OK, so the number on the frame, stamped into the headstock on the right is the same as the VIN. There is also a 'YM' stamped slightly higher than the frame number (I'm guessing this is a reference to Yamaha??. The ADR plate says 08/90 and then the VIN.
So, the evidence appears to point to either a 1990 (assuming the 08/90 on the plate is date) or a 1991 according to the VIN itself. And an 'E' because it most definitely doesn't have a kicker - that bit I'm pretty sure about!
Now the 3WR didn't appear in Aus (according to the link) until 1994 so.... I'm none the wiser...
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