Hi Edward,
Will check all wires/connections
Particularly check the continuity of the Black/White and Black/Yellow wires between the pick-up and the amplifier. If you (or the fitter of the Rita) used the old points wires, if I remember correctly, there are bullet connections about half-way between?
Less likely but should also be checked:-
Is this with ignition switch off? If so, check the battery Volts with the ignition switch turned on.
Also check that the Volts you see on the meter with it connected across the battery are the same as you see with the meter connected between battery +ve and the connection between the wiring harness White/Yellow wire and the Rita Black wire.
With the ignition on and the meter connected between battery and Rita as above, gently wiggle the key in the ignition switch and the button of any kill switch to ensure neither has an intermittent problem.
According to a friendly neighbour it is a spark but a lousy one
In my experience, even 'good' ones don't look very good; I am afraid what the spark
looks like is never much of an indication one way or the other.
The pick-up has a White wire and a Black wire? Does the bike still use the old Black/White and Black/Yellow wires from the pick-up wires to the Rita amplifier? If so, are the two pairs of wires joined together on a thin threaded stud, separated from the stud by a plastic sleeve and from each other by a collection of fibre washers?
This is the most unreliable part of the Rita.
When you come to reassemble it, have:-
. Either a snap connector
exactly like this and either four standard 3/16" (4.7 mm.) o.d. bullet terminals or four
like this. If you experience difficulty obtaining the particular snap connector, one can sometimes be found making the rear lamp connections, for which three single snap connectors can be substituted.
. Or two "
Japanese bullets", sockets and insulations.
... depending which you get, I will be pleased to advise a more-reliable connection in place of the original Rita one.
pick-up
resistance of the coil is 280 Ohm.
It appears a little high (normal resistance is ~200~250 Ohms) but shouldn't be a problem. I would check the resistance with another meter, in case a failing battery on the first meter is the reason for the 'high' reading.
Hope this helps.
Regards,