Hello! I have a Sachs Bee 50 which is now already 8 years old. Yesterday I was torn by the V-belts during the ride. No problem, my husband said and changed it. However, this caused another problem where we don’t know where it comes from! The scooter normally starts with a kickstarter, but then makes a rattling noise and vibrates more than before. Bumped up he takes on gas perfectly and the rear wheel turns lightning fast. Higher speed also stops rattling and vibrating. However, the stationary gas is much higher than before and when you operate the rear brake it almost goes out. But the biggest problem is the following: If you take the running scooter off the main stand, it rolls in the stationary gas but even under full gas it does not move any faster. What could this be? We were only at fairing, air filter (there in the way) and at the belt itself (including Variomatrik? because you have to expand the probably to tighten your belt again. ) I would be happy about any helpful comment LG Shaini