OK bit of an update....

Went to try again and the fuel overflow pissed out fuel, so 2 things. 1 plenty of fuel getting there, 2 float stuck. The carbs on this are a major pain to remove, they don't seem to fit between the frame and block. Anyway I gave up for the day as I couldn't face it.

Tried again this morning and there was no leak.
Kicked the bike over and she starts but doesn't tick over for more than a few seconds. Can't touch the throttle, just dies straight away.

Idle screw is just touching the mechanism, any more and she won't fire, any less and its not doing anything.

Tried some easy start and it will keep her ticking over, not revving high, just ticking over.

I managed to get a couple of good revs from the throttle but didn't want to do too much.

Just wont tick over, its like it won't rev till its warm but won't run enough to get warm.

Not sure about the mixture screw, don't even know where it is. For those unfamiliar with the Yamaha YDIS carb, its a single carb with extra inlet system, no float bowl on the secondary side, it is fed from the primary. So its not dual carb, more like 1 and a half carbs.

The other issue I have is it is an Italian import (private import) so the engine number doesn't come up on any Yamhaha charts. I am really struggling to find parts like jets etc.

Any advice welcome, I need to use this bike in a few weeks.

TIA