Voltage regulator
 

I bought a new voltage regulator for my 127 from CC Specialties. I will try my best to explain this. On the original regulator the white\black stripe wire went to the GRD, yellow to the F, green to the GEN, and the gray to the BAT. On the new reg I put the green on the post that has GEN, yellow to the F, gray to the BAT, and the white\black stripe to the L. When I did this the white\black stripe wire started to smoke. Can someone please tell me what I did wrong. Am I suppose to leave a wire off. I did order the the regulator they suggested. Thank you for your help.

To work properly the regulator case has to be grounded.
Some regulators such as your old one have a GRD lug for a ground wire. Regulators without a GRD lug get their ground through being bolted to the metal chasis which is grounded.
Some regulators Have an "L" lug which stands for Load. It is used for such things as accessories or lights. In other words, it is hot with 12 volts.

If your white/black wire has ground at it's other end, and you have connected it to the "L" lug, you have absolutely connected a direct short from one of the regulators battery ouputs to ground.
So yes the wire will smoke.

Remove it from the "L" lug and attach it to one of the regulator mounting bolts, and if you haven't fried the regulator you should be OK.

By the way, the wire on "GEN' is blue but they fade with age and may look green.

Link to wire diagram....
https://www.onlycubcadets.net/forum/showthread.php?t=35

Thank you, I finally got to wire it like you said. Now it works like a champ.