Rear Brake!

Matthew04833 · 01-09-2008, 06:42 PM

I have a gy5 that has the rear brake that keeps locking up and we always have to drain to make it realease... Any solutions?

kens97sto171 · 01-09-2008, 07:23 PM

I am assuming you have a rear disk brake, since you mentioned draining it... The piston in the caliper is probably binding, you could try taking it apart and see why it is binding, could be defective piston, or the cyl wall could be scored, and it is catching on it. Might be easiest to just switch out the caliper.

Ken

Jim · 01-09-2008, 07:38 PM

The stopper bolt on the pedal might be adjusted too tightly?

katoranger · 01-10-2008, 08:32 AM

You need to adjust the plunger portion of the rear master cylinder out further.

I think you will need a 13mm wrench and a pliers to turn the shaft with.

I had the same problem and this is what helped. You can try the pedal adjustment bolt, but that didn't go far enough and I still had problems until I adjusted the master.

To release it if it sticks just use a 8mm wrench to crack the bleeder valve.

Allen

ejcycles · 01-10-2008, 08:40 AM

Allen is 100% correct.
You need to adjust the bolt between the rear brake pedal and the rear brake master cylinder to give it a little more free play.

What happens id the bolt is not letting the master cylinder piston come back all the way to let the brake fluid back into the cylinder.

fatboy250 · 01-10-2008, 10:52 AM

Quote:

Originally Posted by Matthew04833

I have a gy5 that has the rear brake that keeps locking up and we always have to drain to make it realease... Any solutions?

I did a write up on this in the prep thread

katoranger · 01-10-2008, 11:17 AM

This was a fairly common problem that seems to have an easy fix.

It should only take a few minutes unless yours is like fatboys and you have to remove part of the bolt.

Allen

01-09-2008, 06:42 PM	#1
Matthew04833 Join Date: Dec 2006 Posts: 45	Rear Brake! I have a gy5 that has the rear brake that keeps locking up and we always have to drain to make it realease... Any solutions?
	0

01-09-2008, 07:38 PM	#3
Jim Join Date: Mar 2007 Location: Abbotsford, BC, Canada Posts: 4,880	The stopper bolt on the pedal might be adjusted too tightly? __________________ "Be excellent to each other" "We are all human. Let's start to prove it!"
	0

01-10-2008, 08:32 AM	#4
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	You need to adjust the plunger portion of the rear master cylinder out further. I think you will need a 13mm wrench and a pliers to turn the shaft with. I had the same problem and this is what helped. You can try the pedal adjustment bolt, but that didn't go far enough and I still had problems until I adjusted the master. To release it if it sticks just use a 8mm wrench to crack the bleeder valve. Allen __________________ You meet the nicest people on a Honda Clone.
	0

01-10-2008, 08:40 AM	#5
ejcycles Join Date: Oct 2006 Location: 11481 State Route 44 Mantua, Ohio 44255 Posts: 1,112	Allen is 100% correct. You need to adjust the bolt between the rear brake pedal and the rear brake master cylinder to give it a little more free play. What happens id the bolt is not letting the master cylinder piston come back all the way to let the brake fluid back into the cylinder. __________________ Thanks, Bruce @ Endless Journey Cycles "Phone Calls Only" ~330-274-0098~ Hours: Tue.-Fri. 10:00-6:00 Sat. 10:00-4:00 EST. Dealer for: Lifan, Crossrunner ATVs. http://www.endlessjourneycycles.net
	0

01-10-2008, 11:17 AM	#7
katoranger Join Date: May 2007 Location: Altamont, Kansas Posts: 15,103	This was a fairly common problem that seems to have an easy fix. It should only take a few minutes unless yours is like fatboys and you have to remove part of the bolt. Allen __________________ You meet the nicest people on a Honda Clone.
	0

01-09-2008, 07:23 PM	#2
kens97sto171 Join Date: Mar 2007 Posts: 193	I am assuming you have a rear disk brake, since you mentioned draining it... The piston in the caliper is probably binding, you could try taking it apart and see why it is binding, could be defective piston, or the cyl wall could be scored, and it is catching on it. Might be easiest to just switch out the caliper. Ken
	0