Big R 508

okay heres the deal , i just bought it from someone and just put on yesterday rode for lil bit then all of suddenly it gets locked up and being hard. wont move my bike when i put in netural so i had to bleed it again so it gets soft again perfect ...then again rode for lil bit it gets hard again. any tip that master might be no good ?


thanks

whauburger

try switchin it out with the 1 of ur fischer price 3wheeler and see if helps

50slut

is it a dual caliper setup? wut kinda master cylinder is it?
your caliper could be bad
ive seen master cylinders go bad and do the same thing

old man roger

check three things rich

1- make sure your res isn't over filled because when the brake fluid gets hot it expands and can creat pressure in the system and that will lock up your brake..
2- some times on gsxr masters you need to file down the little pin that the lever pushes on
3-make sure if you are running the stock caliper that the slides are clean and lubed so the caliper moves freely

Steven Palmer

yea he knows whats up above , id say its probably boiling your fluid or gettin hott and expanding jamin up. i had that problem with my front brakes id sit there for a while and let it cool down and it free up does yours do that ? what kinda fluid you run ?

punishmentcycle

sounds like you have a banjo that is too long

Jt321

is it a stock lever on there? Or is it a cheap aftermarket lever? If its aftermarket you prob gotta grind down the pin as stated by omr.

Big R 508

thanks , i ll check into that.



punisher ....it came with it i dont know if he ever change it but i ll ask kiprocket.

kipROCKet

Yo bro, that is an aftermarket lever on it from parts unlimited. Never had any problems with it ? Used it as a HB and a front master

Big R 508

actually i got new lever from ebay ....well obviously i got the package from china but it says Delaware so i m kinda confused its chinese writing anyhoo thats where i got from ebay.

crashtest 750

Make sure that you are using dot 4 or 5 fluid. make sure the brake line is not kinked anywhere.

Big R 508

oh and went to the spot for couple of hours....had to bleed two more time then after that didnt come up so i assume its all good for now.

Big R 508

yea i use shitty prestone dot 4 but i rather to have motul if i spelled it correct lol

MikeM

maybe the guy didnt really ship it

Vern

I had my gf crash on my R1, I put an F4i lever on the front master and it jammed the front brakes. The master is really touchy if you don't have the right lever or if you don't shave it like OMR said it will stick. We learned the hard way.

zride

sounds like your relief port in your master cylinder could be clogged. Lok in your master resivior and see if there are two holes the larger one is your supply port and the smaller is the relief. If it is small enough and gets clogged it will keep fluid from flowing back to relieve pressure when you release the lever. therefore built up pressure stays built ut ...resulting in a locked brake system.. Check it out. Could be wrond but something to look into! Take Care