Partzilla Live Q&A with John Talley – January 28, 2022

John Talley is back for another edition of Partzilla Live Q&A, answering your motorcycle and ATV repair questions live.

Electrical and starting problems came up several times during this edition. Check out some excerpts from Partzilla’s latest live Q&A session below, and tune into our YouTube and Facebook channels every Friday at 3pm Eastern for the next edition. 

Partzilla Live Q&A with John Talley 01-28-22

Partzilla Live Q&A Highlights – Electrical-Starting Problems

Honda ATV Starting Problems

Great video on the Honda Rancher 420 no-start. Any suggestions on if when you turn the key, the dash and head lights come on and the starter will cycle but not the fuel pump? All fuses are good and it only did this when the temperature was -20 degrees. I pushed it in the garage and 30 minutes later everything was back to normal.

John Talley: Oof! Where do you live? At minus 20, it would not surprise me that the electrical system was so cold, along with that motor that’s inside your fuel pump to where it couldn’t operate. I don’t have a solution for you and I don’t think Honda really took into consideration operating these machines at minus 20 degrees. I guess you’ll have to roll it inside, pre-heat it and then go ride, but wherever you’re going, don’t shut it off or you might not be able to get home … 

Yamaha ATV Starting Problems

I have an 08 Yamaha YFZ450 that sometimes starts and sometimes doesn't. It’s completely random when the button works. What could be wrong? 

John Talley: Well, I think you’re kind of circling around it right now. I believe we did a no-start condition on the YFZ450, the 08 or 09 that belongs to my son, that’s in our corral. But it sounds to me like it’s more than likely the start button itself. I do run through the necessary diagnostics … the video should be able to guide you in the right direction. And if I’m wrong and we didn’t do a video for it, check out the one for the Honda 400 EX, because it’s a starting system. You’ve got a key, you’ve got an engine kill switch and you have a start switch. It’s just a matter of going through those three and making sure you don’t have a problem with either A. the starter or B. the starter solenoid, which is usually attached to the side of the starter on most machines or located next to the battery. 

Charging System Problems

I think my stator just went out because the check engine light on my bike just shut off on me at a stop light when I was riding, and it threw a code 46. Is that for my charging system? 

John Talley: Well, it’s probably not going to be your stator. It happens occasionally but nine time out of 10 it’s going to be your voltage regulator-rectifier, so take a peek at that first. We’ve done a bunch of videos on how to test them that are vehicle-specific, but I think we did a couple of videos just for charging systems and I think we looked at stators as well, as far as reading in and doing a static test to see if they’re working correctly. So if you would, check out those videos … 

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


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