To my vehicle, brand : Longsia Firefox 2 clock type: LJ50QT-M Built: 2011 Km stood : 4890 Ps: 2 Hope that’s enough info ?? So I bought the thing from a pensioner to drive cheaply to work. First problem was that the scooter at the bottom of the gassing fuel lost drips, so I didn’t know anything about it. e new carburettor bought. Roller runs until now… also more or less adjusted the carburettor.. Air filter is also cleaned. New candle and even new candle plug mounted. Roller still runs. Jumps great in the morning to no problems only and now we come to my main problem, which comes no longer out of the quark.. . End speed at test drive then 55 now currently Max and with tailwind almost 40!!. Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa On some days I manage 30 the mountain other days Max 20 or 25… that’s annoying… because I don’t want to go to an overpriced workshop I hope of course you can help me somehow even if I don’t have a plan… have tried a lot to google and so I don’t know what or where Vario is, nor what with weights or membranes… I hope you understand what I want from you Thanks already in advance