That's a very good question. I have no personal knowledge of the K1 model, but others here will. I just had a look at the online parts fiche and it doesn't show a switch but maybe there's one built into the controls for that side of the bars??
Hopefully someone here will chime in soon with the correct answer..
By the way,
welcome aboard!

Please take the time to fill out your profile (name/location) info, if possible, for future reference, so we can help one another out a little easier when parts hunting, etc...
GB :mrgreen: