Thanks Tom for the kudos! All of the bikes have 80cc (70cc) King's motors. The best upgrades so far have been the new style clutch lever (all but the top bike), chain roller (inline skate wheel), and 510 BMX chain.
The bike I think Cookie is refering to is a Trek "Classic" and they are 229.99 msrp, come in a 21"; in vivid blue, candy red, metallic bronze, and metallic black/dark silver. I just took a look at one on the floor and I'm not so sure an engine would mount in easily...maybe. The womens bike could take one though I think. This info is in regards to the '07s only.
Not that anyone needs a new bike, but just to fill in the information gaps for future reference.[/b]
That was my guide roller in the link Cookie referred to. After re-reading that it does sound complicated. Using a seat clamp like you did is nice and clean...easy too. :grin: Having that roller sure keeps the chain rolling smooth.
I like your bikes. They look comfortable and safe with plenty of brakes. I've got a drum brake setup to put on one of these days.