Rated 4 out of 5 stars.
Having rear brake problems on your small ATV or dirt bike?
This GOOFIT brake master cylinder is a common replacement part.
It's designed for a wide range of Chinese-made pit bikes, dirt bikes, and ATVs with engines from 50cc up to 125cc.
It comes with the integrated fluid reservoir already attached.
The unit converts the pressure from your foot pedal into hydraulic force to activate the rear brake caliper, giving you reliable stopping power.
It's made from quality metal with a rubber diaphragm and includes the necessary tubing.
The mounting hole distance is 45mm (about 1.77 inches) – be sure to check this measurement and the overall shape against your old, broken unit to ensure a proper fit before ordering.
Installation is straightforward if you're familiar with basic brake work (bleeding the system will be necessary).
A durable, affordable part to get your bike's rear brake working safely again.
We're here to help if you have any questions about fitment or installation.
