Yamaha 1990 YZ125 Top End Cylinder & Piston Kit

Yamaha 1990 YZ125 Cylinder and Top End kit. Older models may require sending in the original cylinder to be serviced.   More…

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$1375.00  Was $1488.67

Yamaha 1990 YZ125 Top End Cylinder & Piston Kit

Yamaha 1990 YZ125 Cylinder & Top End kit. Older models may require sending in the original cylinder to be serviced.

What’s included?

 
  • Piston and matching rings
  • Wrist pin
  • Piston clips
  • Gaskets
  • cylinder if applicable most 2010 and older models will need to send in their cylinder.

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
YamahaYZ1251998
YamahaYZ1251999
YamahaYZ1252000
YamahaYZ1252001
YamahaYZ1252002
YamahaYZ1252004
YamahaYZ1252005
YamahaYZ1252006
YamahaYZ1252007
YamahaYZ1252008
YamahaYZ1252009
YamahaYZ1252010
YamahaYZ1252011
YamahaYZ1252012
YamahaYZ1252013
YamahaYZ1252014
YamahaYZ1252015
YamahaYZ1252016
YamahaYZ1252017
YamahaYZ1252018
YamahaYZ1252019
YamahaYZ1252020
YamahaYZ1251974
YamahaYZ1251975
YamahaYZ1251976
YamahaYZ1251977
YamahaYZ1251978
YamahaYZ1251979
YamahaYZ1251980
YamahaYZ1251981
YamahaYZ1251982
YamahaYZ1251983
YamahaYZ1251984
YamahaYZ1251985
YamahaYZ1251986
YamahaYZ1251987
YamahaYZ1251988
YamahaYZ1251989
YamahaYZ1251990
YamahaYZ1251991
YamahaYZ1251992
YamahaYZ1251993
YamahaYZ1251994
YamahaYZ1251995
YamahaYZ1251996
YamahaYZ1251997
YamahaYZ1252003
YamahaYZ1252021
YamahaYZ1252022
YamahaYZ1252023
YamahaYZ1252024
YamahaYZ1252025
YamahaYZ1252026

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Yamaha 1990 YZ125 Top End Cylinder & Piston Kit Yamaha 1990 YZ125 Top End Cylinder & Piston Kit
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What can you guys do when it comes to replacing a 1993 ktm 300sx two stroke cylinder? Mine has a crack in it and is no longer usable. How much would this cost? Are you located in the USA? Christopher Willingham asked on November 20, 2025

Yes San Diego yet all we have is a complete engines for this model currently unless looking to send in ur stock cyl.

 Boston Morse answered on November 23, 2025 store manager
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Y’all carry a cylinder jug for a 2001 suzuki rm 250? Jaimi asked on July 12, 2025

We do! Might be a 4-6 week wait once purchase tho!

 Boston Morse answered on July 17, 2025 store manager
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So would I just order this and it would come with a cylinder or would I have to send stuff in I have a 2005 kx250 2stroke Ruben asked on June 29, 2025

just have a new in box for $2000.00 would need to rebuild ur old cylinder at this price as they are quite rare and only a few left from japan.

 Boston Morse answered on June 30, 2025 store manager
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Why doesn't this cylinder show the power valve setup 2002 had a power valve?? Jerry Burns asked on June 17, 2025

we use generic photos for the site with 3,000,000 pages

 Boston Morse answered on June 22, 2025 store manager
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I have a 1997 kx125 will anything fit my bike like OEM I currently rebuilding the whole bike and the threads are gone and can’t be retaped Bailey-jacob Tebbs asked on May 28, 2025

Yes can help with full builds at this time to correctly fix the bike!

 Boston Morse answered on May 30, 2025 store manager
(0) (0)
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Your answer
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Q & A

Ask a question
Yamaha 1990 YZ125 Top End Cylinder & Piston Kit Yamaha 1990 YZ125 Top End Cylinder & Piston Kit
Your question
* Question 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 can you guys do when it comes to replacing a 1993 ktm 300sx two stroke cylinder? Mine has a crack in it and is no longer usable. How much would this cost? Are you located in the USA? Christopher Willingham asked on November 20, 2025

Yes San Diego yet all we have is a complete engines for this model currently unless looking to send in ur stock cyl.

 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.
Y’all carry a cylinder jug for a 2001 suzuki rm 250? Jaimi asked on July 12, 2025

We do! Might be a 4-6 week wait once purchase tho!

 Boston Morse answered on July 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.
So would I just order this and it would come with a cylinder or would I have to send stuff in I have a 2005 kx250 2stroke Ruben asked on June 29, 2025

just have a new in box for $2000.00 would need to rebuild ur old cylinder at this price as they are quite rare and only a few left from japan.

 Boston Morse answered on June 30, 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.
Why doesn't this cylinder show the power valve setup 2002 had a power valve?? Jerry Burns asked on June 17, 2025

we use generic photos for the site with 3,000,000 pages

 Boston Morse answered on June 22, 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 have a 1997 kx125 will anything fit my bike like OEM I currently rebuilding the whole bike and the threads are gone and can’t be retaped Bailey-jacob Tebbs asked on May 28, 2025

Yes can help with full builds at this time to correctly fix the bike!

 Boston Morse answered on May 30, 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 Yamaha 1990 YZ125 Top End Cylinder & Piston Kit‘s in the continental US.

Is fitment guaranteed?

Yes, when all options are selected for the Yamaha 1990 YZ125 Top End Cylinder & Piston Kit, 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 Yamaha 1990 YZ125 Top End Cylinder & Piston Kit 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.
Yamaha 1990 YZ125 Top End Cylinder & Piston Kit 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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