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My Ride: 1999 KTM 250SX
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Dirt Bike Engine Parts

Applied Refinements
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114 Results

Exact Fit
$8 Fast cash

Wiseco
2-Stroke Piston
$189.99
Sale
Save 10%
4.5 out of 5 stars (259) reviews
Exact Fit
New
$8 Fast cash

Vertex
2-Stroke Piston
$172.51
Sale
Save 21%
4.5 out of 5 stars (167) reviews
Exact Fit
$6 Fast cash

Wiseco
Piston Kit - 2-Stroke
$239.51
Sale
Save 50%
5 out of 5 stars (247) reviews
Exact Fit
New
$7 Fast cash

Vertex
Complete Gasket Kit With Seals
$102.57
Sale
Save 5%
4 out of 5 stars (29) reviews
Exact Fit
$5 Fast cash

Pro X
Piston Kit - 2-Stroke
$147.29
Sale
Save 5%
5 out of 5 stars (40) reviews
Exact Fit
New
$6 Fast cash

Pro X
2-Stroke Piston
$149.99
Sale
Save 10%
4.5 out of 5 stars (62) reviews
Exact Fit
$7 Fast cash

Vertex
Top End Gasket Kit
$31.19
Sale
Save 5%
5 out of 5 stars (16) reviews
Exact Fit
$3 Fast cash

Turner Performance Products
Oversized Radiator
$109.99
Sale
Save 15%
4 out of 5 stars (10) reviews
Exact Fit
$3 Fast cash

Pro X
Top End Gasket Kit
$27.93
Sale
Save 10%
5 out of 5 stars (2) reviews
Exact Fit
$6 Fast cash

Vertex
2-Stroke Piston Kit - Stock Bore
$221.94
Sale
Save 16%
4.5 out of 5 stars (79) reviews
Exact Fit
$7 Fast cash

Pro X
Complete Gasket Set
$89.99
Sale
Save 10%
Exact Fit
New
$7 Fast cash

Pro X
Connecting Rod Kit
$119.99
Sale
Save 10%
Exact Fit
$7 Fast cash

EBC
CK Clutch Kit
$111.07
Sale
Save 5%
4.5 out of 5 stars (28) reviews
Exact Fit
$8 Fast cash

Pro X
Complete Clutch Plate Set
$189.99
Sale
Save 10%
4 out of 5 stars (5) reviews
Exact Fit
$9 Fast cash

Myler's
SuperCool Radiator
$140.77
Sale
Save 20%
3.5 out of 5 stars (68) reviews
Exact Fit
$1 Fast cash
Colors for Works Connection Oil Filler Plug
+5 more

Works Connection
Oil Filler Plug
$29.95
5 out of 5 stars (42) reviews
Exact Fit
$5 Fast cash

Cometic
Top End Gasket Kit
$46.88
4 out of 5 stars (248) reviews
Exact Fit
$5 Fast cash

Pro X
Crankshaft Bearing and Seal Kit
$130.99
Sale
Save 10%
5 out of 5 stars (1) review
Exact Fit
$4 Fast cash

Vertex
Water Pump Rebuild Kit
$60.14
Sale
Save 5%
4 out of 5 stars (13) reviews
Exact Fit
$10 Fast cash

Vertex
Complete Gasket Kit
$72.41
Sale
Save 5%
5 out of 5 stars (8) reviews
Exact Fit
$2 Fast cash

Wiseco
Replacement Piston Ring Set
$44.99
Sale
Save 15%
3.5 out of 5 stars (22) reviews
Exact Fit
$3 Fast cash

Vertex
Oil Seal Kit
$38.50
Sale
Save 5%
5 out of 5 stars (2) reviews
Exact Fit
$11 Fast cash

Barnett
Clutch Kit
$278.66
4.5 out of 5 stars (156) reviews
Exact Fit
$1 Fast cash
Colors for Ride Engineering Oil Filler Plug

Ride Engineering
Oil Filler Plug
$21.95
Sale
Save 12%
4 out of 5 stars (9) reviews
Exact Fit
$6 Fast cash

Turner Performance Products
Oversized Radiator Combo
$200.00
Sale
Save 32%
2.5 out of 5 stars (2) reviews
Exact Fit
$1 Fast cash

All Balls
Counter Shaft Seal Kit
$39.69
Sale
Save 5%
4 out of 5 stars (73) reviews
Exact Fit
$9 Fast cash

Wiseco
Clutch Pack Kit
$269.99
Sale
Save 10%
4.5 out of 5 stars (149) reviews
Exact Fit
$4 Fast cash

VForce
3 Reed Valve System
$148.50
Sale
Save 10%
4.5 out of 5 stars (251) reviews
Exact Fit
$1 Fast cash

Wiseco
Needle Bearing
$22.99
Sale
Save 11%
4.5 out of 5 stars (46) reviews
Exact Fit
$4 Fast cash

Wiseco
Gasket Kit - Top End
$47.99
Sale
Save 9%
4 out of 5 stars (11) reviews
Exact Fit
$8 Fast cash

EBC
Dirt Racer Clutch Kit
$155.77
Sale
Save 5%
4 out of 5 stars (126) reviews
Exact Fit
$1 Fast cash

