I HAVE A 1991 350 XT. I WOULD LIKE TO KNOW THE SPECS/MEASUREMENTS FOR THE RUBBER FLANGES (SAME SIZE) THAT CONNECT THE CARB TO THE HEAD. IN MILLIMETERS. THEY HAVE THEM FOR SALE AT BIKE BANDIT, BUT I NEED AN EXACT FITTING/SIZE, OR IT WILL SUCK AIR AND RUN LIKE #$%^^^! SO, I REPLACED THE ORIGINALS WITH ONES(NEW) THAT WERE TOO SMALL, BUT DREMELLED THEM TO FIT... NOT PERFECT, SO I NEED TO BUY THE RIGHT SET... THANK, JOHN EAGLE IN COLORAD