i bought a motorized bike and motor kit from bike berry I've been riding it but it shuts off when I come to a complete stop and is shaking like. Crazy anybody from the area that can lend me a hand so I can fully enjoy my present?
The link to the EXACT KIT you have have would be helpful if you want good advice.
In general though, the first thing you need to do for vibration is make sure your engine is mounted right by giving it the 'shove' test.
Hold the head with one hand, and the frame top bar above it with the other.
Then try to shove it back and forth AS HARD AS YOU CAN.
If it moves AT ALL, that is a fail and where your vibration comes from.
As far as dying at idle, that is just a clutch ajustment issue and there are tons of topics about that.
That should you get started on the right track but just note, a cheap crappy unbalanced kit engine will always vibrate some.
Even the good engines mounted right have some vibration, that is why I never use the kit grips, I replace then with foam BMX grips, with a little coaxing they will slide over the throttle barrel and no matter what the build is,you don't feel the vibrations in your hands ;-}