CBF1000

CBF1000 => Brakes and ABS/CBS => Topic started by: smooth operator on 17 June, 2018, 02:59:39 PM

Title: Weak Brake and fork upgrades
Post by: smooth operator on 17 June, 2018, 02:59:39 PM
Hi,

Recently bought a 2010 CBF1000GT and love it but the brakes are not the best by a long way. I have replaced all brake pads with EBC 388 HH and they made a slight difference, the same brake pads I put on my CB1000R which almost put me over the handle bars straight away, but I am still not happy with them at all. I travel 99.9% with the wife so the brakes are paramount, as they should be regardless of one or two up.
I had the calipers off and they are all working freely. I know the disc"s are only 296 mm but they should be way better than what they are considering it's classed as a mini Pan Euro, a continent mile muncher..
Has any body changed front forks or done anything radical to upgrade the front end.

Cheers

Tommy
Title: Re: Weak Brake and fork upgrades
Post by: Silverdart on 17 June, 2018, 04:07:52 PM
I've not done anything structural to my bike.

I, too, felt that the brakes on my Biffer didn't have enough "bite" but I think that's simply a function of the ABS. Grabbing a mittful of front brake in a bike without ABS should be enough to throw you over the bars like you mentioned, but of course ABS doesn't do that. It took me a good season to get used to that (slow learner, I guess) but once I got a grip on working with ABS I became quite comfortable with it.

All that said, I very seldom travel two-up. Best I can suggest at this point is to spend some time two-up in a parking lot somewhere and practice hard braking maneuvers.

Sorry I couldn't be more help.
Title: Re: Weak Brake and fork upgrades
Post by: jm2 on 17 June, 2018, 04:16:34 PM
Given the above already, and assuming you are not expecting racing performance brakes, I'd be doing the following;

Overhaul the calipers (fully).
Flush new fluid through (empty the masters and fill afresh).
Cleanout the bobbins (spin with brake/carb cleaner).
Check the lines (for any bulging under max pressure).

And expect some decent gains.
Title: Re: Weak Brake and fork upgrades
Post by: Rich M on 18 June, 2018, 10:51:16 AM
*Originally Posted by jm2 [+]
Given the above already, and assuming you are not expecting racing performance brakes, I'd be doing the following;

Overhaul the calipers (fully).
Flush new fluid through (empty the masters and fill afresh).
Cleanout the bobbins (spin with brake/carb cleaner).
Check the lines (for any bulging under max pressure).

And expect some decent gains.

As jm2 says, some maintenance checks should improve your brakes. I ride 2 up or fully loaded quite a bit and can't fault the braking. If it wasn't for abs I could probably stand it on its nose. Compared to my zzr these are very good brakes.

Good luck
Title: Re: Weak Brake and fork upgrades
Post by: smooth operator on 18 June, 2018, 11:30:49 AM
Hi Rich,

Thanks for the reply, looks like I definitely have an issue somewhere along the line.
Is your machine totally standard, even the brake pads?
Title: Re: Weak Brake and fork upgrades
Post by: Rich M on 18 June, 2018, 11:41:22 AM
*Originally Posted by smooth operator [+]
Hi Rich,

Thanks for the reply, looks like I definitely have an issue somewhere along the line.
Is your machine totally standard, even the brake pads?

Brake wise mine is completely standard.
I do have the full luggage kit fitted and still have no problem braking. A two finger pull of the brake lever gets instant braking, even 2 up with luggage. My zzr has a reputation for poor braking. A slight delay between pulling the lever and anything happening.

6500 miles in 12 months and never a concern about stopping.

Rich
Title: Re: Weak Brake and fork upgrades
Post by: smooth operator on 18 June, 2018, 12:52:53 PM
Hi Rich,

I obviously have an issue and when I get back into the country I will get right onto it. I did an 1100 m trip around Scotland at the start of June and always had to remind myself " The brakes are s**t " so always on the alert when getting nearer traffic or town work. I am wondering if I disconnected the ABS by pulling the fuse, this way I could eliminate all the business end parts?? Worth a try... 

Tommy
Title: Re: Weak Brake and fork upgrades
Post by: Rich M on 18 June, 2018, 01:04:44 PM
*Originally Posted by smooth operator [+]
Hi Rich,

I obviously have an issue and when I get back into the country I will get right onto it. I did an 1100 m trip around Scotland at the start of June and always had to remind myself " The brakes are s**t " so always on the alert when getting nearer traffic or town work. I am wondering if I disconnected the ABS by pulling the fuse, this way I could eliminate all the business end parts?? Worth a try... 

Tommy

As jm2 says, start with basic (and free) checks. Good luck
Title: Re: Weak Brake and fork upgrades
Post by: smooth operator on 18 June, 2018, 01:07:21 PM
Cheers, I'll let you know how I get on....
Title: Re: Weak Brake and fork upgrades
Post by: Ianrobbo1 on 18 June, 2018, 06:15:44 PM
*Originally Posted by smooth operator [+]
Cheers, I'll let you know how I get on....

