KIT inition 6 volt /Dynamo K 2543

Hello

Sorry for my poor English.
I have a KIT ALLUMAGE ELECTRONIC.K 2543 for my motorbike from 1953 monocylinder 6 volt and dynamo it was running very well about 100 Km and with nice spark.

My motorbike have a switch for running with battery or without battery only to de dynamo if the battery is died it’s possible to go home only with current create by dynamo (6 volt 45 Watt)

When I was try to switch to dynamo the motorbike run 2 minutes and after it break down and no more spark.
For the moment I run with the conventional ignition but I would like use the ignition ELECTRONIC.K 2543 because when it works, the motorbike run very well and the idle it’s nice.
It’s possible when the mode go down the tension go down and the current go up? But I don’t know what happened.
Please say my if you are the solution if I need to change some component (transistor T1 or ???)
Best regards
Antoine

Sorry, we have no experience with this problem.
Did you try to return to battery operation? Does it still work?
If not, most likely the power transistor is defective.

Hello
We have changed the transistor T1 and now the ignition run. But only with the battery. One day the battery certainly will die and the problem will return up. Have you some element for protected this transistor T1?
There are new component like the IGBT (IRGS14C40L) it’s smallest and possibly can be the solution?
Best regards
Antoine