Hi,
One of our factory test bikes is the Schwinn DelMar. We have hundreds of miles on it without any issues. We orginally installed the kit without the chain idler, but due to chain stretch and the clearance of the frame we are going to use the idler. Because of the frame I.D. where the idler needs to be attached we will alter the mount to avoid the idler moving inward and destroying the rear wheel. Before we ever started the bike we installed a second front fender brace to avoid the fender dropping onto the tire when the tab breaks [PLEASE address this issue to avoid injury]. Both the Schwinn DelMAr, and the Huffy Cranbrook need the front fender issue resolved.
The Schwinn is a solid ride, great handling, vintage looking, and we think a good choice for a motorized ride.
Our next modification will be installing a springer front fork and of course a front brake.
We installed the 49 CC HS four stroke, and the Q-Matic drive, and it was easy to install and fit well. The only other change was to use the 1" shorter pedal crank [5.5"] & pedal extenders to clear the 4 stroke motor.
200 MPG, over 30 MPH, great sound, sharp looking, and trouble free, just doesn't get any better than that!
Have fun,