Tim Brockett of Branford Bike reports, "I have converted almost 200 Ergo levers in the last 18 months. Last week I converted a pair of 1992 Ergo levers to 2001 9 speed. Then I took a set of 1999 Athena levers and converted them to 10 speed."
Remember the bit of misinformation from Campy that said that only some 1999 levers could be converted? I have not found a shred of evidence to support that. In Campy's own literature, their spare parts manual, 1999 and 2000 Record 9 speed Ergo lever Carbon hoods share the exact same part number. The 10 speed carbon hood has a different part number but only differs in that it has "10 Speed" instead of "9 Speed" printed on it. Everything else is the same.It is complicated but quite interesting what Campy finally did. They made it possible for everyone with a Campy 8 speed Ergo lever to bypass the older 9 speed and go directly to the newer 9 speed. They also made it possible for anyone with a 1999/2000/2001 Ergo lever to choose from all 4 available shifting options: new 9 speed, old 9 speed, 8 speed and 10 speed.
The only option not available is to go from 1992-1997 8 speed to 10 speed--That requires a new lever. Try doing anything remotely similar with Shimano!
Branford Bike suggests replacing the "G" springs whenever a cam is changed. At 10,000 miles we recommend replacing both "G" springs and the Thumb Button Spring for the right hand shift lever.
Branford Bike also has two Campy manuals to give riders step by step instructions: MA-80-76 covers 1992 to 1997. MA-80-76A covers 1998 to present Ergo levers. They are $4.88 each.
Finally if riders do not want to do the repair/upgrade themselves Branford can do it for them. The cost of labor is $30.00, parts are usually $45.00 for an Ergo cam and 3 springs.