I have a trx 80 and was riding thur long grass after I turned it off no spark when I tried to start so I have a new cdi box and new plug wire

 

The 90 is electrically one of the simplest there is. Just Googled it and got https://www.caretxdigital.com/ scroll down a fair way to get to the drawing. Electrical tests are similar to those described in the help diagnose stator sticky, in the Chinese engines section of this forum.