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Back brake is spongey. Dropped

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Kal-El
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PostPosted: 00:09 - 22 May 2015    Post subject: Back brake is spongey. Dropped Reply with quote

So yeah, took my new (20 year old) bandit out for a ride today.

Dropped it when I accidentally at like 2 mph, this mofo is so heavy, weighs a ton, I hear a bike isn't officially yours until you drop it anyways Very Happy

I was pressing the back brake but it wasn't pressing down, so I pressed it proper in and lost balance.

How do I fix it so it's not spongey anymore, I want a slight touch to activate the back brake for slow riding.
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Kal-El
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PostPosted: 06:45 - 22 May 2015    Post subject: Reply with quote

PaulFzs wrote:
try bleeding them


Will do. Just got to order some brake fluid. Thanks
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Benjums
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PostPosted: 06:55 - 22 May 2015    Post subject: Reply with quote

The rear brake on my bandit was soft as well, it worked but it felt like i had to put all my weight on it to get it to do something. To be honest though it probably saved me from locking the rear wheel up when I had to do an e stop once. I was told that most bandits are notoriously crap on the rear brake, don't know how true that is. It didn't change much when I put new pads in and bled the system either.
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andyscooter
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PostPosted: 07:42 - 22 May 2015    Post subject: Reply with quote

why do you neto order brake fluid

every motor factor ,Halfords ,most petrol stations and even supermarkets will keep it in stock
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Kal-El
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PostPosted: 07:43 - 22 May 2015    Post subject: Reply with quote

Benjums wrote:
The rear brake on my bandit was soft as well, it worked but it felt like i had to put all my weight on it to get it to do something. To be honest though it probably saved me from locking the rear wheel up when I had to do an e stop once. I was told that most bandits are notoriously crap on the rear brake, don't know how true that is. It didn't change much when I put new pads in and bled the system either.


Thanks for that. Will probably just leave it then.

What oil did you use for your bandit?

Also is your throttle hard to adjust? I have to apply some force to it to make it turn. Maybe it's how it is on bigger bikes not sure as on my old 125 I could use 2 fingers for the throttle.
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Kal-El
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PostPosted: 07:47 - 22 May 2015    Post subject: Reply with quote

andyscooter wrote:
why do you neto order brake fluid

every motor factor ,Halfords ,most petrol stations and even supermarkets will keep it in stock


Usually have to pay a premium on stuff bought locally as opposed to online. Might not order it now that Benjums said it doesn't make much of a difference.

Which fluid do you recommend anyways?
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Hefty
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PostPosted: 07:51 - 22 May 2015    Post subject: Reply with quote

This will sound like a stupid question, but are you sure your foot just wasn't on the pedal properly? Especially on a brand new bike, takes a few rides for your foot to remember exactly where it needs to be.. If your pushing the wrong part of the pedal it can feel like its not working at all. Unless of course you've tested it again since.. In which case aa said, bleeding is the way forward.
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Kal-El
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PostPosted: 08:01 - 22 May 2015    Post subject: Reply with quote

Hefty wrote:
This will sound like a stupid question, but are you sure your foot just wasn't on the pedal properly? Especially on a brand new bike, takes a few rides for your foot to remember exactly where it needs to be.. If your pushing the wrong part of the pedal it can feel like its not working at all. Unless of course you've tested it again since.. In which case aa said, bleeding is the way forward.


You might have a point, will notice where I'm pressing next time. I've read on the internet that the foot rest height can be adjusted so will try that. Might make it better.
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andyscooter
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PostPosted: 08:02 - 22 May 2015    Post subject: Reply with quote

Kal-El wrote:
andyscooter wrote:
why do you neto order brake fluid

every motor factor ,Halfords ,most petrol stations and even supermarkets will keep it in stock


Usually have to pay a premium on stuff bought locally as opposed to online. Might not order it now that Benjums said it doesn't make much of a difference.

Which fluid do you recommend anyways?


any as long as its dot 4
company called comma make most of the retail brands anyway
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Benjums
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PostPosted: 08:10 - 22 May 2015    Post subject: Reply with quote

I used dot 4 can't remember which make though. Don't get me wrong I'm not saying don't do it, it's worth a go just to see if it helps bring the brake to where you want it. At the end of the day it's only a bit of money and time doing it, nothing major and worth a try. I don't remember the throttle being that stiff on it though so maybe look into that as well. See if you can follow the throttle cable and find out if something is pinned against it causing it to be so tough.
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Rogerborg
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PostPosted: 10:21 - 22 May 2015    Post subject: Reply with quote

Kal-El wrote:
Usually have to pay a premium on stuff bought locally as opposed to online.

