Multiple REAR SHOCK part numbers on Valks 1997-2003

[Mtn Valk]

There seems to be multiple rear shock part numbers for Valks made between 1997-2003.
The 1999 Tourer and 1999-2003 Standard shocks APPEAR to have a new part number of MZO-A41.
Valkyrie Interstate shocks APPEAR to have had only one part number of MBY-671 for their 3 year existence (1999-2001).
Does anyone out there have an Interstate with a part number different than MBY-671?

I'm trying to determine if somewhere along the line Honda substituted MZO-A41 for MBY-671 on any of the Interstate models. Better yet, why did Honda change the part number in '99 from MZO-003 to MZO-A41. Thanks in advance to all who participate in this thread.

[BonS]

If this post was a poll then you'd know how many folks had checked and simply have the MBY-671. I would be one. Mine's a '99.

[Mtn Valk]

I reckon the poll was a success. At least I'm fairly certain the MZO-A41 shocks I received from Pinwall that came off an Interstate are for Standard & Tourer models ONLY. Thanks BonS!