Hub marks. Help!

[little.whittle]

Hey, need some advice here, found strange looking marks on my rear hub. :gob:

Cheers

[crazyhorse]

Looks like a tyre to me :killingme

[little.whittle]

Looks like a tyre to me :killingme

Well its the hub.... haha will get better photos tomorrow

[mowgli]

Looks like a tyre to me :killingme
Look again crazyhorse. T'wud be an uncomfortable ride on alloy tires :lol:

[t595]

doesnt look like its guna last much longer

[clmintie]

Looks like a tyre to me :killingme

Don't know ya knobs from ya nipples.............

Don't look good mate, haven't seen this before, might be a good idea to take it to Triplex for inspection. Hope it's not terminal....... :sick:

[little.whittle]

doesnt look like its guna last much longer

Thats i im thinking :blink: Its not even 2years old

[mowgli]

Probably just casting marks that have picked up a bit of dirt. Definitely have it checked but no need to assume the worst.

[t595]

maybe you hit something a bit to hard?:shit:

[flyingcr250]

Probably just casting marks that have picked up a bit of dirt. Definitely have it checked but no need to assume the worst.

they look like fatigue cracks to me:gob:

[little.whittle]

they look like fatigue cracks to me:gob:
My poor wallet :crybaby: haha

[vanmajor]

Yeah not gonna lie, looks like stress marks - watch out they may develop into cracks and then you may be questionning what happend to your rear wheel.


I'm thinking it ain't gonna last too much longer.

[little.whittle]

Hope it lasts part of the m3de :confused:

[clmintie]

My poor wallet :crybaby: haha

Yeah, but you may have just saved yourself a painful splat..... Good onya for being thorough with your post/preride checks...... :cool:

[mowgli]

they look like fatigue cracks to me:gob:
Yes, they may well be fatigue cracks. But they could just be crud accumulating at about the same distance from the centre. Do the marks rub off?

[Crisis management]

Hope it lasts part of the m3de :confused:

One word, don't.....as in don't use it any more, it's cracking and will break usually causing damage to other parts when it lets go.
You did well spotting it, so now do the next step and get it checked by someone that really knows what they are talking about and either repair or replace.

[little.whittle]

Yeah, but you may have just saved yourself a painful splat..... Good onya for being thorough with your post/preride checks...... :cool:

Yeh was the night before the bel ray and found that and like 9 of my teeth ripped off my frnt sproket! last ride i rode 1 lap and went end over end into a tree... broke front fender 2... and finger :bash: But that mustnt be how that happend. Saw it when changed the bearings

[vanmajor]

Agreed, don't ride it anymore. Definately don't do the M3DE on it!


Like a sprocket, once it's started it'll just keep going and going. Take it into a shop and ask what the deal is.

[little.whittle]

Agreed, don't ride it anymore. Definately don't do the M3DE on it!


Like a sprocket, once it's started it'll just keep going and going. Take it into a shop and ask what the deal is.

Looks like i will take to ktm and hope can get fixed :blink:

[flyingcr250]

Looks like i will take to ktm and hope can get fixed :blink:

im gunna check mine tommorow lol.

almost looks like the spokes were too tight and its pulled on the hub wall, and finally just work hardend, or it could just be a one in a million manufacturing fault that missed quality controll

[oldnslow]

Seen this before when the wheel has been over tighted it can cause stress cracks in the hub, take it into the shop to be sure. :crybaby:

[B0000M]

on the plus side theres a lot of ktm owners on here who wont be doing the m3de, perhaps a generous one would lend a suitable wheel if you're not back in action by then

[barty5]

Looks like i will take to ktm and hope can get fixed :blink:

only fix youll get for that is replace if you try welding it it will most likely warp and be way outa balance

[tommorth]

how tight do you run your chain ?

adjusted mine with shock out on sunday with the bike on the stand its so loose it looks silly but with sthe shock out and cs pivot and axle in line its got very little play

[little.whittle]

how tight do you run your chain ?

adjusted mine with shock out on sunday with the bike on the stand its so loose it looks silly but with sthe shock out and cs pivot and axle in line its got very little play

Chains never overtight its normaly got a bit of slack.
Also my spokes havn't been tightend for ages, i always cheak them and they seem fine, they have less tension than my front spokes anyway :gob:

[Danger]

Hey, need some advice here, found strange looking marks on my rear hub. :gob:

Cheers

Is this the sprocket side? You mention that the front sprocket lost teeth and you replaced bearings and these stress marks all lead me to believe the chain has been too tight, that will cause a hub to eventually break. KTM's need what at first appears to be a loose chain, once everything is inline they are not loose at all.

[camchain]

Good heads-up little whittle, cheers.
Wouldn't be the first KTM to have a cracked rear hub. A riding mate just replaced his 300 hub after a large crack appeared from sprocket side across to brake side.

