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WEIYINGSI

Rear Brake Master Cylinder Replacement

  • Based on 273 reviews
Condition: New
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Availability: In Stock.
Fulfilled by Amazon
Arrives Oct 10 – Oct 11
Order within 14 hours and 11 minutes
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Features

  • Brand new master cylinder with built-in reservoir
  • Aftermartet Replacement Fits many Chinese 110cc 125cc 140cc Dirt Pit Bike Motorcycle
  • Be sure to bleed the remaining air from the brake system after installation
  • No instructions included.Professional installation is strongly recommended
  • Package Included:1 X ATV Brake Master Cylinder

Description

Provide a good experience for brave motorcycle enthusiasts, looking forward to your joining WEIYINGSI is concerned with the design, development and production of aftermarket parts for motorcycle. WEIYINGSI considers more on safety and practicability, pursuing to let all users enjoy the reliable products Providing an exceptional driving experience to our customers around the world

Manufacturer: ‎Wingsmoto


Brand: ‎WEIYINGSI


Item Weight: ‎7.6 ounces


Product Dimensions: ‎0.35 x 0.05 x 0.01 inches


Exterior: ‎Aluminum


Manufacturer Part Number: ‎JR3-046


Date First Available: December 27, 2016


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Oct 10 – Oct 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • Zip Pay in 4
  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Similar Products

Top Amazon Reviews

    • Works on SSR 125
Color: black
The seals on my original leaked so I got this. It fits great on my SSR 125 and is a great deal.
Reviewed in the United States on August 13, 2026 by Nico
    • Takes a long time to pressurize but works good
Color: black
Can’t beat it for the price. Builds pressure VERY slowly. Took about 20 times of pumping the brake, holding it down and burping the caliper before it got pressure. That’s just due to the very short stroke of the piston so don’t give up on it. If you are still having trouble try manually pushing back the brake piston with a screw driver while the system is closed, air likes to hide in these tiny calipers. Installed on a SSR 140, has no problem locking up the wheel at top speed (50 or so). ... show more
Reviewed in the United States on June 13, 2026 by Tom Dykstra
    • longer-style connecting rod
Color: black
Be aware that there seem to be 2 connecting rod lengths for these units. This one is over 4" and was too long for my bike. There is a shorter (<3") rod unit here: https://www.amazon.com/LOCOPOW-Cylinder-Coolster-50cc-125cc-dirtbike/dp/B093269C8H/
Reviewed in the United States on March 16, 2024 by jswap
    • Good buy
Color: black
Easy to install
Reviewed in the United States on July 26, 2026 by Mark A Wisenbaugh
    • Works
Color: black
Works well but moves such a tiny amount of fluid it is difficult to bleed air from the system. Fit my bike perfectly. Any brake fluid spilled on the finish will take the paint off. Would be better non painted. To bleed air I removed wheel caliper and held it higher than master. Finally bled out and pressure is good. Fit good on my Mini Chopper. ... show more
Reviewed in the United States on November 8, 2024 by Toesmack
    • Great fit and function
Color: black
It worked great on my SSR 125 pit bike
Reviewed in the United States on April 22, 2026 by Luis
    • Spend your money else where
Color: black
This master would not build pressure. It built just enough to bleed the system but would not build enough to move the caliber or even shoot out of the bleeder like a hydraulic system should. Would only trickle out of the bleeder screw.
Reviewed in the United States on June 16, 2026 by Avery G.
    • Fits Ssr 110
Review Image by chris hart
Fits ssr110 perfect. Same quality as OEM. Needed a master for the rear breaks after I broke my last one. Will work with both (over the top) style break pedal and under the peg style (as in picture). All bolts were able to be reused with zero modifications.
Reviewed in the United States on February 23, 2021 by chris hart

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