Help what happens now

[Stormbringer]

Thanks for the info guys .
The new chain and sprockets fitted by Yamaha 3 days  before the accident where Yamaha parts .
On the ride down to Guilford there was no knocking .
The bike could not be ridden after the accident until the repairs had been done .
The knocking was evident as soon as the bike was ridden.
They had fitted another new chain while doing the accident repairs as the chain was bent in the accident .
They are inspecting the bike today to see what is causing the knock .
Let's hope its a chain/sprocket issue .
John