If main issue is chain possibly being too tight (seems logical), method of checking tension as per KTM handbook not the best imo - i.e. from underneath, just behind slipper guide, push chain up to swingarm = 8mm to 10mm gap. Very awkward to do.

Been thinking it would be more accurate & a lot easier to measure from a position where you can more easily see how much slack, like maybe halfway between front & rear sprocket, from top of swingarm. To get a proper measurement, you really need some tension on chain to straighten out any kinks & take up slack in pins/bushes as well. I've just tried lying across seat and grabbing swingarm to line up centres but 80kg and weak arms won't do it.

I'm replacing my shock heim joint this week. With the shock out I'll take a closer look at chain tension at tighest point (As per tommorth) and report back. Might even think about making a chain tension guage for the toolbox.

Danger, a question for you: A chain that is even just a little bit too tight could significantly effect suspension action as well? Obviously one of those things that requires a bit of 'feel' to judge appropriate tension at tightest point of swingarm arc. Any suggestions?

[little.whittle]

Is this the sprocket side? You mention that the front sprocket lost teeth and you replaced bearings and these stress marks all lead me to believe the chain has been too tight, that will cause a hub to eventually break. KTM's need what at first appears to be a loose chain, once everything is inline they are not loose at all.

Its the brake side. Nothing at all on the other side

[tommorth]

Its the brake side. Nothing at all on the other side

maybe you should stop useing your rear brake :yes:

camchain just pull the shock its only two bolts and it slides straight out really easy one of the great things about having no linkage

[mowgli]

Its the brake side. Nothing at all on the other side
When you say "nothing at all on the other side" do you mean the row of spokes on the other side of the hub or the surface immediately behind the marks in question?

[little.whittle]

the other side of the hub, the sproket side

[camchain]

Hmm brake side? May not be chain tension issue on this one then. Yours an '08? Hubs look quite different on later model KTMs, they look like billet but maybe still cast but machined to look like billet? Sure all your spokes have even tension?

Yeah tommorth, easy to pull bolt but I still have to replace heim joint anyway.
Done an info trawl on chain tension for the new BMW 450X (has cs sprocket in line with swingarm pivot). They appear to have had some early probs from running chains too tight, now suggestion is running 5-10mm slack. Will try this and see how it looks/compares to standard.

[2strokekid]

my ktm85 did that exact thing bt after about a couple of months we noticed the hub had cracked so we had to buy a new 1:Oops:

[theblacksmith]

Is it running true still?
Are the cracks all the way round the hub?
They look very much like fatigue cracks.

[little.whittle]

Is it running true still?
Are the cracks all the way round the hub?
They look very much like fatigue cracks.

Well didnt put wheel on bike, sent it to KTM who took a picture and sent to KTM in austria as aparntly there was a batch of faulty hubs in 2008. So hoping for it to be under warrenty :shifty:

[theblacksmith]

Well didnt put wheel on bike, sent it to KTM who took a picture and sent to KTM in austria as aparntly there was a batch of faulty hubs in 2008. So hoping for it to be under warrenty :shifty:
Cool - hope it is for ya. Save a bob or two Im sure.

[Reckless]

Well didn't put wheel on bike, sent it to KTM who took a picture and sent to KTM in Austria as apparently there was a batch of faulty hubs in 2008. So hoping for it to be under warranty :shifty:

That's good at least they have fronted up and had a look under warranty.
They could have just bullshitted you into buying a new rim.
Was that Steve at Triple X?

[camchain]

Saving money on motorcycle production costs and spending more on product development - handbags.

[noobi]

Saving money on motorcycle production costs and spending more on product development - handbags.

...and toasters, and gumboots, and sunglasses, and shoes, and bibs, and pacifiers, and jeans, and shirts, and backpacks, and ring spanners, and battery chargers, and tents, and dog bowls, and coffee mugs, and pens, and ipod covers, and golf accessories, and binoculars, and air fresheners, and umbrellas, and aprons, and scarfs, and hats.

last but not least teddy bears...

[barty5]

...and toasters, and gumboots, and sunglasses, and shoes, and bibs, and pacifiers, and jeans, and shirts, and backpacks, and ring spanners, and battery chargers, and tents, and dog bowls, and coffee mugs, and pens, and ipod covers, and golf accessories, and binoculars, and air fresheners, and umbrellas, and aprons, and scarfs, and hats.

last but not least teddy bears...

You left out wrapping paper.

[xen]

saw this if you need one still http://www.trademe.co.nz/a.aspx?id=253379631

[little.whittle]

Thanks but it has been checked over and they said its fine to ride on :sweatdrop

[xen]

Sounds abit dodgy lol

[little.whittle]

mite be a new bike soon tho :woohoo: