With the benefit of your advice amongst other things. I have investigated further.
I have a flasher unit (part number 1A0-8339503) that has a 6 wire block connector that should deal with the self cancelling. I am assuming that if I get a new one my problem will be solved.
Any comments?
You need to give a full and comprehensive detail on what is standard and what is in working order and has been gone over and inspected by yourself so far.
Have you checked...removing ALL globes and the internal lampholder where they go is not corroded or rusty...check corrosion on centre contacts as well as the globes.
For what it s worth...replace ALL indicator globes ...working or not.
Have you done a continuity / ohms check for a good earth between all lampholders to the battery negative.
Have you removed the screw holding a number of ground wiring lugs at the regulator/rectifier and cleaned the thread into the frame as well as screw and connectors.
Have you done a voltage test across the battery ...before....and after starting.
Have you checked the alternator connector for poor contacts....cleaned all multipin as well as bullet connectors throughout the bike ?
The list goes on...the symptom you have may just be connections in the loom harness connectors that need cleaning for a good contact.
Have you checked battery voltage when motor is running.
Remove the switches on the handlebars and inspect and clean and lubricate where necessary.
Indicators notoriously play up with bad ground or undervoltage .
As a new owner don t assume all is well on these 40 yr old bikes...especially electrical connectors.
Open the head light shell and pull apart all connectors for inspection and cleaning.
Theres nothing to say you have a faulty component until all other parameters have been checked and maintainence has been carried out.
You may be surprised what you find and at the same time help prevent a breakdown whilst out riding.
Do you have the original flasher canister?