PISTON MATERIAL:
- FORGED
- BORE SIZE METRIC:
- 52.96 MM
- ENGINE TYPE:
- 2-STROKE
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
MSRP: $31.95Now: $28.76Was: $31.95 -
VERTEX Piston Ring 590276800001
VERTEX
$6,295.50VERTEX Piston Ring 590276800001Replacement 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...09120386- SKU:
- 09120386
- Availability:
- Ships Same Business Day
- Weight:
- 0.04 LBS
- BORE SIZE METRIC:
- 76.80 MM
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- PISTON DIAMETER METRIC:
- 77.95 MM
- UNITS:
- SET
$6,295.50 -
On Sale
ATHENA Piston Ring Set S41316178
ATHENA
MSRP: $57.95Now: $52.16Was: $57.95ATHENA Piston Ring Set S41316178Replacement rings for Athena Forged Pistons09120374- SKU:
- 09120374
- Availability:
- Ships Same Business Day
- Weight:
- 0.03 LBS
- BORE SIZE METRIC:
- 100.00 MM
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED
- UNITS:
- SET
MSRP: $57.95Now: $52.16Was: $57.95 -
On Sale
VERTEX Ring Set 53010005600
VERTEX
MSRP: $24.95Now: $22.46Was: $24.95VERTEX Ring Set 53010005600Replacement 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...09120366- SKU:
- 09120366
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
- PRODUCT NAME:
- PISTON RING
- PISTON DIAMETER METRIC:
- 55.95 MM
MSRP: $24.95Now: $22.46Was: $24.95 -
On Sale
VERTEX Piston Ring 590397000003
VERTEX
MSRP: $69.95Now: $62.96Was: $69.95VERTEX Piston Ring 590397000003Replacement Piston Rings09120352- SKU:
- 09120352
- Availability:
- Ships Same Business Day
- Weight:
- 0.06 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- KIT
MSRP: $69.95Now: $62.96Was: $69.95 -
On Sale
ATHENA Piston Ring Set S41316157
ATHENA
MSRP: $15.95Now: $14.36Was: $15.95ATHENA Piston Ring Set S41316157Replacement rings for Athena Forged Pistons09120104- SKU:
- 09120104
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PISTON MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- PISTON RING
- ENGINE TYPE:
- 2-STROKE
- BORE SIZE METRIC:
- 57.94 MM
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
MSRP: $15.95Now: $14.36Was: $15.95
