Topic: my chain keeps going slack ?!

[grumpy]

OK, what am I doing wrong?!?!

The chain on my K3 keeps going slack.
I tighten it to ~1/2' deflection like the manual says & set the tensioners.
2 rides later it has about 1.5" deflection.
Retighten, same thing again.
I had an old chain that I though was stretched beyond use so I replaced it with one of these
~600 miles later it's still doing it - same scenario.
The axle isn't slipping - I check the position markers on the drop outs.

So what's the deal?
What's about to blow up? Main drive shaft/gear? Rear axle?
WTF?

[seaweb11]

Hows about a couple of photos of your present set up

[grumpy]

Hows about a couple of photos of your present set up

Totally stock 750K3
Camera batteries are on the charger...

[kghost]

Average tensile strength of 7,850 lbs
Suitable for up to 750cc max

I dunno....My two cents is that its on the light side for the CB750.

I'm sure someone will disagree but I like my chains in the 10,000+ side of tensile strength.

All new chains have a bit of stretch during break in....but continual issues with reoccuring slack sounds dangerous.

[TwoTired]

If you didn't change the worn sprockets, the new chain will quickly stretch to fit the wear pattern of the old sprockets.

[grumpy]

Yeah, I thought the chain might be a little wimpy but I don't flog it. Just ride it to work....

Could be new chain/old sprocket syndrome...

Now I'm questioning whether the old chain was really bad.