Partzilla Live Q&A with John Talley – May 8, 2020

John Talley continues his live Q&A series from home as the coronavirus quarantine has prevented him from coming to work at the Partzilla garage. 

John’s Live Q&A YouTube and Facebook sessions have been going on every Friday at 3pm Eastern almost since the quarantine began, and in this session many more motorcycle and ATV repair topics were discussed. Yamaha ATVs seemed to be the most popular subject in this particular live session. Check out some of the highlights from John Talley’s fifth live Q&A below, and tune into our YouTube and Facebook channels every Friday at 3pm EST for the next Partzilla live Q&A.

Partzilla repair questions answered

Partzilla Live Q&A Highlights – Yamaha ATVs

Yamaha YFZ450

I have a 2017 YFZ450R with an intake and full Yoshimura exhaust. Do I need a programmer? 

John Talley: That’s going to be borderline. The 450R is already a high-performance machine. You’re asking a little bit more out of it. In the ECU with all its sensors, it has the ability to change the fuel trim to adjust whatever conditions you’re in. By doing the intake and the exhaust, you’re probably at the limit as far as what it can compensate for, so you may want to go with a piggyback on there to … adjust the air/fuel ratio just a little bit more. 

I have a 2005 Yamaha YFZ450 with a brand new battery, starter solenoid, kill switch and key ignition that won’t start. When I click the starter button nothing happens. Any suggestions? 

John Talley: Well at this point, you probably need to get some test equipment here, and at the very minimum you need to pick up a test light… If you know your battery is good and it’s over 12 ½ volts, as long as that’s a known factor then I would check the fuses, use your test light to go to the solenoid, make sure you’ve got power on one side, and then it should be transferring it over to the other. If you’re sure you’ve got power, then you can start working backwards. Start looking at the switch to see if it’s making any type of continuity test on it. Make sure it’s making a contact in there. Yours sounds like honestly it’s going to be the fuse

Yamaha Raptor

I have a 2008 Yamaha Raptor 700, and sometimes when I change it to gear 2 and I accelerate, it changes into gear 1 without me doing anything. Any advice?

John Talley: So you’re telling me it’s actually dropping from 2nd gear down to 1st? Sounds like one of your shift forks is potentially bent, and by doing that you’ve also probably damaged your synchros, so the forks are trying to hold that gear in there, and you’re getting all the power and it’s letting it pop back. So unfortunately you’re probably going to have to crack that one open and take a look at your transmission with the synchros and the shift forks themselves. 

Yamaha Grizzly

Are all the mechanics on a 2009 Grizzly 700 all the same? I notice different model numbers and I assume they are color codes. Is that correct?

John Talley: For the most part, yes. It’ll be different color codes and/or different levels of trim. As far as the mechanical part of it, they should all be the same.

Want to see more live repair questions answered? Watch John Talley's live session from 05/15/2020 below, or see all of John’s Live Q&A sessions here.  

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