If they are both the same engine size, stock, and running right the New 2stroke YZ will dominate a 1980.
yz 80 B
yz 125 use the same plastics from 1996 to 2001
18 ft. lb. From owners manual of 1981 YZ 465 H.
inicion electric sistem
nada.com or kbb.com
Probably about 50-60
The type of carburetor on the 1999 Yamaha YZ 125 is Mikuni how ever the sub model is either VM TM or TMX
$3250
60-65 mph stock
Nothing; it's a model designation, like YZ.
1lx-00 is a Yamaha yz 125 -86
Not likely, ttr 125s are 4 stroke and it is a trail bike. a yz 125 is a 2 stroke race bike. yz 125s are worth more unless you trade for a older model then the ttr. its posable but highly unlikely