25th Anniversary 2-Stroke Sweepstakes Enter Weekly For a Chance to Win A 2024 KTM 250SX Enter Now
CLOSE
Shipping to US Flag United States
Free shipping over $79
  • Ramps
  • Car & Truck Cargo
Summer Gear Sale Get Up To 65% Off Gear For Summer Shop Now

2003 KTM 300EXC Aftermarket Parts

Fitment Category Brand
Refine

2268 Results

Exact Fit

All Balls
Rear Shock Seal Head Kit

$51.25
Sale
Save 10%
4 out of 5 stars (6) reviews
Video Available
Exact Fit
Colors for Turner Performance Products Aluminum Rear Sprocket

Turner Performance Products
Aluminum Rear Sprocket

$47.99
Sale
Save 20%
5 out of 5 stars (41) reviews
Exact Fit
Colors for Galfer Front Brake Line Kit

Galfer
Front Brake Line Kit

$58.50
Sale
Save 10%
4 out of 5 stars (129) reviews
Video Available
Exact Fit
New
Colors for Acerbis Front Fender
+18 more

Acerbis
Front Fender

$22.99
Sale
Save 23%
4.5 out of 5 stars (120) reviews
Video Available
Exact Fit
New
Colors for Acerbis Radiator Shroud Set
+43 more

Acerbis
Radiator Shroud Set

$39.99
Sale
Save 24%
4.5 out of 5 stars (91) reviews
Video Available
Exact Fit

All Balls
Counter Shaft Seal Kit

$31.65
Sale
Save 10%
4.5 out of 5 stars (67) reviews
Video Available
Colors for ODI Motocross Half-Waffle Grips
+7 more

ODI
Motocross Half-Waffle Grips

$11.95 - $12.95
4.5 out of 5 stars (31) reviews
Exact Fit
New

Wiseco
2-Stroke Piston

$197.39
Sale
Save 20%
4.5 out of 5 stars (255) reviews
Exact Fit

Vertex
Complete Gasket Kit

$55.09
Sale
Save 10%
5 out of 5 stars (7) reviews

Shinko
Mobber Tire Combo

$110.00
Sale
Save 20%
4 out of 5 stars (6) reviews
Colors for Pro Taper Race Cut Half-Waffle Grips

Pro Taper
Race Cut Half-Waffle Grips

$10.15 - $10.19
Sale
Save 5%
4 out of 5 stars (10) reviews
Colors for Pro Taper Pillow Top Lite Grip - Twist Throttle
+2 more

Pro Taper
Pillow Top Lite Grip - Twist Throttle

$13.19
Sale
Save 5%
4.5 out of 5 stars (98) reviews
Exact Fit

All Balls
Swingarm Bearing Kit

$84.45
Sale
Save 10%
4.5 out of 5 stars (86) reviews
Video Available
Exact Fit

Motion Pro
Nylon Throttle Tube

$6.50
4 out of 5 stars (93) reviews
Exact Fit
New

VForce
3 Reed Valve System

$143.06
Sale
Save 10%
4.5 out of 5 stars (249) reviews

Maxima
Fab 1 Spray-On Air Filter Oil

$9.34
Sale
Save 15%
4.5 out of 5 stars (26) reviews
Exact Fit

Vertex
Water Pump Rebuild Kit

$48.69
Sale
Save 10%
4 out of 5 stars (11) reviews

Pro Taper
Grip Glue

$7.86
Sale
Save 6%
4 out of 5 stars (77) reviews
Exact Fit

All Balls
Throttle Cable

$8.96
Sale
Save 10%
3.5 out of 5 stars (42) reviews
Video Available
Colors for Factory Effex Grip Donuts
+17 more

Factory Effex
Grip Donuts

$3.99 - $4.99
Sale
Save 20%
5 out of 5 stars (67) reviews

DID
520VX3 X-Ring Chain

$110.18 - $122.43
Sale
Save 15%
4.5 out of 5 stars (29) reviews
Exact Fit

SKF
Complete High Protection Fork Seal & Wiper Kit

$75.98
5 out of 5 stars (14) reviews
Exact Fit

Dunlop
Geomax MX34 Rear Tire

$118.99
Sale
Save 11%
4.5 out of 5 stars (8) reviews
Exact Fit

Renthal
Sintered Brake Pads

$41.99
Sale
Save 11%
4.5 out of 5 stars (69) reviews
Video Available
Exact Fit

Dunlop
Geomax MX33 Rear Tire

$117.99
Sale
Save 11%
5 out of 5 stars (135) reviews
Video Available
Exact Fit
New

All Balls
Front Caliper Rebuild Kit

$24.71
Sale
Save 10%
4 out of 5 stars (24) reviews
Video Available
Exact Fit
Colors for Supersprox Stealth Rear Sprocket
+2 more

Supersprox
Stealth Rear Sprocket

$107.96
Sale
Save 10%
5 out of 5 stars (63) reviews

Renthal
Diamond Grips - Twist Throttle

$16.99
4.5 out of 5 stars (19) reviews
Video Available
Exact Fit
Colors for Acerbis Swing Arm Rub Plate
+3 more

Acerbis
Swing Arm Rub Plate

$24.99
Sale
Save 17%
4.5 out of 5 stars (82) reviews
Exact Fit

Kenda
Washougal II K786 Rear Tire

$89.99
Sale
Save 20%
4.5 out of 5 stars (27) reviews
Exact Fit

Pivot Works
Wheel Bearing Kit

$25.98
Sale
Save 20%
4.5 out of 5 stars (93) reviews
Video Available

Motion Pro
Alloy Rim Lock

$9.89 - $11.99
5 out of 5 stars (24) reviews
Exact Fit
Colors for Acerbis Mud Flap
+3 more

