Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt

An easy option for a bolt and ride 1983 KTM 420 Motor that’s complete and ready to use!   More…

$4800.00  Was $5848.99

Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt

An easy option for a bolt and ride 1983 KTM 420 Motor that’s complete and ready to use!   More…

$4800.00  Was $5848.99

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1983 KTM 420 Complete Motor Assembly:

When a New engine isn’t available here is an easy option for a bolt and ride 1983 KTM 420 Motor that’s complete and ready to use! We’ve sold more dirt bike engines than anyone else in the last 15 years so we know how to source and inspect these assembled turnkey engine kits.

New engine kits are available as well in this store.

What’s included with this 1983 KTM 420 Engine assembly?

    • Complete Clutch

    • Complete Cylinder

    • Transmission

    • Crankshaft & Connecting Rod

    • Piston

    • All Seals & Gaskets needed to run

    • Stator & Flywheel

    • Add Fluids & Ride!

    • The product photo is for reference only.

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 4201979
KTMKTM 4201980
KTMKTM 4201981
KTMKTM 4201982
KTMKTM 4201983
KTMKTM 4201984

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Looking for a complete 1996 RM80 engine to bolt on not trying to put anything together just to complete engine bolt on and run Blaine asked on November 21, 2025

Correct, this is a bolt and ride engine: just add fluids.

 Boston Morse answered on November 23, 2025 store manager
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what are the hours on a used motor for a Kim sxf 350 2016 or can I specify a rebuilt motor? Robert Puccinelli asked on November 20, 2025

We have a OEM Left over for this model with only 10 total hours of use ready to ship in less than 3 weeks.

 Boston Morse answered on November 23, 2025 store manager
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I’m looking for a KTM 890 adventure engine. Please let me know when you have any in stock. Richard Smith asked on November 13, 2025

Just have the new engine kit for this model.

 Boston Morse answered on November 17, 2025 store manager
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Interested in a rebuilt xr 650r motor. Would I send you my core, and what would that be worth? Thanks Scott asked on November 13, 2025

Hi We do have a OEM Engine for the Xr650r as its all original left over with only one ride on it, We can do it for the price posted if a core is sent in yet post ur engine on eBay and see if ya can get $700+ if not we can do it at that price.

 Boston Morse answered on November 13, 2025 store manager
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Do you have a crf 1000l motor for 2017 africa twin? Preston smith asked on November 11, 2025

Yes we do

 Boston Morse answered on November 12, 2025 store manager
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Ask a question
Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt
Your question
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* Name is required
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Looking for a complete 1996 RM80 engine to bolt on not trying to put anything together just to complete engine bolt on and run Blaine asked on November 21, 2025

Correct, this is a bolt and ride engine: just add fluids.

 Boston Morse answered on November 23, 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.
what are the hours on a used motor for a Kim sxf 350 2016 or can I specify a rebuilt motor? Robert Puccinelli asked on November 20, 2025

We have a OEM Left over for this model with only 10 total hours of use ready to ship in less than 3 weeks.

 Boston Morse answered on November 23, 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 KTM 890 adventure engine. Please let me know when you have any in stock. Richard Smith asked on November 13, 2025

Just have the new engine kit for this model.

 Boston Morse answered on November 17, 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.
Interested in a rebuilt xr 650r motor. Would I send you my core, and what would that be worth? Thanks Scott asked on November 13, 2025

Hi We do have a OEM Engine for the Xr650r as its all original left over with only one ride on it, We can do it for the price posted if a core is sent in yet post ur engine on eBay and see if ya can get $700+ if not we can do it at that price.

 Boston Morse answered on November 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 crf 1000l motor for 2017 africa twin? Preston smith asked on November 11, 2025

Yes we do

 Boston Morse answered on November 12, 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.

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FAQ

Is Shipping Included?

Yes, there is free shipping on all Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt‘s in the continental US.

Is fitment guaranteed?

Yes, when all options are selected for the Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt, 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 Engine Assembly Complete 1983 KTM 420 Motor Used or Rebuilt 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.
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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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