Those little nipples are for over flow tubes that run down. I had a '82 model back in the day and raced it 3 or 4 years, great bikes. It was much like yours but the 1st year mono shock and had reeds, nice motor. Good old Bing carb with the tickler, messy but starts good.
2007 Suzuki DL650 V-Strom
1976 Suzuki GT750 Waterbuffalo