Blaster "Un-serialed" motor Rare??

Blasterbuilder

New Member
May 30, 2011
132
1
0
Minnesota
Hi guys i just tore apart my current builds motor to replace the crank and i noticed the left case half doesnt have any type of serial number on it like the last 6 i have owned. And no it is not ground off or scraped away of any type

Anyone know anything about this??
 
If It Is Smooth And Flat And Not At An Angle Its Been Ground Off In Some Way , I have an 88-02 and 03-06 Bottom End In My Living Room And They Both Have Different Amount Of Number's and Letters !
 
Somebody Wanted a Smooth Motor Then , I looked Online To Find what I Could , And Yamaha never SOLD a Motor Without Number's , Not Saying its a Prototype or Similar , But I'm sure it came (Factory) With Numbers !