I have a honda xr 100 it has no spark. I changed the spark plug and nothing. i know the altornator works???

Question

(help)

Answer 1

Based on your question, you have a zero understanding how an engine operates. You need a Chilton or Hayes manual. It can walk you through the steps, and tell you what tools you need. It's fun to learn. If you need to get the bike running quickly, take it to a shop.  

Answer 2

There is no alternator, it's a stator. It is possible that the stator is charging, but the ignition is not. Also coil could be shot, even the plug cap.

Answer 3

Are you sure that the red RUN/STOP switch is in the "RUN" position??