Does anyone know the weight of the OEM bar ends? I am interested in adding a set of rizoma bar ends but the dealer cautioned me on the lower weight and vibration. They showed me a set of angled bar ends from Rizoma that weigh ~70 grams each which is the heaviest they come in. Any clue what...

I'm planning to get these. Do I need a bar end inserts or can be installed without them? Since they are sold separately I cannot make it if I need them or not. Please chime in.