I took the Masi out for a brief test spin around the neighborhood this afternoon. What a sweet-riding machine! Similar to the Bianchi, but seemingly more sprightly. It's a good fit for me too, which was the whole point.

Unfortunately I got only 2 blocks from the house and heard the chain acting up. It's flopping around loosey-goosey. So I limped home. The RD was working when I rode with it on the Bianchi over to Harris Cyclery two weeks ago, and when I moved it over to the Masi last week.

On further review, which is to say on dis-assembly of the RD, the ruling on the field stands. There is no irrefutable evidence to overturn the ruling that the Cyclone's pulley cage spring has broken.

So here's the question. This is a Mk 1 Cyclone. Would a spring from another Suntour RD such as a V-series work? (I'd hate to ruin a good V-series derailleur though.) I know the Mk2 Cyclone used a unique spring. But it's been a long time since I took apart a V of any sort and all mine are currently in use.

Would any of you have a spare spring? Or know of a good source for one?