Mystery setback?

September 14th - 16th

Rolled the beast out for some more Mikunitunes.

Wouldn't start.  After an initial catch there was no sign of life.

Checked for sparks - ok

Checked with strobe - had to fiddle to get a light - seemed ok but not sure which mark was in view.

After some piddling about it rained.

September 16th

Put the carbs back to initial settings.  Still nothing catching.

So re-checked timing - miles out the disc must have slipped.

Put it back to standard - fired up straight away!

Analysis
At the end of the last session (thinking all was good) I screwed to new alloy distributor cap on and tightened it down.  Does it interfere with the timing rotor?  On inspection no sign of any circular marks that would indicate contact - so maybe I just need to be firmer with the grub screws tightening the rotor?

Hmm.  It's a bit worrying if the rotor is prone to slippage.

Next steps - - put the carbs settings back as per previous (needle max height, air screws 3/4 out) and start over.