[50mhz] FT-650 Key Clicks

[N3XX]

Sorry if this is a little off topic, but it's related to a FT-650 I have 
recently acquired for use on 6 Mtrs.
Posted to the Yaesu list, but no response there.  Hoping I might find other 
users of the FT-650 here who have already tackled this problem.
Have been pretty pleased with this xcvr until someone pointed out to me that 
it generates pretty bad key clicks.

I have tested on all three bands, 12-10-6 Mtrs. and had the same result.
Transmitting 100 watts out on the antennas I have for all three bands, and
receiving on another receiver with no antenna connected I receive a little
over S9 signal when tuned to the transmit freq.
When tuning the test receiver away from the xmit frequency, I quickly lose
the CW tone, but clicks continue as I tune farther away.
At about 4 khz above or below the xmit freq., I'm still receiving the clicks
at S1 on the receiver s-meter.
Tuning the receiver farther away from the xmit frequency, I get no s-meter
reading, but clicks are still audible until I get to about 12 khz above or
below the xmit freq.

Any FT-650 owners on the list who have had the same problem, and know of a
fix?  I have found info about key click fixes on the FT-1000's and MP's, but
nothing so far for the FT-650.
Thanks for any help.

73,
Tim - N3XX