Welcome nightrider to the forum
Glad you could join us.
I have gotten seven kit's from King's and have been very happy with them. There is no 80cc it is more like 67.5cc.
Lot's of people from this forum are very happy with ThatsDax, and he sound's like a cool and helpful guy. I believe any more kit's that I get will come from thatsdax.
Here is the link for ThatsDax
bicycle engine kit, bike engine, bicycle engine, bicycle motor