re: Researching for the best motorized bicycle kits
Hi Marv, welcome, I'm also new to this and did some checking on most motors sold, I got mine from Gasbike.com in canada, only ones that would ship to california, it is a ZB80 and is 66cc they also have 49cc motors, these kits come with upgrades most don't have
they come with 2 or 3 motor mounts to fit the different down tubes on the bikes, it will fit my mountain bike with no drilling the frame, and they come with extra parts and color directions (: can't beat it. I paid $87 for the motor on ebay with shipping for $111, if you don't fell like bidding on ebay you can buy it now for #134.00 free shipping.
These are new 2010 motors.
I'm 60 and remember my first motorbike with a snowplow engine man did it fly!! I was 10 and very brave, not so much now.
Good luck Marv, Mike