Rekluse
Slave Cylinder Rebuild Kit
$49.00
5 out of 5 stars (1) review
Exact Fit
$23 Fast cash

Rekluse
TorqDrive Clutch Pack
$429.00
4.5 out of 5 stars (11) reviews
Exact Fit
$2 Fast cash

VForce
3 Replacement Reeds
$58.50
Sale
Save 10%
4.5 out of 5 stars (36) reviews
Exact Fit
$1 Fast cash

Boyesen
Rad Valve Boot
$18.95
Sale
Save 5%
5 out of 5 stars (1) review
Exact Fit
New
$1 Fast cash

Pro X
Crankshaft Bearing
$84.50
Sale
Save 5%
4.5 out of 5 stars (8) reviews
Exact Fit
$1 Fast cash

All Balls
Crank Shaft Seal Kit
$39.82
Sale
Save 5%
5 out of 5 stars (6) reviews
Exact Fit
$1 Fast cash

Wiseco
Clutch Spring Kit
$39.99
Sale
Save 9%
Exact Fit
$16 Fast cash

Rekluse
Clutch Basket
$329.00
Exact Fit
$2 Fast cash

Boyesen
Pro Series Carbon Fiber Dual Stage Reeds
$50.77
Clearance
Save 19%
5 out of 5 stars (9) reviews
Exact Fit
$4 Fast cash

Devol
Radiator Guards
$101.96
Sale
Save 15%
4.5 out of 5 stars (164) reviews
Exact Fit
$14 Fast cash

Myler's
SuperCool Radiator Combo
$315.77
Sale
Save 17%
3.5 out of 5 stars (15) reviews
Exact Fit
New
$15 Fast cash

HOT RODS
Connecting Rod Kit
$144.35
Sale
Save 5%
5 out of 5 stars (15) reviews
Exact Fit
$8 Fast cash

Wiseco
Friction Plate Set
$194.99
Sale
Save 10%
Exact Fit
$2 Fast cash

VForce
2 Replacement Reeds
$58.50
Sale
Save 10%
4.5 out of 5 stars (6) reviews
Exact Fit
New
$1 Fast cash

Turner Performance Products
Crank Shaft Seal Kit
$39.82
Sale
Save 5%
Exact Fit
New
$1 Fast cash

Turner Performance Products
Counter Shaft Seal Kit
$31.65
Sale
Save 24%
Exact Fit
$9 Fast cash

Rick's Motorsport Electrics
Stator
$128.95
3 out of 5 stars (2) reviews
Exact Fit
$14 Fast cash
Colors for Rekluse Core EXP Upgrade Kit - EXP 3.0 To 4.0
+2 more

Rekluse
Core EXP Upgrade Kit - EXP 3.0 To 4.0
$479.00
Exact Fit
New
$1 Fast cash

HOT RODS
Needle Bearing
$22.90
Sale
Save 5%
4.5 out of 5 stars (11) reviews
Exact Fit
$1 Fast cash
Colors for Hammerhead Designs Oil Filler Plug

Hammerhead Designs
Oil Filler Plug
$29.99
Exact Fit
$4 Fast cash

Electrosport
Regulator/Rectifier
$22.46
Sale
Save 10%
3.5 out of 5 stars (14) reviews
Exact Fit
$9 Fast cash

EBC
Dirt Racer Carbon Fiber Clutch Kit
$309.70
Sale
Save 5%
$15 Fast cash

JD Jetting
Keihin PWK Carburetor
$498.95
4.5 out of 5 stars (41) reviews
$1 Fast cash

Twin Air
Radiator Pressure Cap
$32.99 - $35.95
Sale
Save 8%
4 out of 5 stars (5) reviews
$5 Fast cash

Trail Tech
Universal Fan Kit
$219.95
4.5 out of 5 stars (17) reviews
$1 Fast cash

Mikuni
Small Round Main Jet
$14.77 - $21.85
$1 Fast cash

Mikuni
Large Hex Main Jet
$21.85
$2 Fast cash

Turner Performance Products
Hour Meter With Mount
$30.99
Sale
Save 22%
5 out of 5 stars (1) review
$1 Fast cash

Mikuni
Pilot Jet M28/1001
$21.85

Dirt Bike Engine

Staying on top of general maintenance goes a long way towards the life of your 2-stroke or 4-stroke dirt bike engine. Eventually though, dirt bike engine parts break down, seize up and need replacing. MotoSport carries what you need for the simple jobs like oil changes or the major overhauls like a complete engine rebuild or replacing the clutch on your dirt bike. So, don't let a slipping clutch or blown motor ruin your planned ride day. We stock the top names in aftermarket dirt bike engine parts or stick with the proven performance of OEM. We carry a full line of dirt bike engine parts so you can grab everything you need right here. Replace the blown motor with a piston kit from Wiseco, Vertex or Wrench Rabbit among other popular brands. Smashed radiator? We'll get you back riding in no time. First things first, extend the life of the motor by keeping up on oil and filter changes. We've got gaskets to take care of that eventual leak, too. Find all the necessary dirt bike engine parts you need at MotoSport. If you need help finding a specific engine part for your dirt bike or have a question on upgrades, or using aftermarket verses OEM dirt bike engine parts, give one of our gearheads a call at 503-783-5645 who can help answer any questions, provide advice and even some instructions on installation.