Posted by Joe S. on January 23, 2000 at 10:50:12:
In Reply to: Problem with F822 pistons posted by Costantino Volpe on January 23, 2000 at 05:14:07:
It is either a problem of corrosion on the surface of the #4 valve casing that formed when the instrument was sitting waiting to be sold (classic with Yamaha), a #4 slide tube going into the #4 casing that was bent down during shipping (classic with U.P.S.), or - if it actually is just the resistance of the airflow slowing the piston's return - the spring might be just a bit too weak. (Venting the #4 piston will NOT solve this problem. Your problem is "backwards" from any problems that venting would solve.)