Hello, I have a Hercules Prima 5 built in 1995 which has only about 14,500km down. Model: 634 I have the following problem: It doesn’t really come on full-gas (sounds like half-gas) and has quite strong speed fluctuations. I have already done the following: -gasifier cleaned, air filter renewed, carburetor needle hung high down… -Other cylinder built on it because I thought the old “wasting” is -New piston+All seals including Simmerrings etc. -Other clutch and ignition tried -Electronics checked and the spark (funke blau lilac) -New oil pure etc. And changed the exhaust (have still a Dkw here so I simply “rebuilt” but also did not use anything. However, when trying around I noticed that on the cylinder there was electricity on it (was a cable pull on it that I wanted to take away there I then saw the spark flying) But only once. Have not yet had any round because I have painted my rim and have not yet built it. I am really finished with my knowledge! Please help me, do not want to sell the good part.