I have been trying to figure out what years the yz's were yellow/black? bikepics.com has got some many dumbaxx's posting the wrong model, year and bike everywhere i dont believe whats on there..... I thought they were yellow until '84, and 85 was the 1st red/white???? Also holy crap do the late 70's model yz's bring alot of money!!! i see average/not raceable ones going for well over $1000!!!! and semi-restored ones are usually 2k or more! Oh yeah if you know what year they went to the single swingarm i'd like to know that too!