Yes it is nothing strange with those figures. When I bought the GSX R1000 -03 new I noticed that there was 50 grams of balance weights on the rear and thought - what a ****ty tyre. The bike consumed many tyres over the years, and always required about 50 grams on the rear; it was the rim unbalance that was dominant. It may be the same on your bike. Modern tyres on bikes do not usually require a lot of weight, unless it is cheap budget tyres.