Sidepiper with second frame number

[FAT-TOY]

   Rebuilding my sidepiper and while preparing the frame for powder coating I removed the ID tag on the front of the headstock and I noticed a second frame number underneath.  Anyone know the reason for this 4 digit number?  I thought it might be to identify the actual year of manufacture, as the tag lists the frame and engine number etc but it only lists the year as ( 196_ )
                                                                                                   Zane

 

[monte34]

Zane, my frame had the same series of numbers under the ID tag as well. I didn't take a note of what they were but I guessed they were just an internal record of annual production perhaps. My tag has all the usual numbers as well as having a 9 stamped in the year section.
By any chance would you have a spare column for the steering head, I don't need the triples just the shaft.
Cheers, Rob

[FAT-TOY]

 Sorry Rob very few spares.  When I got the bike it was almost complete and very original but sadly not to many extras, bar maybe a couple of coils and a extra rear sprocket which are about the same size as a car dress rim.  If you can't find one then it shouldn't be to hard to machine a new one.

                        Zane

[Mick D]

Hi Zane, just checked my model 381 73 CZ400,,,,,,,,,,,,,,It is blank under the tag,,Zilch-a-muodo,,blank as it gets