Status update. No luck with the 6pin tacho-connector, could be I just couldn't find right combination. Next step removed the tank and found out cdi was not there but behind battery But I don't know if it's possible to make pin#9 connection for this type connector (america -10). So now I wonder as last attempt to connect to coils negative terminal (DS installation pdf). Can anyone help to figure out how to do it ? There seems to be a plastic cover infront of coils and had to take it out before reach the wires..

some pics: http://hudemisc.blogspot.com/