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Noy Q75
Roostin Away
Joined: 16 Nov 2007
Posts: 943
Location: Perth W.A.
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 Posted: Sat Dec 01, 2007 8:11 pm Post subject: Stoping issues |
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This is for my mate who has a bike and i can not work out what the hell is going on!!! we can go out for a ride then afer 10 minites of riding his rear brakes lock up and we have to crack off the bleed nipple to release the pressure then we can keep riding ?? any ideas (its one of those green bikes) 
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Dingo555
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Joined: 25 Sep 2007
Posts: 778
Location: Closer to the Qld coast
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| Posted: Sat Dec 01, 2007 9:10 pm Post subject: |
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when was the last time the fluid was completly changed ??
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Noy Q75
Roostin Away
Joined: 16 Nov 2007
Posts: 943
Location: Perth W.A.
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| Posted: Sat Dec 01, 2007 9:20 pm Post subject: |
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we did a full oil change the second time it did it.
_________________
Sponsors ,Cullys Yamaha,Pirtek Malaga
2x YFZ 450r "09" 2x 90 Raptor "09"2x 125Raptors "12"
N# 1 Aus Quad Nats Vets 2010
N# 1 at BSA-HD for 09,10,11
N# 2 W.A. State Clubman A 2010
N# 3 W.A. State Vets 2011
N# 1 W.A. State Vets 2012 |
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Noy Q75
Roostin Away
Joined: 16 Nov 2007
Posts: 943
Location: Perth W.A.
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| Posted: Sat Dec 01, 2007 9:36 pm Post subject: |
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thanks bdger. we have tryed that to .thats one of the things we looked at the first time it did it. i just carnt get my head around it.i thought he was riding the brakes so i took it for a ride and it did it to me to. 
_________________
Sponsors ,Cullys Yamaha,Pirtek Malaga
2x YFZ 450r "09" 2x 90 Raptor "09"2x 125Raptors "12"
N# 1 Aus Quad Nats Vets 2010
N# 1 at BSA-HD for 09,10,11
N# 2 W.A. State Clubman A 2010
N# 3 W.A. State Vets 2011
N# 1 W.A. State Vets 2012 |
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Quad
The Day Starts With OZATV !
Joined: 22 Oct 2006
Posts: 2773
Location: UP FRONT
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| Posted: Sat Dec 01, 2007 10:11 pm Post subject: ok |
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how about this ,if there is no free travel in the lever. EG LIKE THE CLUTCH LEVER .
The rear brake will start binding or stay on ,when this happens again ,see if you have any free travel in the foot lever.if so the piston is not going to full out distance to reless the pressure ,for the next brake stop.
YOU MAY HAVE TO ADJUST THE ROD BETWEEN THE PEDAL & MASTER CYLINDER, to make it free all the time.
QUESTION TO YOU is the brake pads good or bad ,meaning worn out or not. this may help |
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Noy Q75
Roostin Away
Joined: 16 Nov 2007
Posts: 943
Location: Perth W.A.
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| Posted: Sat Dec 01, 2007 10:53 pm Post subject: |
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Quad. i will check that out thanks not sure about the free play but dics and pads were ok but starting to stuff up now due to this issue.e.g. blue disc..
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Sponsors ,Cullys Yamaha,Pirtek Malaga
2x YFZ 450r "09" 2x 90 Raptor "09"2x 125Raptors "12"
N# 1 Aus Quad Nats Vets 2010
N# 1 at BSA-HD for 09,10,11
N# 2 W.A. State Clubman A 2010
N# 3 W.A. State Vets 2011
N# 1 W.A. State Vets 2012 |
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bullet
The Day Starts With OZATV !
Joined: 09 Sep 2006
Posts: 1518
Location: Middleton SA
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| Posted: Sat Dec 01, 2007 11:06 pm Post subject: |
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Quad is definitely right.
there is a little hole in the master cylinder called the compensating port. When the Master cylinder piston is fully returned (must have even one thou of push rod slack) and the pressure is off the fluid and the system breathes to the reservior.
Shorten the push rod a tad and you'll be done.
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greenhuman
Roostin Away
Joined: 12 Feb 2006
Posts: 980
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| Posted: Sun Dec 02, 2007 9:06 am Post subject: |
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| Slightly buckled disc. It is pumping up the brakes. |
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