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Replacement front discs for twincam

Posted: Wed Jun 19, 2024 1:05 pm
by MarkW
Has anyone got any experience with Galfer replacement discs?

Have been thinking for a while now about changing out my originals to cure the annoying rattle from particularly the right side. There's no cause for concern with regard to disc thickness, but the non-replaceable bobbins have for some time allowing quite a bit of both lateral and rotational movement. Brakes work fine but the noise, especially over bumps at low speed, is driving me nuts. Motorworks don't seem to list the standard Brembos and now seem to only offer the "serie o" upgrade at £150 a pop, but a set of Galfers including bobbins is available on Ebay for £200 with free shipping.

The bobbins on my originals appear to be riveted on and thus not replaceable - but is there a workaround that I am perhaps unaware of?

The bike is a 2012 twincam model.

Re: Replacement front discs for twincam

Posted: Wed Jun 19, 2024 4:37 pm
by Sullivj
How many miles have you done on the existing discs MarkW?

I'm sure you know that they are supposed to 'float' slightly. I have a 2012, but I don't hear mine knocking.

Re: Replacement front discs for twincam

Posted: Wed Jun 19, 2024 5:47 pm
by Stu
I had galfer discs on the TL1000s

Fantastic stopping power and quality

Re: Replacement front discs for twincam

Posted: Thu Jun 20, 2024 7:21 pm
by David.
MarkW wrote: Wed Jun 19, 2024 1:05 pmThe bobbins on my originals appear to be riveted on and thus not replaceable but is there a workaround that I am perhaps unaware of.
The Disc Doctor, https://www.thediscdoctor.co.uk/Bobbins.htm may be able to help.

"We offer a full range of replacement Disc Bobbins, CNC Machined in a wide range of sizes to fit all bikes.
Also Oversized Bobbins to remove excessive play in worn Discs."

Re: Replacement front discs for twincam

Posted: Fri Jun 21, 2024 6:14 pm
by MarkW
Sullivj wrote: Wed Jun 19, 2024 4:37 pm How many miles have you done on the existing discs MarkW?

I'm sure you know that they are supposed to 'float' slightly. I have a 2012, but I don't hear mine knocking.
The bike has done just over 60k. I'm aware of the floating nature on these, having come from many years on an r1100rt, and I'm not anxious about either performance or safety as they are - it's the low speed clonking over speed bumps and the like that just annoys. I'm funny like that ;)

Re: Replacement front discs for twincam

Posted: Fri Jun 21, 2024 6:18 pm
by MarkW
David. wrote: Thu Jun 20, 2024 7:21 pm The Disc Doctor, https://www.thediscdoctor.co.uk/Bobbins.htm may be able to help.

"We offer a full range of replacement Disc Bobbins, CNC Machined in a wide range of sizes to fit all bikes.
Also Oversized Bobbins to remove excessive play in worn Discs."
That's interesting David, thank you, will give him a shout when I'm back from holiday week after next.

Re: Replacement front discs for twincam

Posted: Fri Jun 21, 2024 6:25 pm
by MarkW
Thanks for the replies chaps, most helpful.

The bike's due it's MOT in a couple of weeks, and this is the only thing that is any kind of concern. I've been picked up before on the same issue with my previous bike - 1100RT - and got an advisory for "excessive rotational play". It really does depend on what mood my guy is in though. When i got the advisory I ignored it, and it was never mentioned again despite me not making any changes in the following 2 or 3 years :roll:

Re: Replacement front discs for twincam

Posted: Sat Jun 22, 2024 1:36 pm
by Doctor T
Am sure I fitted EBC disc to the rear. I had Galfer pads on my Tiger 1050 and hated the feel. Changed to EBC HH. Transformed the braking

Re: Replacement front discs for twincam

Posted: Sun Jun 23, 2024 10:30 pm
by Loopers
You were lucky you only got an advisory, side to side play is allowable but rotational wear is actually a reason for failure as technically it effects the performance of the brakes.
Sorry I don't have any opinion on the Galfor discs as the only ones I have knowledge of are the wave type and wasn't interested in them but that was a couple of years ago.
I did fit EBC replacements to my ST1300 Pan and they were a good replacement, performed well and were easy enough to fit.