I have an Arctic Cat 07 400 that I just rebuilt the top part of the engine and now on the display is 2 triangles and don't know what they mean can someone please help me out with this

 

you might want to try pulling the green fuse, or the battery for 5min to "re-set" your cluster. They can sometimes wig-out for no apparent reason.

If that doesn't work re-trace all your wiring. If you had it all apart, either something isn't plugged in right, or you may have a dead short against the frame somewheres.

my 2¢

good luck.