Acerbis
Mud Flap

$22.99
Sale
Save 23%
3.5 out of 5 stars (20) reviews
Exact Fit

Renthal
520 R1 Works Chain

$114.99
Sale
Save 10%
4.5 out of 5 stars (132) reviews
Video Available

PJ1
Spray Foam Filter Oil

$13.56
Sale
Save 15%
4.5 out of 5 stars (33) reviews
Video Available

NGK
Iridium IX Spark Plugs

$10.76 - $18.85
Sale
Save 10%
4.5 out of 5 stars (38) reviews
Exact Fit

Supersprox
Front Sprocket

$22.46
Sale
Save 10%
4.5 out of 5 stars (20) reviews
Exact Fit

Dunlop
Geomax MX34 Front Tire

$112.99
Sale
Save 11%
5 out of 5 stars (1) review
Exact Fit

Renthal
520 R3-3 SRS Master Link

$7.99
4.5 out of 5 stars (2) reviews

Renthal
Grip Glue

$8.99
Sale
Save 18%
4.5 out of 5 stars (82) reviews
Video Available
Exact Fit

Galfer
Semi-Metallic Brake Pads

$32.99
Sale
Save 9%
4.5 out of 5 stars (25) reviews
Video Available

Maxima
FFT Air Filter Oil

$7.64 - $12.74
Sale
Save 15%
5 out of 5 stars (34) reviews
Colors for Renthal Twinwall Handlebars - Oversized 1-1/8

Renthal
Twinwall Handlebars - Oversized 1-1/8

$153.99 - $186.45
Sale
Save 10%
5 out of 5 stars (92) reviews
Video Available

Renthal
Aramid Dual Comp Grips - Twist Throttle

$25.99
5 out of 5 stars (43) reviews
Video Available
Exact Fit

Vertex
Inner Clutch Cover Gasket

$12.96
Sale
Save 10%
4 out of 5 stars (8) reviews
Exact Fit

FilGuard
Premium Dual Stage Air Filter

$28.99
Sale
Save 10%
4.5 out of 5 stars (33) reviews
Exact Fit
Colors for Polisport Chain Guide
+4 more

Polisport
Chain Guide

$14.99
Sale
Save 18%
4.5 out of 5 stars (23) reviews
Video Available

Motion Pro
Fork Seal Bullets

$4.99
4.5 out of 5 stars (24) reviews
Exact Fit
Colors for Fastway Kick-It Kick Stand

Fastway
Kick-It Kick Stand

$174.95
4.5 out of 5 stars (145) reviews
Colors for Turner Performance Products Rim Lock/Valve Stem Kit
+2 more

Turner Performance Products
Rim Lock/Valve Stem Kit

$5.99 - $7.99
Sale
Save 20%
4.5 out of 5 stars (40) reviews
Exact Fit

Wiseco
Replacement Piston Ring Set

$40.21
Sale
Save 21%
3.5 out of 5 stars (21) reviews

Motion Pro
Chain Tensioner Hardware Kit

$2.99
5 out of 5 stars (5) reviews
Exact Fit
New
Colors for Polisport Side Panel Set
+23 more

Polisport
Side Panel Set

$36.99
Sale
Save 19%
4.5 out of 5 stars (79) reviews
Video Available
Exact Fit

All Balls
Carburetor Mid Body Gasket Kit

$15.01
Sale
Save 10%
4.5 out of 5 stars (5) reviews
Exact Fit

Dirt Tricks
Front Sprocket

$37.99
Sale
Save 16%
4 out of 5 stars (7) reviews
Colors for ODI Emig Pro Lock-On Grips

ODI
Emig Pro Lock-On Grips

$31.95
4.5 out of 5 stars (42) reviews
Exact Fit

DID
520VO O-Ring Chain

$76.71
Sale
Save 15%
4.5 out of 5 stars (48) reviews

DID
520ERVT X-Ring Chain

$152.08
Sale
Save 15%
5 out of 5 stars (13) reviews

Motion Pro
Clutch Lever Assembly

$17.99 - $21.99
3.5 out of 5 stars (9) reviews
Exact Fit

SKF
Fork Seal And Wiper

$37.99
4.5 out of 5 stars (43) reviews

2003 KTM 300EXC Aftermarket Parts

At MotoSport you'll find all the 2003 KTM 300EXC aftermarket parts you need to make your next ride your best ride. We aim to please and suit a wide variety of bikes and riding styles, as well. We carry a large selection of dirt bike exhausts to give you the option of a race ready system or for more modest engines.

Not only do we carry the 2003 KTM 300EXC aftermarket parts that give your dirt bike a performance boost, we also carry the parts to keep your ride feeling smooth. Sometimes the parts that keep your bike riding its best come directly from the manufacturer. At MotoSport you can also find the OEM dirt bike parts to complete almost any job, from a basic fender bolt to a complete new top end if you prefer to stick with stock.

Finding all the parts and gear you need has never been easier - and shipping your parts and gear is free on orders more than $79! You've got more choices than ever when it comes to where to buy, and we always want to provide the best shopping experience in the industry. If you run into trouble or need help finding specific parts for your 2003 KTM 300EXC give a gearhead a call at 1-888-676-8853 and we'll get you ready to ride.