Hi I’m thinking of buying a tdr125 from Germany and somebody told me that they are restricted to 80km/h just wondering if this is true? If it is true how do I remove the restriction 

back in the day i had a Tzr125. it was restricted to the 12hp learner limit by pegging the powervalve closed. other manufacturers used washers in the exhaust system i believe. 

to be honest, you are better off leaving the power valve closed. the bikes are a lot more reliable in that state.