Pennies. Having working brakes will cost you less. Wink
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Codge
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PostPosted: 10:28 - 22 May 2015    Post subject: Reply with quote

used sintered pads on my rear brake, slight improvement Smile
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chris-red
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PostPosted: 10:30 - 22 May 2015    Post subject: Reply with quote

Kal-El wrote:

Usually have to pay a premium on stuff bought locally as opposed to online. Might not order it now that Benjums said it doesn't make much of a difference.


My local independant motor factors sells 250ml of DOT4 (more than enough to bleed all three calipers) for £2.99.
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XBIKER
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PostPosted: 00:14 - 23 May 2015    Post subject: Reply with quote

Kal-El wrote:
Benjums wrote:
The rear brake on my bandit was soft as well, it worked but it felt like i had to put all my weight on it to get it to do something. To be honest though it probably saved me from locking the rear wheel up when I had to do an e stop once. I was told that most bandits are notoriously crap on the rear brake, don't know how true that is. It didn't change much when I put new pads in and bled the system either.


Thanks for that. Will probably just leave it then.

What oil did you use for your bandit?

Also is your throttle hard to adjust? I have to apply some force to it to make it turn. Maybe it's how it is on bigger bikes not sure as on my old 125 I could use 2 fingers for the throttle.


If your 20 year old Bandit has been unused for long time then the throttle cable may need replaced or lubricating but that only usually puts off the inevitable replacement when you're off touring. Rolling Eyes
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Kal-El
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PostPosted: 13:10 - 23 May 2015    Post subject: Reply with quote

XBIKER wrote:

If your 20 year old Bandit has been unused for long time then the throttle cable may need replaced or lubricating but that only usually puts off the inevitable replacement when you're off touring. Rolling Eyes


Not sure what you mean by that? Are you saying I'm going to die if I go touring lol? Sorry didn't understand what you wrote.

The cable was a bit stuck it's OK now that I've pulled it. The actual cable isn't the issue, the throttle is just a bit harder than my 125 one was, dunno, will take a look at it. But it's probably best to keep it like that as it's more accurate, or I'll just whack it back one day forgetting it's a 600 and go into a wall lol.
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Slacker24seve...
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PostPosted: 19:05 - 23 May 2015    Post subject: Reply with quote

Codge wrote:
used sintered pads on my rear brake, slight improvement Smile


Unless you're on something long and low like a cruiser sintered pads on the rear are a waste of time.
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XBIKER
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PostPosted: 21:08 - 23 May 2015    Post subject: Reply with quote

Kal-El wrote:
XBIKER wrote:

If your 20 year old Bandit has been unused for long time then the throttle cable may need replaced or lubricating but that only usually puts off the inevitable replacement when you're off touring. Rolling Eyes


Not sure what you mean by that? Are you saying I'm going to die if I go touring lol? Sorry didn't understand what you wrote.

The cable was a bit stuck it's OK now that I've pulled it. The actual cable isn't the issue, the throttle is just a bit harder than my 125 one was, dunno, will take a look at it. But it's probably best to keep it like that as it's more accurate, or I'll just whack it back one day forgetting it's a 600 and go into a wall lol.


No, no, didn't think you were going to die just because of a gummed up and sticky throttle cable but I was suggesting that cables and such like tend to chose the most inopportune times to let go, such as when you are 400 miles away from home at midnight. Shocked

If you think there's a problem with the throttle cable then get it checked out but as you may have noticed, the throttle can be a bit heavier on the bigger bikes. Just saying you "have to apply some force to it to make it turn" suggested a more serious problem as I never noticed any significant difference between a new 125 Varadero and an old Honda CB500.

Keep it between the hedges. Smile
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The Wobbly Orange
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PostPosted: 21:46 - 23 May 2015    Post subject: Reply with quote

Check your pads make sure they are good and replace the fluid in the brake system and give it a good bleed. Considering it's an old bike the brake hoses may have expanded thus reducing pressure. Perhaps fresh hoses (braided if you think it's worth it) would help also.

It's a Bandit so the rear brake will always be a bit weak, even a bike like mine (2012 ZX-10R) doesn't exactly have the most aggressive of rear brakes. So long as your front brakes are good you are gravy.

Ride safe.
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