1990 fourtrax 300 no power no lights

[Adamb2025]

I have a 1990 Honda fourtrax 300 2x4

I rode the other day for 30-45 min. Switched it off and now it is completely dead..
battery is fully charged, fuses are good . WILL NOT TURN OVER ,
headlights won't turn on , No neutral, reverse or oil temp lights . Electrically it is completely dead !!! I replaced the key switch and CDI box , STILL NOTHING.
I bypassed the neutral safety switch and grounded it to the battery and still nothing !! I used a jumper wire on the starter Solenoid , the motor will turn over but not start . I even bypassed both fuses and straight wired it to see if I could get a neutral light or headlights still nothing . What could it be ?

[Mech]

You need to use a test light and trace the power feed to the key switch and onward.

Check power is getting to and through the key switch.

[Maddman200]

Check and make sure you have good clean tight grounds. Hopefully it's something that simple

[toe420]

I have seen some temperature specific issues from old stators, coils etc. Check the basics.