Rear brake issues on my 2019 Interceptor

John in Texas

Well travelled
Location
Granbury, Texas
My rear brake on my bike doesn't work. I have nothing. So, a friend and I proceeded to bleed the brake. We were getting all sorts of air out of the system But no matter what we did the pedal would not firm up. It isn't leaking. So, the questions are 1) where is the air coming from and 2) has anyone else had this issue?

Also, has anyone had problems with their ignition switch? I have to jiggle it for it to work.
 

Alan F.

Well travelled
Last summer I noticed the rear brake on my 20 Interceptor was very weak, last fall I bled thru several reserviors of fresh fluid and without so much air in there the pedal firmed up nicely.
I had no leaks or fluid loss of any kind either, but bleeding brakes is simple, regular maintenance.

Ignition switches have been an issue for many, replacement lock sets are available.
 

John in Texas

Well travelled
Location
Granbury, Texas
Well, it looks like I will go back and bleed the brakes again and again if needed. I was amazed at how much air was in the system when we bled it yesterday.
It seemed to firm up and then nothing. The master cylinder is moving the fluid but doesn't seem to want to hold, like it was by-passing.
 

Alan F.

Well travelled
My rear brake on my bike doesn't work. I have nothing. So, a friend and I proceeded to bleed the brake. We were getting all sorts of air out of the system But no matter what we did the pedal would not firm up. It isn't leaking. So, the questions are 1) where is the air coming from and 2) has anyone else had this issue?

Also, has anyone had problems with their ignition switch? I have to jiggle it for it to work.
John how many miles are on your bike?
Do you use your rear brake much?
Just curious about m/c wear.
 

Scrapyard Sorcerer

Finally made it
Location
Lincoln
To add to this, I started loosing my rear brake this week. So I popped new Brembo red pads in, no change. I put it down to salty,icy snowy roads I travel. Today it's sunny here in Lincolnshire, so I've bled the system. The rear fluid definitely looks a different colour to the fluid in the front. There is something in the rear reservoir, see the cotton bud image. The flush through was still coming out redder than the top up. I flushed about a pint. There was some contamination in the bleed out reservoir at the end. Took about 2 pints for the exiting fluid to look the same colour. So something is happening with rearbrakes? Mine is a 2022, 5000 miles, used in all weathers. I've ordered a new rear caliper, I intend to swap it and tear down the old one. Though I'm suspecting the fluid reservoir.
 

Attachments

Dabrakeman

Well travelled
Location
Michigan, USA
Its a closed system but for the reservoir itself. When the brake is applied there will be some lowering of the fluid level in the reservoir that is compensated with air through the vented cap. Normally this shouldn't be a problem but maybe between the design, location of this reservoir at times some contamination is getting pulled in. I'll admit I haven't yet even taken the cap off my reservoir to see its construction but most reservoir caps have a diaphragm with a slit so that during applies the air volume change stays on top of the diaphragm for the most part and the slit can do slower compensation with brake wear. Maybe there needs to be some splash protection around the reservoir.
 

John in Texas

Well travelled
Location
Granbury, Texas
John how many miles are on your bike?
Do you use your rear brake much?
Just curious about m/c wear.
I have only about 9K on the bike. Been watching YouTube videos about bleeding the brakes. Decided to buy a vacuum brake bleeder. That should be here in a few days. In the meantime, I will break out the Commando and ride that.
Thanks to everyone who took the time to give me advise on this issue.
 

2LZ

Well travelled
Location
Volcano, CA
Mine isn't bad but it's definitely not good. I use it rarely though.
There's another thread somewhere on this and the end result (or popular opinion) was switch out the plastic reservoir for a metal one. I have one on the bench ready to go. Just need some warmer weather. I bought this one.
 

2LZ

Well travelled
Location
Volcano, CA
I have only about 9K on the bike. Been watching YouTube videos about bleeding the brakes. Decided to buy a vacuum brake bleeder. That should be here in a few days. In the meantime, I will break out the Commando and ride that.
Thanks to everyone who took the time to give me advise on this issue.
Commando!? Please post some pics in the Garage forum for us vintage Brit bike guys to salivate over! :p
 

2LZ

Well travelled
Location
Volcano, CA
You live in Volcano? I was at the 92 Norton Rally at Lake Tahoe and took a few back roads and ended up there. Had a nice lunch as I remember.
You bet! Population 103! ...and yes. The food is great.You probably ate at the Country Store. I just did my Superbowl there.
Thank you for posting your bikes in the Garage forum. I'm not going to sleep tonight. o_O
 

John in Texas

Well travelled
Location
Granbury, Texas
You bet! Population 103! ...and yes. The food is great.You probably ate at the Country Store. I just did my Superbowl there.
Thank you for posting your bikes in the Garage forum. I'm not going to sleep tonight. o_O
Yes, it was at the Country Store that I ate. That was one hell of a game that's for sure.
 

fghog

Total noob
Location
Canada
The rear brake on my 2019 Int650 has been underwhelming. A pad replacement didn’t fix things and it wasn’t until a third brake bleed where I ran through a complete bottle of brake fluid that things finally improved. A massive amount of crud was flushed out on the third attempt and the peddle pressure is now firm. We’ll see how things work once the snow is gone. It's an easy job to do and something I check on a regular basis (before I put my helmet on).
 

John in Texas

Well travelled
Location
Granbury, Texas
The rear brake on my 2019 Int650 has been underwhelming. A pad replacement didn’t fix things and it wasn’t until a third brake bleed where I ran through a complete bottle of brake fluid that things finally improved. A massive amount of crud was flushed out on the third attempt and the peddle pressure is now firm. We’ll see how things work once the snow is gone. It's an easy job to do and something I check on a regular basis (before I put my helmet on).
Keep us posted if you would. I have a vacuum brake bleeder on order, and I hope it helps with my issue.
 

jadorff

Well travelled
try preasuri
Well, it looks like I will go back and bleed the brakes again and again if needed. I was amazed at how much air was in the system when we bled it yesterday.
It seemed to firm up and then nothing. The master cylinder is moving the fluid but doesn't seem to want to hold, like it was by-passing.
try pressure bleeding ,another trick I learnt on the triumph sight hang something on the brake pedal over night to keep the brake on (bleed nipple closed) and by morning the air is gone, dont know how but they say it works . worth a try
 

Woodstock

Well travelled
Location
Woodstock, NY
try preasuri
try pressure bleeding ,another trick I learnt on the triumph sight hang something on the brake pedal over night to keep the brake on (bleed nipple closed) and by morning the air is gone, dont know how but they say it works . worth a try
I'll do this anyway to see if makes any difference.
 
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