front Master cylinder not working can it be bled

 

They usually don't get bled like you would on a car, you could bleed the whole system but if the MC is stuffed then it needs replacing or rebuilding.

 

it's brand new from biker choice

 

Prime it with new fluid and pump it using your fingers to open and close the outlet hole,.... sometimes they come with machine/storeage oils that first need cleaning with brake cleaning fluid as storeage oil can preventthe brake fluid going to where it needs to be

 

On my 79 super glide, dual calipers is always a pain and takes awhile after a fluid change.

 

Been a run on junk masters lately from china

 

Try bleeding it the usual way and if no luck there, use a vacuum pump. If still having problems, be sure the resevior is full of brake fluid and use a bunge cord or similar and tie the brake lever to the handlebar and let it sit over night. That will allow air to escape to the top and and hopefully get it to a point you have some lever.

If still no luck, try bleeding the cylinder off the bike in a vise using your finger over the fitting where the line connects when the lever is released.

If not, the cylinder may be problematic.

Paul

 

You mean there`s been a run on junk master cylinders ever since they started importing them from China.

 

There certainly is a lot of junk out there. I vacuum bleed and on front I do the bungee or pull-tie overnight.
Just curious, when you pull the lever and release can you see a swirl or bubbles when the lever is released?