Re: Looking for cheapest reliable motor.
You can get decent/cheap 66cc engines from thatsdax.com and rawmotors.com. If you're willing to put in the extra money, I'd suggest not buying a kit and instead just buy the engine and get better quality parts. The kits will work, but in my experience the engines work great but the parts that come with them are junk. If you want something cheap and somewhat reliable, you'll need to spend the extra money in getting quality parts. A kit will get a bike running, but be prepared to gradually replace ever cheesy part that came with the kit.