Ok so i just bought a mxz 800 2002 and took it for about 4 ride and didn't have any problem... but the last ride i made, all the lights (dash, headlight and brake light) became really weak (every light was working but they were so low that I could'nt see anything in the dark) and the rpm was going crazy like I was going at 6-7k rpm but the rpm was bouncing from 3 to 4 to 2k rpm

So yesterday I check out all my wire and everything seems fine to me and I change my voltage regulator for a brand new and it didn't change anything

The snowmobile is still running fine.
I need help lol