I have just bought an RT and its beautiful, heaps of fun to ride and nicely put together, not cheap like some others. As for speed increase I am stock at the mo but am looking at the 150 upgrade kit. Which MZ sells at their website. Also I have a question. I use this as my daily trasmortation and in the rain it kicks up a lot of water from the back tire that roosters mud etc up my back. Does anyone know of an aftermarket mudguard kit for the back wheel? I have seen them on other bikes but canĀ“t find one for the RT. One of the ones that conforms to the back wheel and just covers it to knock the spray down.