Howdy - I'm a new member. Use the ATV around the home front only, but I use the hell out of it.

The electronic shift just stopped working. Checked all the fuses, no problem. Replaced the main switch module too, but it still doesn't work.
I have the machine on a trickle charger and it starts fine. I'm thinking maybe there's another electronic component burned out, but I don't know. Any advice?

 

I have the exact same ATV. Mine was not recharging the battery while I drove it, it drained a brand new battery in 5 hours. If I charged the battery, everything ran fine until the battery was drained again. I suspected it was the Stator. I bought a Clymer service manual and checked it step by step, using a voltometer, and it ended up being the Regulator/Rectifier located under the rear right fender well. Brand new they cost around $65, but I got a used one on Ebay for $15. Was really easy to change, only took 10 minutes. Everything has worked fine since then.

I'm not sure if this is what yours is doing. I know that on the ES models, especially 1998 and 1999, they are huge battery hogs. If everything isn't running top notch, they will go through batteries really fast. I would suggest checking to see if the battery is getting a return charge. Use a voltometer while the engine is idling, and then see if it raises when you rev the engine. If it holds constant then you aren't getting any juice back to the battery. That's how I started to figure out my problem. Hope that helps.