Chain

what can us Monza owners do? Mine desperately needs a new one.

Are they the same as a Breva's?

If they are where are the Factory obtaining them from for new build?I just had a butcher's at a parts list for newer small blocks and they have single row chaines...
You could try Martin Hagermann at Guzzi Piu in Germany . He specialises in small blocks and got me some bits for the NTX that were not available anywhere else.
There must be as many V50's and Monzas still around as the rest of the small blocs put together so someone somewhere has either got old stock or will find an alternative -hopefully !!!!
A good reynolds industrial chain supplier could also help if there are any of those left in the UK.,,