Hello and good evening to the forum, I have been to Motor-Talk several times and had to register again because I was not here for a long time. But since I was always well advised, I hope also with my new project on good tips from the community. At that time it was always about a little bigger “mopeds”. But now I got a real moped, a Generic trigger SM50 which I want to bring again to the road for an acquaintance. The engine was changed times for a CPI Mo I don’t know which CPI. As far as I have read in the Inet an AM6 replica. On the engine stands CPI 51A *xxxxxx* but tells me nothing and I can’t find anything about it. Now to the construction sites I hope for tips or experience values of you. The main problem is that it is difficult to switch at all. The 1st course can’t be put into idle or higher. In the stand, with the engine switched off I can sometimes force the 2nd course. . The engine itself is running well, has stationary gas and I can start in the 1st quite normally. I noticed that the transmission oil is white in the clutch cover and is extremely foaming. According to Inet this should be due to a defective Simmering of the water pump. Can this be the cause already? Since the transmission oil is diluted and therefore the clutch can not work properly? But I fear that would be too easy. Now since you asked. But please don’t come to me with craft shop or the same. mir kennt… About helpful answers from AM6 Schrauber’n I am grateful….