Has any one any ideas / suggestions on the following
1925 TS will start and run for 20 seconds approx then dies and wont start again for an extended period (15minutes or longer) and then runs again for 20 seconds or so.
I dont think it is fuel as the float level stays constant when it is running.
With the plugs out and shorted to motor I see a good spark on each AT TIMES but at other times nothing.
I have cleaned carbon brushes and slip ring. Does anyone have a recommendation for a modern spark plug for this model. This one is still fitted with the original mica insulated type, although I have been testing spark with modern plugs as well as originals.
I've owned this bike for 30 years and when I last used it about 20 years ago the problem did not exist.