Dirt Bike Engine
Discover a full range of dirt bike engine components for rebuilding or upgrading your performance. 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.
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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HOT RODS Crankshaft 4066
HOT RODS
$294.95HOT 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
$294.95 -
HOT RODS Crankshaft 4064
HOT RODS
$492.95HOT 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
$492.95 -
HOT RODS Crankshaft 4071
HOT RODS
$404.95HOT 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
$404.95 -
HOT RODS Crankshaft - Stroker 4148
HOT RODS
$597.95HOT 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
$597.95 -
HOT RODS Crankshaft - Stroker 4149
HOT RODS
$548.95HOT 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
$548.95 -
HOT RODS Crankshaft Assembly 4048
HOT RODS
$430.95HOT 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
$430.95 -
HOT RODS Crankshaft Assembly 4049
HOT RODS
$453.95HOT 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
$453.95 -
HOT RODS Wrist Pin Bearing WB104
HOT RODS
$17.95HOT 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
$17.95 -
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 -
VERTEX Wrist Pin 715036
VERTEX
$4.95VERTEX 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
$4.95 -
ATHENA Piston Ring Set S41316209
ATHENA
$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
$31.95 -
VERTEX Piston Ring 590276800001
VERTEX
$76.95VERTEX 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
$76.95 -
ATHENA Piston Ring Set S41316178
ATHENA
$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
$57.95 -
VERTEX Ring Set 53010005600
VERTEX
$27.95VERTEX 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
$27.95 -
VERTEX Piston Ring 590397000003
VERTEX
$74.95VERTEX 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
$74.95 -
ATHENA Piston Ring Set S41316157
ATHENA
$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
$15.95 -
ATHENA Piston Ring Set S41316119
ATHENA
$42.95ATHENA Piston Ring Set S41316119Replacement rings for Athena Forged Pistons09120103- SKU:
- 09120103
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- RIDING STYLE:
- ADVENTURE TOURING / DUAL-SPORT
- BORE SIZE METRIC:
- 94 MM
- RIDING STYLE:
- OFF-ROAD
- ENGINE TYPE:
- 4-STROKE
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- ATV
- PISTON MATERIAL:
- FORGED
- UNITS:
- SET
$42.95Qty in Cart: 0Quantity:Price:$42.95Subtotal: -
ATHENA Piston Ring Set S41316062
ATHENA
$42.95ATHENA Piston Ring Set S41316062Replacement rings for Athena Forged Pistons09120101- SKU:
- 09120101
- Availability:
- Ships Same Business Day
- Weight:
- 0.05 LBS
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- BORE SIZE METRIC:
- 100.00 MM
- ENGINE TYPE:
- 4-STROKE
- PISTON MATERIAL:
- FORGED
- RIDING STYLE:
- ATV
- UNITS:
- SET
$42.95 -
BBR MOTORSPORTS Piston Rings 411-YTR-1215
BBR MOTORSPORTS
$52.95BBR MOTORSPORTS Piston Rings 411-YTR-1215Piston rings for 88CC, 150CC and 175CC Big Bore Kit09120069- SKU:
- 09120069
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- DISPLACEMENT:
- 150 CC
- PRODUCT NAME:
- PISTON RING
- UNITS:
- SET
- RIDING STYLE:
- OFF-ROAD
$52.95Qty in Cart: 0Quantity:Price:$52.95Subtotal: -
BBR MOTORSPORTS Piston Rings 411-HXR-5212
BBR MOTORSPORTS
$41.95BBR MOTORSPORTS Piston Rings 411-HXR-5212Piston rings for 88CC, 150CC and 175CC Big Bore Kit09120067- SKU:
- 09120067
- Availability:
- Ships Same Business Day
- Weight:
- 0.10 LBS
- DISPLACEMENT:
- 88 CC
- PRODUCT NAME:
- PISTON RING
- RIDING STYLE:
- OFF-ROAD
- UNITS:
- SET
$41.95
