but seriously it just looks like a brittle fracture to me, exactly what you would expect to see if the chain breaks chunks off a gearbox housing. The only thing that is slightly noteworthy (but not that unusual) is the bright mark near the top of the fracture. I can't tell for sure from the picture but it might be a pore in the casting.
I`m more intrigued by the cavity up the middle, is it meant to be there? It extends from the crankcase inner to within a couple of mm from the bottom of the (Blind)threaded hole coming from the other end of this piece. If it was solid(Apart from the threaded hole), this piece could be`taken out`by the chain without exposing a hole in the crankcase.
it is meant to be hollow, yes. A thick section piece that sticks out from the main casting is liable to crack if it isn't made hollow. It would be needlessly heavy, too.
I don't think that the idea of the thing getting knocked off would have entered into the thinking of the designer.
Thanks for that.I`m assuming it won`t be a problem when that void/hole is filled with epoxy/aluminium putty. My plan is to use the broken piece as a guide to tap a blind M6 hole into the crankcase proper/putty and use a bolt to`pull`the broken piece back to its original position.As my fracture faces fit each other well, i obviously need something less viscous to bond them together, possibly the`non putty`version of the epoxy/aluminium.
You got lucky there. I've seen the results of a snapped chain on a Skorpion that punched a 2" hole in the engine casing. I'm aware it's a little (!) off-topic for the CTC forum, but what brand of chain was it?
We have been very naughty havn`t i. Can`t remember what chain it was.I`m away from home looking after dad for a while, i`ll take a look when i return. A TWO INCH HOLE!!
s1965c wrote:You got lucky there. I've seen the results of a snapped chain on a Skorpion that punched a 2" hole in the engine casing. I'm aware it's a little (!) off-topic for the CTC forum, but what brand of chain was it?
s1965c wrote:You got lucky there. I've seen the results of a snapped chain on a Skorpion that punched a 2" hole in the engine casing. I'm aware it's a little (!) off-topic for the CTC forum, but what brand of chain was it?
If that had happened to my Skorpion I would have cried.
Why does it seem like every other poster on this forum is or was an MZ rider?
Freeloader, you may still be able to claim a replacement under the 'sale of goods act', which states that the goods must be of satisfactory quality and fit for purpose. It gives you up to 6 years to make a claim, but you have to prove that the goods were faulty at the time of purchase. You might benefit from posting a close up of the break and perhaps someone like Brucey or CJ might be able to identify a flaw. An expert opinion is what you need.