Yesterday, Sunday, I went down to the garage for a while to continue assembling the motorcycle.
I set about regulating the air/fuel mixture of the carburetors.
So I installed the air filter, plugged the water pump outlet and filled the engine block with coolant so that the seal would not run dry.
Yes, I know, It is not a pretty cap to look at but it is effective to use.
I added fuel and started the engine.
With a deafening noise he was doing 30/45 second stints with the engine running to adjust the carburetor screws until he saw the flames change from yellow to blue.
After repeating the operation several times, the coil that feeds cylinders 2/5, the one with the green cable, failed for no apparent reason.
I separated all the connections until I reached the pickup and sprayed them with electrical cleaning fluid, nothing, no sign of spark. I loosened the electronic ignition advance adjustment screws and tightened them again, there was still no spark in that coil.
To check that it was not a defective coil, all three are new, I removed the spark plug from cylinder 2, disconnected the coil from the green wire that powers it and connected it to the black wire from the coil of cylinders 1/6.
I turned the engine over and there was spark, the coil didn't fail.
I also connected the green cable to the coil of the 1/6 cylinders and there was no response when turning the engine.
After a few attempts I gave up trying further.
This morning with the engine cold it started the first time working perfectly but when it warmed up a little the engine...
FAILED AGAIN!
The pickup has not warmed up, only the engine, cylinder block and cylinder head.
I will need to hire the services of an automotive electrician to come and check the ignition circuit with a tester, I no longer know more about this topic.
I forgot...
I detected this coil failure before disassembling the bike but I attributed it to some old coils, I bought the new coils for that reason believing that the problem would be solved.