rear brake pedal drops down


Information and questions on GL1800 Goldwings (2001-Present)
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mcbrown
Posts: 53
Joined: Wed Sep 07, 2011 11:14 am
Location: Atwell, Western Australia
Motorcycle: 2010 GL1800CADA
1978 GL1000 K3 sold
1975 Gl1000 K1 sold
Honda CB500/4 sold
Honda CB450 twin sold

rear brake pedal drops down

Postby mcbrown » Fri Jun 28, 2013 12:35 pm



I have a 2010 GL1800 Airbag model purchased in September 2011 which is approaching 18,000 km and recently has developed a problem with the rear brake pedal. If I am stopped at traffic lights on a hill with my foot on the brake pedal it slowly starts to go down whereby I have to release it and give it a pump to return it to a higher position to maintain the brake effect then it will either gradually go down again or just suddenly drop. It doesnt seem to happen if I also have the front hand brake applied at the same time. The Honda dealer checked it for the break recall at 6,000km and all was ok. Its booked for a service in 10 days time and I mentioned it to the service tech as it is still under warranty and he said he had not come across this problem before.

The fluid levels appear to be ok.

Has anyone else experienced a similar problem with the 1800's

Murray



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flash2002
Posts: 178
Joined: Mon Aug 30, 2010 6:38 pm
Location: Montreal, Canada
Motorcycle: gold wing 1800
2003

Re: rear brake pedal drops down

Postby flash2002 » Sat Jun 29, 2013 5:10 pm

There must be air in the brakes, get the dealer to bleed the brakes. If it still goes down, then you might have a leaking master piston seal.

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pau7220
Posts: 26
Joined: Sun Aug 09, 2009 12:49 pm
Location: Scranton, PA
Motorcycle: 2009 GL1800 Comfort / Nav / Audio XM / ABS

Re: rear brake pedal drops down

Postby pau7220 » Sat Jun 29, 2013 8:44 pm

If it was air in the system, it wouldn't drop. It would just be spongy.. You probably have a bad rear master cylinder. If you hold heavy pressure on it and it doesn't drop, it's that for sure.. Master cylinders usually leak internally with light pressure.

User avatar
mcbrown
Posts: 53
Joined: Wed Sep 07, 2011 11:14 am
Location: Atwell, Western Australia
Motorcycle: 2010 GL1800CADA
1978 GL1000 K3 sold
1975 Gl1000 K1 sold
Honda CB500/4 sold
Honda CB450 twin sold

Re: rear brake pedal drops down

Postby mcbrown » Sun Jun 30, 2013 4:32 am

Thank you pau7220 and flash2002 for your reply. I also suspect that its the master cylinder or something in the linked system as it doesnt happen when I also apply the front brake as well. Hopefully the Honda techs can sort it out.

Murray

User avatar
mcbrown
Posts: 53
Joined: Wed Sep 07, 2011 11:14 am
Location: Atwell, Western Australia
Motorcycle: 2010 GL1800CADA
1978 GL1000 K3 sold
1975 Gl1000 K1 sold
Honda CB500/4 sold
Honda CB450 twin sold

Re: rear brake pedal drops down

Postby mcbrown » Sat Jul 13, 2013 4:23 am

Update: The Honda service tech replaced the brake fluid and this appears to have corrected the brake issue. They stated that there did not appear to be any leaks in the system. Only time will tell if the issue will return.




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