Can I have your boots, if it all goes wrong!! :164: :008: :008: :008:
Title: Re: Weak Brake and fork upgrades
Post by: jm2 on 18 June, 2018, 11:39:55 PM
Exactly.
And as the boots are taken, what size is your other gear ?

PLEASE, leave the ABS alone  - it may actually help if you manage to grab a whole lot of brakes and they kick in and I can't imagine (at this time of night) how it'll improve anything by disabling it.

THEN overhaul the brakes or get someone you trust to do it.

PLUS, if they are that bad how about not riding it any further until sorted (by the sounds of it they aren't getting better by themselves).  The biffer is a weighty bike and can reach some very decent speeds, decent brakes are somewhat essential.
Title: Re: Weak Brake and fork upgrades
Post by: smooth operator on 19 June, 2018, 09:27:31 AM
Course you can mate, but you gotta do the brakes too :046: :046: :046:
Title: Re: Weak Brake and fork upgrades
Post by: smooth operator on 19 June, 2018, 09:33:23 AM
JM2, I was only disabling the brakes for a test ride to try to a process of elimination.
If ABS disabled and brakes are good during test ride, I know all my working parts are good.
As for the other gear I'll let you know...
The brakes aren't that bad, ie unsafe to ride, they aren't as good as they should be......... well, in my opinion.
I have arranged for the bike to be professionally assessed when I am home... :047: :047: :047:
Title: Re: Weak Brake and fork upgrades
Post by: jm2 on 20 June, 2018, 11:29:45 AM
I think a professional assessment is indeed required.
Title: Re: Weak Brake and fork upgrades
Post by: Ianrobbo1 on 20 June, 2018, 12:20:14 PM
*Originally Posted by jm2 [+]
I think a professional assessment is indeed required.

I concur, if only to assure you that they are working correctly.  :027:
Title: Re: Weak Brake and fork upgrades
Post by: smooth operator on 20 June, 2018, 05:00:56 PM
Just a small process of elimination Ianrobbo1  :031: :031: :031:
Title: Re: Weak Brake and fork upgrades
Post by: davyayr on 30 August, 2018, 09:48:45 PM
Any update on this one..

I had the same thought when I first bought my 2011 CBF. Brakes always worked but I was a bit unsure how good, as I'm a newbie.

Asked a mate with years biking under his belt to try her out.

He suggested a couple of things, given that bike brakes are open to all the road crap that gets sprayed up on them.

After a strip down and a good clean of discs with break cleaner, and spraying the pads and a roughen up with 40 grit, they were  definitely better, after a quick bedding in.

I do the same when I adjust, clean and lube the chain.
Title: Re: Weak Brake and fork upgrades
Post by: Leofric on 28 September, 2018, 11:18:50 PM
davyayr , sounds like you clean the chain with brake cleaner and roughen up with 40 grit !
Title: Re: Weak Brake and fork upgrades
Post by: Scott_rider on 01 October, 2018, 09:15:15 AM
I also struggled a bit with the lack of 'bite' with the brakes on the Biffer when I got it in January this year but I've now done about 7,000 miles on it and I'm used to it. I changed the pads to EBC 388 and that helped but it was the first time I'd had a bike with linked brakes/ABS and I found that a small adjustment to applying the brakes with just a touch of rear brake at all times makes a big difference and they bite well enough using that technique (at times I still give it a handful of front brake only and get that sinking feeling that they aren't going to pull me up quickly enough :005:). Others with more experience of the Biffer might be able to advise more but I think it's definitely a bike that benefits from using both brakes, alien as that seems when you come to it from sportsbikes etc.

I also changed the fork oil in one fork leg (as the fork seal was weeping) and that made a HUGE difference to everything....I'd recommend changing the fork oil if you don't know the serice history.
Title: Re: Weak Brake and fork upgrades
Post by: geoffdl99bt on 03 October, 2018, 03:49:54 PM
Im sure I read in the manual(as you do) that you need to apply both brakes to get the full effect its something to do with the linked system operating a third piston when both brakes are applied. Or I may have been pissed and made that up
Title: Re: Weak Brake and fork upgrades
Post by: Scott_rider on 04 October, 2018, 11:33:43 AM
*Originally Posted by geoffdl99bt [+]
Im sure I read in the manual(as you do) that you need to apply both brakes to get the full effect its something to do with the linked system operating a third piston when both brakes are applied. Or I may have been pissed and made that up

You weren't pissed!  That is correct, there is a third piston :028:. And I think the rear brake has an extra piston as well on the ABS model.
Title: Re: Weak Brake and fork upgrades
Post by: geoffdl99bt on 04 October, 2018, 02:21:19 PM
Thank God for that
I'll have another pint then
 :008: