2000 KX500 Rear Brake Upgrade - Master Cylinder Reservoir Assembly- what year and model is this product from. Is there a caliper that works with it as well?

In the front we have a Brembo caliper and Nissin upgrade, the rear caliper we have rebuilt ones yet none for that model. Rear master size and model is based on what your specs ur requesting.

Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir

Q: Do you ship worldwide?

Yes, OEM Honda 2021 CRF450X Parts ships 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.

Q: How do I speak with a live agent?

Click on the dirtbike helmet icon for a quick email or text-back response to any question you have.

Honda 2021 CRF450X Rear Brake Cylinder Upgrade:

This Complete Honda 2021 CRF450X Rear Master Cylinder Reservoir Upgrade can be built for either a firmer brake pedal or a more progressive feel. To upgrade the Billet Brembo CNC Rear Brake Cylinder in the last photo, click the upgrade option.

Select the green option above if a more progressive is desired.

What’s included with this Honda 2021 CRF450X Rear Brake Cylinder?

- Nissin or Brembo – Brake master that’s fully assembled.
- Titanium mounting & cover bolts.
- Built-in Spring and CNC Clevis.
- Built-in reservoir cap replaces older designs with remote plastic reservoirs.
- Installed Piston & seals.
- Genuine rubber dust cover and spring.
- Everything’s included and assembled as reference pictures.

Just Bleed & 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.

Brand	Model	Year
Honda	CRF450X	2005
Honda	CRF450X	2006
Honda	CRF450X	2007
Honda	CRF450X	2008
Honda	CRF450X	2009
Honda	CRF450X	2010
Honda	CRF450X	2011
Honda	CRF450X	2012
Honda	CRF450X	2013
Honda	CRF450X	2014
Honda	CRF450X	2015
Honda	CRF450X	2016
Honda	CRF450X	2017
Honda	CRF450X	2019
Honda	CRF450X	2020
Honda	CRF450X	2021
Honda	CRF450X	2022
Honda	CRF450X	2023
Honda	CRF450X	2024
Honda	CRF450X	2025

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2025 CRF450RL has 3/8 rear brake master cylinder which is the small piston. I want to order the progressive master cylinder from you guys which also has the small piston. What is the difference between the OEM master VS your progressive master? I need precision rear braking for wheelies, the OEM has a numb feeling. TIA. Adrian asked on March 10, 2025

9mm 3/8 is the smallest for that model just have 11 and 13mm for better strength.

Boston Morse answered on March 13, 2025 store manager

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I race flattrack and we rely on rear brake feel to controls wheel spin. Recently switched to a 2025 Yamaha 450 and it’s way too grabby. What recommendations yall have thanks Justin jones asked on January 17, 2025

yes we have a 15% smaller piston available

Boston Morse answered on January 17, 2025 store manager

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comment kit installer sur yz 250 1987 avec photo svp david asked on November 10, 2024

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I have a 23 TE 300 with braktek brakes. I would like to upgrade the rear so would I just need a new master cylinder a lever and caliper too? Ryan asked on June 11, 2024

Yes, this and the caliper will do the trick. The lever is optional.

answered on June 13, 2024 store manager

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what are the piston sizes for the yz 450 rear master cylinder. upgraded for more stopping not the more progressive model . Thanks john lundgren asked on August 18, 2023

13mm we have for that one

answered on August 19, 2023 store manager

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9mm 3/8 is the smallest for that model just have 11 and 13mm for better strength.

Boston Morse answered on March 13, 2025 store manager

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yes we have a 15% smaller piston available

Boston Morse answered on January 17, 2025 store manager

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comment kit installer sur yz 250 1987 avec photo svp david asked on November 10, 2024

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I have a 23 TE 300 with braktek brakes. I would like to upgrade the rear so would I just need a new master cylinder a lever and caliper too? Ryan asked on June 11, 2024

Yes, this and the caliper will do the trick. The lever is optional.

answered on June 13, 2024 store manager

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what are the piston sizes for the yz 450 rear master cylinder. upgraded for more stopping not the more progressive model . Thanks john lundgren asked on August 18, 2023

13mm we have for that one

answered on August 19, 2023 store manager

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FAQ

Is Shipping Included?

Yes, there is free shipping on all Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir‘s in the continental US.

Is fitment guaranteed?

Yes, when all options are selected for the Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir, 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 Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir 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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Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir

Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir

Other parts you might need...

Honda 2021 CRF450X Rear Brake Cylinder Upgrade:

What’s included with this Honda 2021 CRF450X Rear Brake Cylinder?

Compatibility/Fitment

Questions? Go to Q&A

1 review for Honda 2021 CRF450X Rear Brake Cylinder Upgrade: Master Cylinder Reservoir

Q & A

Q & A

Need help with installation? Get a hold of a live agent.