Brakes - Suspension - Steering

how did you test the c.d.i. ?, as i said...THERE IS NO TEST, OTHER THAN REPLACING WITH A KNOWN WORKING C.D.I. FROM ANOTHER ATV OF SAID MAKE/MODEL !. now...you can try tapping on c.d.i. while cranking it, while watching for spark at plug.

lol...yeah ?..where were you when i had to bail off the ladder cuz the stand took a nose dive while on my trailer ?..rofl. that was soo much fun..messed up my already bad leg, got my right shoulder too..but after a few cold ones..i got better..lol. i can't thank my warn winch enough for getting my work done !. i had a snatch block way up in a tree back there..lol.

Looks like some fancy rigging there!

Go to the toolbar at the top of the page, click on 'service manuals"   Download the 2014-2019 TRX420 FA1 FA2 FA5 FA6 TM1 TE1 FM1 FM2 FE1 Service Manual   Go to page 13-20   You'll need something like this.  You can make your own or buy one.   https://www.ebay.com/itm/144190959908

Use OEM parts or chinese amazon/ebay stuff?  If you're using anything but OEM parts, first thing to do is put your original parts back on to start troubleshooting.