Testing the Logitron regulator/rectifier
Posted: Sun May 10, 2020 4:32 pm
Hi guys, my name is Ed and i'm a long time Ducati owner. Currently i own a '79 900 GTS Bosch and a '74 350 Mk3.
The 350 being the blue/gold, non desmo version. The bike originally runs 6 volts, comes with Motoplat ignition (pick-up and transducer) and a Logitron regulator/rectifier (r/r unit).
The Motoplat ignition has been replaced by a Sachse 3.10 pick-up and ignition box and a Conti 6v transducer.
The Logitron r/r unit is still there, but i want to test it. I can't get the bike to start right now and as all the other parts are new, i'm suspicious of the r/r unit. I can't see a spark with the spark plug held onto the cylinder head. However, the bike did run with the new set up.
I read a couple of threads on Motoscrubs and got a basic idea of testing the r/r unit. So i ran a few tests, but honestly i have no idea what i'm reading there. Could you please tell me if i ran the right tests and what the measures mean? Basically i want to know if my r/r unit is still up to the job.
Thanks in advance!
Cheers,
Edwin
Testing the Logitron R/R unit
Test 1: all wires attached to r/r unit, ignition key switch off, battery attached
Test 2: all wires attached to r/r unit, ignition key switch on, battery attached
Test 3: no wires attached to r/r unit, except marrone (brown), ignition key switch off, battery attached
Test 4: no wires attached to r/r unit, except marrone (brown), ignition key switch on, battery attached
Test 5: no wires attached to r/r unit
Testing with multimeter, set to Ohm
Ground: metal casing of r/r unit.
first reading is with black tip of probe to ground, second with red probe to ground
-----------------------------------------------------------
1 yellow1 to ground 1 / -417
1 yellow2 to ground 1 / -417
------------------------------------------------------------
2 yellow1 to ground 1 / -422
2 yellow2 to ground 1 / -422
------------------------------------------------------------
3 yellow1 to ground 1 / 1
3 yellow2 to ground 1 / 1
------------------------------------------------------------
4 yellow1 to ground 70 / 82
4 yellow2 to ground 210 / 48
------------------------------------------------------------
5 yellow1 to ground 1 / 1
5 yellow2 to ground 1 / 1
------------------------------------------------------------
The 350 being the blue/gold, non desmo version. The bike originally runs 6 volts, comes with Motoplat ignition (pick-up and transducer) and a Logitron regulator/rectifier (r/r unit).
The Motoplat ignition has been replaced by a Sachse 3.10 pick-up and ignition box and a Conti 6v transducer.
The Logitron r/r unit is still there, but i want to test it. I can't get the bike to start right now and as all the other parts are new, i'm suspicious of the r/r unit. I can't see a spark with the spark plug held onto the cylinder head. However, the bike did run with the new set up.
I read a couple of threads on Motoscrubs and got a basic idea of testing the r/r unit. So i ran a few tests, but honestly i have no idea what i'm reading there. Could you please tell me if i ran the right tests and what the measures mean? Basically i want to know if my r/r unit is still up to the job.
Thanks in advance!
Cheers,
Edwin
Testing the Logitron R/R unit
Test 1: all wires attached to r/r unit, ignition key switch off, battery attached
Test 2: all wires attached to r/r unit, ignition key switch on, battery attached
Test 3: no wires attached to r/r unit, except marrone (brown), ignition key switch off, battery attached
Test 4: no wires attached to r/r unit, except marrone (brown), ignition key switch on, battery attached
Test 5: no wires attached to r/r unit
Testing with multimeter, set to Ohm
Ground: metal casing of r/r unit.
first reading is with black tip of probe to ground, second with red probe to ground
-----------------------------------------------------------
1 yellow1 to ground 1 / -417
1 yellow2 to ground 1 / -417
------------------------------------------------------------
2 yellow1 to ground 1 / -422
2 yellow2 to ground 1 / -422
------------------------------------------------------------
3 yellow1 to ground 1 / 1
3 yellow2 to ground 1 / 1
------------------------------------------------------------
4 yellow1 to ground 70 / 82
4 yellow2 to ground 210 / 48
------------------------------------------------------------
5 yellow1 to ground 1 / 1
5 yellow2 to ground 1 / 1
------------------------------------------------------------