Failed Shock unit

[lavjohn]

My Laverda 750 has been sat in the back of the garage for at least 5 years

(I know its a sin but one sunday school never prepared me for)

Any way when I started to strip the backend out today I found that the monoshock unit, originaly of an FZ1000 had sheared at the far end of the damper rod.

 

[ELIMINATOR]

Oh shit!

 

[lavjohn]

Any idea why this has happend?

this is the shock it was originaly built with, I had one in from a chunder ace that was a bit longer and that one also snapped, at the time I dident realise it was endemic and just put this one back in.

 

[lavjohn]

and here she is: my other pride and joy, well she would be if she dident pi@@ me off like this

 

[Steptoe]

Is that a Motodd frame -

 

[lavjohn]

No, the frame was built for me by Andy Sidlow. He is going to be my next port of call when he's back next week, just thought I might be able to get some insight first.

 

[Shep]

The swing arm must come close to the shock under full compression, are you sure the dia of the shock isn't too large

Shep

 

[lavjohn]

I have bodged it back together with tyraps and blue tack.

cant see any damage on the swinger that might have been hit by the shock and dont remember any klunks

 

[lavjohn]

the tie rod is not the original as they are adjustable stainless jobbies and now adorn the wifes Bandit (girlies get all the best bits)

 

[Shep]

Run a straight edge between top shock mount and bell crank (bottom shock mount, check for vertical missalignment

As the rear suspension is relying on the engine for alignment, you've not had a minor prang and bent the engine mounts or assembled the engine / frame plates bolts or spacers wrong causing alignment problems

There will be something wrong somewhere, very rare in my experience to snap a shock rod

Shep

 

[lavjohn]

Just stripped the backend out and been over it every which way and it all appears square (machine saw blade) it only fits together one way and its not had a shunt, only done about 2000 miles all up

there is a small mark on the inside of the swinger but I would have thought that it would have had to have some real abuse to snap like that.