funkflex

Ive had both in the past. That said, id go with the 560. It's the one bike I wish I never sold.

abarth

You are correct. Must be the shorter wheel base that caused twitchy handling on the '85 660 and not less fork rake.

Lenton58 

Bianchigirll:
I had issues with that feature ... got a frame maker to braze on a cable stop and ran the cable outside. Issues gone. My 560 is a purple '85. From memory ... 501 main tubes, True Temper stays, Tange forks and steerer. I stuck my foot in the wheel a couple of times and then learned. It's a stable, solid ride, but I don't go around with both hands off the drops — ever. The original guppo was Cyclone.

916: It's a shame that your LBS's don't have the skills to do such a basic thing as cold setting and drop alignment. Perhaps it is the sign of the times in regards to the new materials, but it is the same thing as finding a car mechanic who cannot do an ignition tuneup on a car/truck with a condensor and breaker points distributer. Legacy technology should remain in their purview. Perhaps you'll meet local enthusiasts who will be able to do it for you.

Bikedued

I had an 83 501 tubed 560 and I never found it to be twitchy at all? I also had an 87 Prelude that was a hotrod in both handling and acceleration. One of the only bikes that I could pop the front wheel off the ground repeatedly while accelerating from low speeds(seated, not standing!). It was a blast to ride and looked great to boot. Even Kurt liked it IIRC!? hehe. So, I would probably take the Prelude over the 560. The Tenax Schwinns are the most under rated road bikes of the 80's IMHO.,,,,BD