bluespenny

Just found a mint-condition 1973 CCM Elan three speed, similar to Raleigh Sports of same era.
It's in shockingly good condition, expect when I ride it, it seems to pull to the left. It's only really obvious when I take my hands off the bars, but my other five bikes don't do this. It's so clean and unused, that I'm sure it hasn't been crashed.
So where should I start?

sheba

Good luck. I put together a single speed commuter about a year ago with an old
giant steel frame, and it does the exact same thing. Several LBS's could not figure it
out and I have no clue. I pretty much just never ride with no hands.

Coyote2

Check the headset.

Gonzo Bob

The most common cause is bent forks slightly offset to one side - in this case the right side making it pull left. It could also be other misaligned tubes on the frame - i.e. head tube not aligned with seat tube. Or it could be one fork slightly shorter than the other. You could try to bend the forks a little to the left.

Artkansas 

I've had that when the headset bearing race on the fork was just a tiny bit off level. And when the fork itself was a tiny bit bent.

San Rensho 

You need to check the frame for straightness. For the forks, the only way I know of is with special drop-out tools.

For everything back of the head-tube, the string method works well. With the bike in a stand and the rear wheel off, take a thin piece of string and wrap it around the head tube so you have two long legnths of string going back. Pull the string on the right side tight and lay it against the inside of the right rear drop out. Keeping the string taught, move it inwards until the string just touches the seat tube. Now measure the distance between the string and the drop out. Do the same for the left side, both measurements should be the same. If they aren't, you need to bend each rear triangle so the distance is the same and at the same time, making sure that the dropout separation is the same.

FarHorizon

+1

Seen this lots of times - fork damage that is too minor to see with the naked eye will cause "pulling" in the steering. Your LBS should have tools to check the fork. Let them bend it back to true and it'll be good as new. (NOTE: last sentence is NOT applicable to carbon or aluminum forks!)

Goldnblazer

Maybe it is a NASCAR edition setup for left turns.

I did have an old steel frame bike with steel fork quite a few years back that did the same and it was the fork.