Thanks for the welcome. I've been reading Bill's stuff. Probably easier to tune a harpsichord than these Teikei fangs
I had a bit of a stutter just off idle and a flat spot on full throttle at around 3500 revs in a high gear. Did all the usual things like float level/synch etc. Then tried the Italian tune up of warming it up, removing the airbox and air vent pipe, giving it full throttle/revs then covered both intakes to suck any crap from the multitude of orifices (orrifii?).
Slight tweak to the pilot (2.5 turns, manual says 3) and it's a good 'un

Out of interest, the primary slide is now at 4mm height before the secondary butterfly opens. Everything else is stock, including the hideous Lafranconi silencer.