I am looking for a new vacuum hose from the petrol tank to the carbs but davidsilver are unable to get one as Honda has stop making that part, any ideas where I can get a new one thanks?

put a post in the correct section and try and get a used one. if silvers cant help with new, and other honda suppliers cant help then second hand is your after market are your only options really.
aftermarket is fine.

I think Rick Oliver has this,
He is a member here send him an email.

Thanks hunter i will try him cheers.

I brought generic 'vaccum hose' from my local bike shop

1 meter with 4mm inner diameter.. works great, was about 6gbp.