Hello, for a moment to me.. I just registered and don’t know myself this way yet.. And this is about my Rex RS 500.. and it was broken and had to repair it. It was due to the Variomatics. I expanded the old one and it was totally in A…. and since I didn’t know what weights I needed, I looked how much gram the old ones had .. I chose the best one and they had 8 gram (depleted) so I think the 8.5 gram were new.. But since I was there.. always be careful and I bought the scooter used, I turned around again on the internet and saw what I need for vario rolls for my REX. Standart 5.5 gram … so completely new Variomatik bought. 16 Euro. built in and see here, the scooter runs again. Different, but better as before.. due to the difference of the Vario weights…. nevertheless when driving off he needs a bit when I have 10 km/h on it he gives real fabric and accelerates a uch still mountain up.. and I can still remember how he is still open with the old weights, he mountain has become more and more slow and laboriously dragged up. he pulled away better and ran great on the straight but as soon as a mountain came, he had to make a real effort.. so my question .. should I leave the weights so or go a little higher that he also comes away a little faster from the stand but nevertheless speeded up at the mountain !? Otherwise I am still mountain up.. very satisfied! Lg.. Florian