When good sprockets go BAD

[Cajun]

Just after new years, i had an accident where all i can believe is a stone and my rear sprocket.

Took off after waiting for people to catch up on a ride, had parked in some gravel, when took off heard a rather loud crutch, never though any thing of it since bike was still going fine. and was 250kms from home.

So happy go on my way, after a we bit, started noticing ass soon as i try and give a handle full of throttle bike would start making bang bang noise where bike wouldn't accelrate away, slowly started getting worse and worse.

when i got home, my rear sprocket did not look to healthy, as you can see from the below sprocket. Its a vortex 47 tooth, harden steel with a Black, PTFE Hardcoating. and only done about 10,000kms

Since i am running a 520 kit, no one in country had any in stock since all the racers had brought up all the stock before heading down to SI nationals.

So in turn i finally bite the bullet and ordered one from overseas,

its a Supersprox Stealth

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Why did you call this sprocket Stealth?

Ste = steel (for the teeth)

AL = Aluminium (for the middle part)

T = Teeth (Supersprox new tooth design)

H = High performance
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[Gremlin]

nice bit of porn...

Your bike is disgustingly clean

[Cajun]

nice bit of porn...

Your bike is disgustingly clean

not really, it has been out of action for past 2 weeks, and so i just cleaned the rear end, while wheel was up in the air, for sprocket install, and also just added some yellow rimtape to it front end isn't as clean

[Taz]

Tell me you didn't fit that new sprocket with the old chain? If so your new sprocket will look like the old one in no time. You can even see the sticky links.
Whats the front sprocket like?

[dhunt]

Man there isn't much left of that sprocket. It's hard to imagine how that happened. What's your chain look like after that?

[sAsLEX]

You can even see the sticky links.
Whats the front sprocket like?

Yeah doesn't look flash at all!

[erik]

So happy go on my way, after a we bit, started noticing ass soon as i try and give a handle full of throttle bike would start making bang bang noise where bike wouldn't accelrate away, slowly started getting worse and worse.

I'm guessing the bang band noise and lack of acceleration was due to the chain slipping/skipping teeth on the sprocket? That sprocket looks really seriously worn, I can't imagine how a single stone could do that. Was it quite badly worn before the ride or do you think it went from ok to that condition in one ride?
Are all the teeth on the old sprocket the same or is there one (or a few) that are more badly damaged (like where a stone might've got stuck)?

[riffer]

As mentioned before Neal, that's chain's rooted. It'll stuff that sprocket soon as.

[Nonbeliever]

vortex = shit sprocket

[Dino]

+1 for concern about the state of your chain, do you use a good quality chain lube?

.

[MotoGirl]

As mentioned before Neal, that's chain's rooted. It'll stuff that sprocket soon as.

+1 for concern about the state of your chain, do you use a good quality chain lube?

.

Oh God, how much is this going to cost me?
*puts Cajun's B-King on the backburner* (damn shame!)

[Grumpy]

Just fitted a Supersprox Stealth to the Z. They sure look the biz don't they? Heard nothing but good shit about them, which was the reason I went down that road.

[warewolf]

I've heard of problems with them on KTMs, the two parts don't stay together properly IIRC (rivets get loose?)

[riffer]

Oh God, how much is this going to cost me?
*puts Cajun's B-King on the backburner* (damn shame!)

Approx $250 for a DID X-ring gold chain. Around 45 minutes of your time to install it if you have a chain tool. Easier with two people to do it.

[shafty]

Bummer Cajun, must've been some fight to lose so many teeth, - how does the other Guy look? Never had that problem on the ST, can't figure why........