My kisbee rs50cc was bogging down losing power web accelerating, changed oil, plug & cleaned the carb with no joy. This sorted my problem as it is the cheap Chinese coil which isn't great
Fitted this coil pack because I had one before. It worked great for two week's then died two blocks from home, so I ended up pushing my scooter all the way home.I then refitted my standard one and the scooter started straight away.It may of been just an odd faulty one but still annoying