Looking to find age of yamaha bike using serial number

Mentioned here at the bottom

https://www.shopyourway.com/questions/1041116

and
What year was my Kenmore dryer made? To determine the age of your appliance, use your serial number (not model number) to find date of manufacture. Our serial numbers begin with two letters followed by six numbers. The 2 letters at the beginning of the serial number tell you the month and year it was made.
How old is my dryer by serial number? You can determine the age of your appliance by looking at the serial number on the nameplate. The first number indicates the year of manufacture, and the second and third digits indicate the production week. For example, 13500016: week 35 in 2001.
How can you tell how old a dryer is? To find the age of your appliance, use your serial number, not the model number. There are two letters followed by six numbers in our serial numbers. The first two letters of the serial number tell you when it was made.

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Google "mongoose serial number". That is what anyone here would have to do to answer your question. You may or may not be able to determine the age from serial number, but bike condition is far more important than age..

GDay mate

Took a bit of scrounging bout the net, but I eventually found it!!

You can look at the parts diagram/part numbers for the old girl here

A rating and feedback is a great way to reward me for my efforts to find this for you. Cheers mate!!

regards
robotoek

Don't know how to look up by serial number but if you have the VIN number, you can look up the bike at this site...
http://www.pronto-net.com/vin_app/vin.php
and get lots of info on it.