Hi everyone I am building a 1978 Yamaha xs 250 I purchased some new coil a few years back does anybody know if the x2 terminals matter which wire goes on what as there are no markings ? Also I have been looking on line and the price of coils seem to vary in price from £15 each to £30 each has anyone else experienced this ?

1/ shouldn't do so long as they coils are the same

2/ compromise between cheap and nasty and cheap but good,