Hello, I have changed the original seat on my DT 80 for a longer one, in order to be able to allow it as a motorcycle. That is possible I have been confirmed by Yamaha, moreover it is also in the repair manual, which is however already 15 years or so old. I also have a part report for the longer pinion, and thus had a Tüv acceptance made. Afterwards I am to the registration office to register the DT, however, there they tell me that this is not possible As it is a lightweight motorcycle and cannot be registered as a motorcycle, the increase of the top speed as documented by the Tüv-certificate would not help, as it is still an LKR at 92 km/h. As a result, I am back to Tüv today, in order to register in the report that the DT with 92 km/h can be registered as a motorcycle, as described in the manual. However, the Tüv-man did not want to enter this for me, as in the part report worded How do I still get the DT approved as a motorcycle, what do I have to do? Or are they right at the registration office? I’m pretty sure it’s possible, since I have already read it on the internet several times and have also been confirmed by Yamaha…. Thanks schonmal, Mfg. Comerz