04 TE450 Jetting

New bike is very hard to start.
(I'm in London UK so Sea Level and cold)

Bike as delivered.
Stock needle
180 Main
32.5 Pilot

Will start with choke and repeatedly twisting the throttle while on the button. (Totally different for other 4T's I've owned!)

Will run fine full choke but dies instantly the choke goes off. It sounds like the Pilot is too small or is clogged?

Went to the 10F01-50 needle as recommend by many on Thumpertalk
Slightly easier to start.

Upped the Pilot to a 35 (brand new so not clogged or dirty)
Slightly easier again to start. Sounded like it wanted to start without having to yank the throttle like a school boy with a stick mag but never quite got there.

I suppose I'll just keep uping the pilot size until it starts OK? I've read these bike are super lean stock.

Any ideas/suggestions/tips etc would be greatly appreciated!

You might check your valves if you haven't already?

I should've mentioned that.
Just checked valve clearances and both exhaust and 1 intake were tight. I've re shimmed and now all good.