Spring damage

[Blue_SV650S]

Ok, I had to cut the springs out of my old set of forks as they were that bent! ... I tried to be as careful as possible, but unfortunately I did nick one of the springs in 2 places ...

From what you can see, do you think it will cause any problems??

nick 1
http://i208.photobucket.com/albums/bb319/blue_sv650s/spring1.jpg

nick 2


http://i208.photobucket.com/albums/bb319/blue_sv650s/spring2.jpg

[husky03]

wouldn't chance that one mate-you'll know better than most "what could happen" if the front end went on you(meaning with your track experience).
husky

[tomjones2]

Is it worth the risk, how much would they cost to replace?

[yorkie_chris]

Well there will definately be stress concentration around the cuts, which could lead to the springs work hardening and snapping, which would not be good.

Also that looks a lot like an angle grinder cut, in which case the heat produced could have caused the steel to temper further, again leading to risk of fracture, or simply them sagging to below useable length.

[Keith1983]

I would definitely not chance that, I work in engineering and although a small nick or chip may seem insignificant it can manifest itself in a break or fracture with relatively small forces applied.

[Blue_SV650S]

Ok, so I won't use that one ... I managed to get the other one out without injury .... so i only need one stock curvy spring ... anyone got one they don't want?!?!? :)

[21QUEST]

Blue, got PM. Got a pair. P+P plus donation(you can do that yourself) for the '.org' .


Cheers
Ben

[tactcom7]

If the damage is less than 10% of the thickness of the spring after you have blended out the nick to reduce 'stress-raisers' you should be o.k, if not then replace. s'good enough rule for helicopters...!

[Warthog]

Er, same happened to me when I swapped bent forks, I've been riding for 9 months now with no problems on springs with one nick like your first one! Oh well! Seems ok for me. :)

[Blue_SV650S]

Blue, got PM. Got a pair. P+P plus donation(you can do that yourself) for the '.org' .


Cheers
Ben


Thankyou for your kind offer, but you know what ... I think I am going to run it ...

I mean what would happen if it failed/snapped!?!? … as the springs have nowhere to go, surely it’d make little difference if it was in one bit or two? :scratch:

I can see it might spiral up over time, but not that it would suddenly lock or collapse??? :scratch:

[Stu]

As you say, would only collapse by the distance between coils, on one fork at a time. so would you know it was broken before it gets worse (if it can get worse?)

[Blue_SV650S]

As you say, would only collapse by the distance between coils, on one fork at a time. so would you know it was broken before it gets worse (if it can get worse?)

BOTH bits of damage are on the same spring, so there would always be one 'good' spring even if the bad one failed ...

[Stu]

So you would notice it fail (being the riding God that you are :)) but it would not be catastrophic :thumbsup:

Oh & Ben, sometimes you just can't give it away :lol:

[husky03]

blue your mad mate-you've got them out anyway and for a few quid you can ensure the springs you run in your forks will be 100%-nutter.

[Blue_SV650S]

blue your mad mate-you've got them out anyway and for a few quid you can ensure the springs you run in your forks will be 100%-nutter.

You don't get it do ya ... it's not about the money ;)

[husky03]

You don't get it do ya ... it's not about the money ;)

I do get it](*,)-its just you being you proving your point(which will probably be right:) )just want everyone to ride safe.

husky

[Blue_SV650S]

I do get it](*,)-its just you being you proving your point(which will probably be right:) )just want everyone to ride safe.

husky

That's the point* IS it dangerous?!!? ;)

*a bit like the tyres, although everyone sh1ts bricks when you go against the grain ... when you actually truly think about it, it probably isn't that dangerous at all ...

[flymo]

That's the point* IS it dangerous?!!? ;)

Ah its good to see someone willing to take a bit of risk :-)

Dont forget to report back when it breaks ...... you know what it'll probably outlast the bike and run forever. I wouldnt trust it on a space shuttle but it'll do an SV no bother ;)

[Keith1983]

Personally I wouldnt trust ut but that might just me my engineering backround and the product that the company I work for manufactures has to be spot on. If I knew it wasn't right or had potential to go wrong it would bother me, but that's your call. There might be potential for it to damage other parts if it did collapse though?

[Rich]

Wouldn't be much fun if it collapsed mid corner, now that could be costly. Worth a new spring if you ask me.

Just me 2p :rolleyes:

Rich

[Blue_SV650S]

Wouldn't be much fun if it collapsed mid corner, now that could be costly. Worth a new spring if you ask me.

Just me 2p :rolleyes:

Rich

No problem, but please explain to me exactly what you see happening in a failure and if you think the effects are dramatic, your rationale behind it?

If someone can give me a horror story with meat, I'll listen, I am not daft!! ;)

[Lozzo]

Just dress the edges off to relieve the potential stresses and run it. FFS, biking is all about taking risks. If there weren't risks to life and limb involved I doubt I'd ever have slung a leg over a bike.

[Blue_SV650S]

Just dress the edges off to relieve the potential stresses and run it. FFS, biking is all about taking risks. If there weren't risks to life and limb involved I doubt I'd ever have slung a leg over a bike.

I don't do silly risk, but do do calculated risk (and indeed yes, simply riding a bike to anyone is calculated risk!?!?).

So basically when making decisions like this, I do contemplate the chances of failure and the impact if it … I also ask others what they think the probability of failure is and their thoughts on impact … I then do a risk analysis and make an informed the decision. ... it's not jsut stupidity, its learnedness!! :study: :D

[Warthog]

Wow, I think my posts are invisible

[Blue_SV650S]

Wow, I think my posts are invisible

Why do you say that??? ... remember I have decided to go with the damaged one .. surely implying that what you said about having successfully run damaged ones yourself has helped weight it in that direction?? ;) But remember, just coz you didn?t have a problem, didn?t/doesn?t mean one couldn?t potentially exist ;)

[21QUEST]

Dude, you crack me up :D.

"There is only one Bluey" Some people ask,

Is he mad some
Is he just insane
Is he just a fruitloop OR
Is he just misunderstood

:rolleyes: :confused: :mrgreen: ;)


Ben

[Blue_SV650S]

Dude, you crack me up :D.

"There is only one Bluey" Some people ask,

Is he mad some
Is he just insane
Is he just a fruitloop OR
Is he just misunderstood

:rolleyes: :confused: :mrgreen: ;)


Ben

And what do you think/feel is most likely true/appropriate? ;)

[chakraist]

I would simply replace the springs with blocks of wood. This would solve all of your problems, even if they're not bike related.

[Blue_SV650S]

Oh forgot to say, I took the existing springs out of the Bandit forks, they look to be progressive ... does anyone know if they had progressive as stock or has someone upgraded along the way? ... if so they might be stiffer than stock bandit springs anyway ..