Partzilla Live Q&A with John Talley – June 26, 2020

Partzilla live Q&A returns once more with master mechanic John Talley answering more of your motorcycle and ATV repair questions. 

Yamaha ATV (especially Grizzly) electrical system problems once again dominated the conversation for the 2nd week in a row. Some of those questions and answers are highlighted below. Check out excerpts from John Talley’s latest live repair Q&A session, and tune into our YouTube and Facebook channels every Friday at 3pm Eastern for the next edition.

NOTE: We experienced technical difficulties during the live broadcast, which caused delays in the video, but the audio is clear. Technical difficulties also caused the session to be broken up in two, and both parts of the live Q&A are included above.  

Partzilla Live Q&A with John Talley 06-26-20

Partzilla Live Q&A Highlights – Yamaha ATV Electrical System Questions

Yamaha Grizzly Electrical Problems

I’ve got a Grizzly that’s not charging. Can I put aftermarket parts on it?

John Talley: I assume you’re talking about using an aftermarket stator or regulator-rectifier. I would probably shy against that, especially with those two, considering they are so important as far as keeping the machine at the proper voltage. I’d be afraid to use anything aftermarket if I were you, but it’s your call. There are so many things that are centered around having the correct voltage. I would be a little leery, so think twice before you do that. 


I’ve got a 2016 Grizzly 700 and it won’t charge. If I replace the stator and regulator, would this cure it, and is it ok to use aftermarket parts?

John Talley: I think we already addressed using aftermarket stuff. And if you would, go through and test your regulator and your stator before you go replacing everything, because chances are it’s going to be one or the other. It probably won’t be both, but there’s one other thing you need to take into consideration, and it’s a long-shot, but I’ve actually seen it, is you have to make sure the actual wiring harness on the unit is up to snuff. As far as going aftermarket, just be wary because as I said earlier, everything centers around that vehicle having the correct voltage. Not too high, not too low, so be careful if you decide to go aftermarket. 

I need some help with a 2003 Grizzly 660. The display was not coming on when turning on the main switch. I moved the wires a bit and the display came on, then later I heard the machine trying to start itself with the kill switch and main switch off. Turned on the main switch and it started, but then I shut off the main switch and it continued to try to start and the killswitch would not shut it off.   

John Talley: Boy, do you have a main harness problem! There’s no doubt. Something has gone wrong somewhere on the main harness, and you’ve got wires making connections when they absolutely shouldn’t be making contact. We actually have a Grizzly 700 that had a similar condition just on the start switch. It was actually melted in there and the wires were making contact. Unfortunately, you’re going to have to pull the plastics and find out what’s going on because I guarantee you there are going to be some burnt wires or some wires that got so hot that they are actually connected inside of that harness somewhere. That’s not going to be a whole lot of fun but you’ve got no other choice than to start picking that apart. 


Want to see more live repair questions answered? See all of John’s Live Q&A sessions here.  







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