• Welcome to the new B.I.R.D. Forum. Please be sure to read the "New Member / New Registered ? Please Read" thread in the Coffee Shop. This contains some important information. To become a full member ( £5.90 a year ) simply click on your user name near the top on the right I hope you enjoy the new site ................ Jaws ( John )

Naturally de-linked brakes?

ChildoftheJago

Living in Polaradise
Club Sponsor
Out of interest, whilst bike was on it's centrestand I manually spun up the rear wheel and applied the brake pedal - worked fine. Tried it again and pulled brake lever.....and nothing. Absolutely no effect. Seems like the linked brakes are not working correctly.
I haven't tried spinning front wheel and applying brake pedal as no easy to do.
Brakes are all standard i.e. not de-linked, could it be faulty secondary master cylinder or PVC?
People ask me how I like the linked brakes, never found them a problem, maybe that's why!
Edit: oops, have found a full explanation of how brakes work, not a problem at all. Ignore
 
Last edited:

Jaws

Corporal CockUp
Staff member
Moderator
Club Sponsor
The rear brakes only come on with the front lever if the front wheel is turning.
The movement forces up the 2ndry master cylinder which then activates the rear outer pistons
Nothing happens until the front wheel is rotating
 

andyBeaker

Moderator
Staff member
Moderator
Club Sponsor
The rear brakes only come on with the front lever if the front wheel is turning.
The movement forces up the 2ndry master cylinder which then activates the rear outer pistons
Nothing happens until the front wheel is rotating

Perhaps Lumpy understands noww;;v
 

grant57

Registered User
Hi John

I thought the rear caliper pistons were only activated by the front brake when the forks were compressed and the valve on the left fork was then opened by fork compression. How would the wheel simply turning activate the valve?

Always uncomfortable to disagree with you as I am probably wrong!

Grant
 
Top