2010 KTM 450SX Complete Transmission Kit: Gear Upgrade

This is a complete OEM transmission Gear set with output shafts and additional gears option.   More…

$1200.00  Was $2675.06

2010 KTM 450SX Complete Transmission Kit: Gear Upgrade

This is a complete OEM transmission Gear set with output shafts and additional gears option.   More…

$1200.00  Was $2675.06

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2010 KTM 450SX Transmission Kit Order Form

This is a complete OEM transmission Gear set with output shafts from factory leftovers, if available. Click the option above to add additional gears.

What’s included with this 2010 KTM 450SX gearbox assembly?

  • main engine gear output shaft

  • sprocket counter-shaft

  • 4-6 gears per shaft, depending on the model.

  • Items like dogs & shift forks are available for specific models.

  • A Convenient way to order hard-to-find items.

  • Feel free to send us pictures of your complete trans so we can double-check that we have sent all the needed to fix your dirt bike trans.

  • Everything’s included and assembled, like in the picture, directly from the OEMs.

  • The product photo is for reference only. The part sent will be specific to the exact make and model of your ride.

Compatibility/Fitment

This is a list of all the years we carry this part for, yet there may be a different part number from year to year. If your bike is listed, no worries; the product will fit your ride. If any mods are done to the bike, please let us know on the checkout page or in a message after purchase so we can send the correct product for your ride.

BrandModelYear
KTMKTM 450SX2009
KTMKTM 450SX2010

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2010 KTM 450SX Complete Transmission Kit: Gear Upgrade 2010 KTM 450SX Complete Transmission Kit: Gear Upgrade
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Hi, I’m looking for a complete 6-speed transmission to install in my 2026 KTM 450 SX-F. I know the SX-F comes stock with a 5-speed gearbox, but the 450 XC-F 2025/2026 uses the same crankcases and runs a 6-speed Pankl transmission.Could you please confirm the following: 1. Do you offer a complete 6-speed gearset compatible with the KTM 450 engines from 2023–2026 (SX-F / XC-F platform)? 2. If yes, can you provide a full kit, including: • Main shaft (if different) • Counter shaft • 1st to 6th gears (primary and secondary) • Shift drum for 6-speed • Shift forks (if different from SX-F) • All spacers, bearings, washers, clips required 3. Is this plug-and-play inside the 2026 SX-F crankcases without machining? 4. Could you send me the exact list of parts included in your kit? 5. What is the total price, including shipping to France (zip code: [YOUR ZIP CODE])? 6. What are the lead times?I want a complete 6-speed XC-F-style transmission, ready to install into my 450 SX-F engine without modification. Please let me know availability and payment options.Thanks! Jf asked on November 27, 2025

Yes thanks for this and add the checkmark option to get the full kit to swap to a 6 speed on ur 26 450 sx-f with all parts needed even gaskets. Just add oil and go! Order on the site and allow 3 weeks for shipping to show tracking to get all parts ready in one package.

 Boston Morse answered on November 27, 2025 store manager
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Im trying to put 70hp thru a 2006 yz450f and ive blown 2 stock transmissions, possibly due to weak shift forks, what do you have available? Jarrett Slater asked on November 3, 2025

Yes we do and will send out a shifter and shaft to further fix this issue.

 Boston Morse answered on November 24, 2025 store manager
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I'm looking for a 5th sliding gear for a 2023 FE 450 part number 79533515000, do you stock this? Dean asked on August 11, 2025

Just full trans assemblies is what we sell.

 Boston Morse answered on August 13, 2025 store manager
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Do you have a complete gear box for 2023 husqvarna fe 450 Dean Cooper asked on August 7, 2025

Yes

 Boston Morse answered on August 8, 2025 store manager
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can i get this for a 2003 kx250 with gearing better for the street? Kud asked on July 3, 2025

Yes!

