Yes they are, but I'm not entirely sure on the 84's. If its an earlier gen '84 with a metal tank, it isdefinitelyrunning a 6-volt system.
Its between an 81 - 83 model, in 84 Yamaha went to a 17 digit Vin number. Hope this helps. I have an 81 Virago with a 9 digit number on the frame and engine as well.
84
The LCM is 2268.
81 and 84 both go into 6804. The LCM is 2268.
3x-84 = -81
83
He was 84
81 84 87
No, 9 is not a factor of 84.
For 98 78 86 88 84 81 93 92 89 and 81: σ=6.2361
81 - 3 = 78 81 - -3 = 84
The GCF is 3.