Reply posted in the Wanted thread. I've got a heap of other 125E bits floating around, too.
I'm looking for a X tank too BTW.
For the 125s:
C = 1975,
X = 1976,
D = 1977,
E = 1978.
The C & X are the same basic bike as each other.
The D & E are the same basic bike as each other.
The later bikes are a big step foward, but the older ones are prettier....
The YZ100, 175, 250 and 400C were all yellow in Australia (not sure how many of the 100s or 175s made it here though). The 125X should be called a 125C, and the 125C should be called a 125B. But they're not, so...