 Boston Morse answered on July 4, 2025 store manager
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Q & A

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2010 KTM 450SX Complete Transmission Kit: Gear Upgrade 2010 KTM 450SX Complete Transmission Kit: Gear Upgrade
Your question
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Name
* Name is required
* Please tick the checkbox to proceed
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Hi, I’m looking for a complete 6-speed transmission to install in my 2026 KTM 450 SX-F. I know the SX-F comes stock with a 5-speed gearbox, but the 450 XC-F 2025/2026 uses the same crankcases and runs a 6-speed Pankl transmission.Could you please confirm the following: 1. Do you offer a complete 6-speed gearset compatible with the KTM 450 engines from 2023–2026 (SX-F / XC-F platform)? 2. If yes, can you provide a full kit, including: • Main shaft (if different) • Counter shaft • 1st to 6th gears (primary and secondary) • Shift drum for 6-speed • Shift forks (if different from SX-F) • All spacers, bearings, washers, clips required 3. Is this plug-and-play inside the 2026 SX-F crankcases without machining? 4. Could you send me the exact list of parts included in your kit? 5. What is the total price, including shipping to France (zip code: [YOUR ZIP CODE])? 6. What are the lead times?I want a complete 6-speed XC-F-style transmission, ready to install into my 450 SX-F engine without modification. Please let me know availability and payment options.Thanks! Jf asked on November 27, 2025

Yes thanks for this and add the checkmark option to get the full kit to swap to a 6 speed on ur 26 450 sx-f with all parts needed even gaskets. Just add oil and go! Order on the site and allow 3 weeks for shipping to show tracking to get all parts ready in one package.

 Boston Morse answered on November 27, 2025 store manager
(0) (0)
Add an answer
Your answer
* Answer is required
Name
* Name is required
* Please tick the checkbox to proceed
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Im trying to put 70hp thru a 2006 yz450f and ive blown 2 stock transmissions, possibly due to weak shift forks, what do you have available? Jarrett Slater asked on November 3, 2025

Yes we do and will send out a shifter and shaft to further fix this issue.

 Boston Morse answered on November 24, 2025 store manager
(0) (0)
Add an answer
Your answer
* Answer is required
Name
* Name is required
* Please tick the checkbox to proceed
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
I'm looking for a 5th sliding gear for a 2023 FE 450 part number 79533515000, do you stock this? Dean asked on August 11, 2025

Just full trans assemblies is what we sell.

 Boston Morse answered on August 13, 2025 store manager
(0) (0)
Add an answer
Your answer
* Answer is required
Name
* Name is required
* Please tick the checkbox to proceed
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
Do you have a complete gear box for 2023 husqvarna fe 450 Dean Cooper asked on August 7, 2025

Yes

 Boston Morse answered on August 8, 2025 store manager
(0) (0)
Add an answer
Your answer
* Answer is required
Name
* Name is required
* Please tick the checkbox to proceed
This site is protected by reCAPTCHA and the Google Privacy Policy and Terms of Service apply.
can i get this for a 2003 kx250 with gearing better for the street? Kud asked on July 3, 2025

Yes!

 Boston Morse answered on July 4, 2025 store manager
(0) (0)
Add an answer
Your answer
* Answer is required
Name
* Name is required
* Please tick the checkbox to proceed
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Need help with installation? Get a hold of a live agent.

FAQ

Is Shipping Included?

Yes, there is free shipping on all 2010 KTM 450SX Complete Transmission Kit: Gear Upgrade‘s in the continental US.

Is fitment guaranteed?

Yes, when all options are selected for the 2010 KTM 450SX Complete Transmission Kit: Gear Upgrade, fitment is guaranteed.

Do you ship worldwide?

Yes, we ship all products internationally for an additional cost. Additional shipping costs for a product will show when your region is selected on the checkout page under shipping.

What is your product return policy?

With any 2010 KTM 450SX Complete Transmission Kit: Gear Upgrade for sale online, PayPal, Apple Pay, Google Pay and credit card are covered by a 30-day return/replace policy if the product is defective or if you don’t receive what you ordered. But since most products we offer are customized to your order, we cannot accept returns and provide refunds for non-warranty reasons (but our products are easy to sell on eBay or Craigslist!). Read more here.

How do I speak with a live agent?

Use the Q&A feature on any product page (see the Q&A tab on this page, for example) where you can get product-specific answers to your questions, OR get one-on-one pro help by phone or video using our Pro Direct Connect service.
2010 KTM 450SX Complete Transmission Kit: Gear Upgrade 1

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Free Shipping

Free shipping
within the continental US.

Product Options

Upgrades and/or product condition
options are available for this part.

Product Guarantee!

Compatibility and quality is guaranteed!
Return defective items within 30 days.

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