Master Cylinder Failure

[Old N' Grumpy]

One day when I hit the brakes on my 2014 nothing happened except the lever and foot brake went to the floor. Good thing I was just moving it and not riding!!! Had someone look at it and they determined that I need a master cylinder. So my question is should I spend the money on a complete unit or a rebuild kit??? Whatever the answer is where is the cheapest place to purchase? I don't want to spend a lot as I'm selling the bike so leaning towards the rebuild kit unless ya'll see some thing wrong with that route. Thanks!

 

[Mongler07]

Rebuilding them is easy
Chances are you just need to flush the fluid and bleed the system.
That brake fluid should be changed every 2 years max.

 

[Old N' Grumpy]

Rebuilding them is easy
Chances are you just need to flush the fluid and bleed the system.
That brake fluid should be changed every 2 years max.

Wasn’t rode in 1-1/2 to 2 years so if I remember right he said it was froze. Will probably go the rebuild route…thanks for your imput!

 

[TURBO200R4]

Wasn’t rode in 1-1/2 to 2 years so if I remember right he said it was froze. Will probably go the rebuild route…thanks for your imput!

I would try bleeding it first
Sometimes I just use my finger over the bleed hole to get it started sucking in the fluid

 

[atomsplitter]

If it's a 2014 model it's likely not integrated brakes unless it's ABS. Rebuilding master cylinders usually isn't necessary, but with a long layoff in usage may be the best option. The system is a basically hydraulic, meaning it's a piston pushing an incompressible fluid against another piston. The fluid type is a phosphate esther (probably DOT 3 or 4). Sometimes running fresh fluid thru the system can free up caliper pistons without taking anything apart. If I was doing the work I'd try the cheapest thing first, fresh fluid and bleeding. If that doesn't produce results, then rebuild kits, first for the master cylinder, then the calipers.

 

[Old N' Grumpy]

I would try bleeding it first
Sometimes I just use my finger over the bleed hole to get it started sucking in the fluid

Hey Herman...whats the fluid I buy???

 

[Old N' Grumpy]

If it's a 2014 model it's likely not integrated brakes unless it's ABS. Rebuilding master cylinders usually isn't necessary, but with a long layoff in usage may be the best option. The system is a basically hydraulic, meaning it's a piston pushing an incompressible fluid against another piston. The fluid type is a phosphate esther (probably DOT 3 or 4). Sometimes running fresh fluid thru the system can free up caliper pistons without taking anything apart. If I was doing the work I'd try the cheapest thing first, fresh fluid and bleeding. If that doesn't produce results, then rebuild kits, first for the master cylinder, then the calipers.

I'm pretty sure it is ABS. I will try the fresh fluid first. Thank you Sir!

 

[TURBO200R4]

Hey Herman...whats the fluid I buy???

My 07 uses dot 4 but I am not at the shop where my books have the info

 

[Mongler07]

Hey Herman...whats the fluid I buy???

any DOT4 or higher.

 

[Mongler07]

My 07 uses dot 4 but I am not at the shop where my books have the info

the # is just a rating for boil points and quality. any and all no silicone (dot 5) fluids will work. dot3 is not preferred due to its low boiling point.