Broken front brake clamp - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 15 (permalink) Old 04-20-2019, 10:20 AM Thread Starter
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Broken front brake clamp

I was finished adjusting the front brake lever angle so I tightened the clamp bolts carefully to 10, then 12, then 15 Nm as per manual.

Shortly after I hear a 'crack' and the clamp has broken in two! As you can see it's that kind of crappy alloy that 'breaks', but I did not over tightened it for sure.


I am very disappointed because spring just started and now it'll take 10 days to get the part from where I live.

Anyway here's my questions: checking Fowlers parts I can only find part T2025450 which is for the clutch. But of course the clamp itself i.e. the only part I need from the assembly is the same for both levers (right?).
Also, apparently I have to order the entire assembly? (Even though it is less than 20 euro... which seems strange!) when I only need the clamp..?



Would you try to fix this with epoxy so I can ride the bike while waiting for the part?


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Last edited by Lpar; 04-20-2019 at 10:22 AM.
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post #2 of 15 (permalink) Old 04-20-2019, 12:55 PM
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I cant answer your question and Ill probably get flamed for saying this... But Yes...you obviously overtightend it... Torque wrenches are for head bolts and thays about it IMO... Torque values are not written in stone and are not some kind of black and white law... There are so many factors going into the forging/casting of metal parts and fasteners ... If your going to wrench on your bike learn to go by feel and not some number in a book. You'll snap fewer bolts and breake fewer cases...

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Not a rant at you OP just a cautionary word of advise to any who overly rely on a Torque Wrench... Now flam away!

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post #3 of 15 (permalink) Old 04-20-2019, 01:39 PM Thread Starter
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Psy you are certainly right, I clearly shouldn't have used a torque wrench at all. I have tightened those bolts many times and always using a normal ratchet wrench. Today I thought to do things properly (!).

It's funny that it cracked almost a minute after I was done. And that the other bracket, also tightened to 15Nm, didn't crack.

Anyway I've found the part numbers which are T2025450 (clutch) & T2025411 (brake). So I've already ordered the T2025411 (which anyway, in my hands, looks identical to the clutch side, T2025450).

This joke has cost me 43 euro and a sunny Easter weekend on a bicycle.

TORs, SAI/O2/snorkel removed, TTP Airbox Cover w/DNA filter, TTP Tune#1, Triumph windshields, G2 Throttle Tamer, NH Low-UK bar, SW-Motech Footpegs, Gammatronix Battery Monitor, Triumph handguards, Oxford heated grips, Denali SoundBomb + more ;)
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post #4 of 15 (permalink) Old 04-20-2019, 01:40 PM
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I'd be real concerned about gluing those pieces together. Remember they are your main brake. I know the riding season has just begun but better to be safe that sorry.
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post #5 of 15 (permalink) Old 04-20-2019, 02:00 PM Thread Starter
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I was thinking to swap the left bracket with the right one. So the glued one would go on the clutch side. They look exactly the same (unless the mirrors have opposite threads? haven't checked that. They have two different part numbers though).

TORs, SAI/O2/snorkel removed, TTP Airbox Cover w/DNA filter, TTP Tune#1, Triumph windshields, G2 Throttle Tamer, NH Low-UK bar, SW-Motech Footpegs, Gammatronix Battery Monitor, Triumph handguards, Oxford heated grips, Denali SoundBomb + more ;)
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post #6 of 15 (permalink) Old 04-20-2019, 03:07 PM
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Nope. No glue. Dont do that. I dont even think that crappy metal can be welded, i was barely able to weld up the clutch lever when it broke..
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post #7 of 15 (permalink) Old 04-20-2019, 03:54 PM
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Epoxy doesn't hold metal or alu particularly well and in that application it would need to hold a lot of tensional force ....would not hold any real force there. Would need to be wrapped in fiberglass or carbon fiber before having any proper strength.

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post #8 of 15 (permalink) Old 04-20-2019, 04:31 PM
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Maybe a steel or aluminum strap to bridge from one bolt to the other (with holes drilled on each end for the bolts) would get you by for a few days... Not epoxy.
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post #9 of 15 (permalink) Old 04-20-2019, 10:42 PM
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No glue. Get a new part and take it easy installing it.

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post #10 of 15 (permalink) Old 04-21-2019, 07:48 AM
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Quote:
Originally Posted by Lpar View Post
As you can see it's that kind of crappy alloy that 'breaks'

It's made of Chinesium... Lots more examples here:

https://www.reddit.com/r/chinesium
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