I've got the headlights on a relay, but this is before the stalks for the dip and main beam. Can a sierra stalk handle this???

Is the relay live all the time as it sounds you are using it for the wrong purpose. I can't see how the Sierra switch will stand up to carrying the full current for the lights if you use them a lot as it only supposed to switch the relay. You may as well not have the relay in as it is wired at the moment.

yours, Pete.

Austen
If you wire it in as per the bike wiring diagram ie switching the relay then it will be OK.

Gordon

PS Ive sent you Email