So I have a Sparta Buddy with the Sachs 504/1A engine. Bike is in good shape. When I bought it the guy did a good job replacing any worn part, adjusted the timing and replaced the clutch plates. He showed me the basics.
After having put maybe 75 miles on it I have noticed a few things and was hoping for some help from you guys.
1) The bike takes off alright and tops out at 30. At 10-12mph the chain kind of shakes and it feels like the clutch is responsible for it. Its kinda rough. I know its a one speed, so I know its not changing gears. It only lasts for 2-3 seconds, and then smooths out. Other wise its fine, idles well etc.
Is this roughness for a few seconds normal? Should I be concerned.
2. Second, I hear a faint high pitch noise that sounds like its coming from the cyclinder. Compression is fine. It comes and goes. Could this be bearing?
3. How much slack should be in my chain?
Thanks in advance!