Hi John,
I've got some GSXR600 TBs to be fitted to this engine - I really must update the website! I will need to make up some brackets to support the weight of the TBs so they're not just hanging from the silicone hoses...
The 1.6 had the ABS and AC pumps fitted too which have been removed. I've fitted the aux belt from a 1.25 and I got a belt tensioner from the scrapyard today, also from a 1.25, which all fits together perfectly and gives the belt run shown below (this is a pic of my 1.25, but the 1.6 is now the same).

You can see the tensioner on the left hand side of the belt run.
As for the waterpump... I'm not sure off the top of my head - I'll check and post an update.
What alternator and ECU are you running?
All the best,
Ed.