Partzilla Live Q&A with John Talley – May 14, 2021
Partzilla Live Q&A is back again with John Talley answering your motorcycle and ATV repair questions.
This week’s session had to be cut short due to a prior commitment, but John had enough time to answer a handful of your questions, including a few Yamaha ATV questions. 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 Highlights – Yamaha ATV Questions
What do you think of the 2002 Yamaha Grizzly 660?
John Talley: That was a groundbreaking machine. I like the 660. As long as you really maintain it correctly. They get a little particular especially if you let the oil go a little too long. I’ve seen it score the cam lobes, just generally make a mess out of things. Their cooling system is very particular, and if it gets out of whack it’s going to overheat. But overall it’s a decent machine.
I have a 2010 Yamaha YFZ450X and the injector keeps getting clogged. The tank has been flushed and all seals are tight. Any ideas?
John Talley: Have you checked the screen that goes into the bottom of your fuel tank pump? Because if it’s cut or dislodged or not connected or worn out, it may be pulling in debris from inside of your tank, or actually if it’s breaking down, it may be the culprit, going up through the system and stopping up the injector. I would say look at that little filter. It’s actually a pad on the bottom of the fuel pump itself, to see if it needs to be replaced.
What you think about deactivating the AIS (secondary air system) on a Raptor 700? I deactivated mine and now it’s throwing flames out of my exhaust system.
John Talley: I think you just answered your own question. It’s evidently sending unburnt fuel instead of recirculating it through the AIS system. It’s sending it out through your exhaust and turning it into a blowtorch. If that makes it more fun for you to ride at night, then go with it. It’s probably not going to hurt the machine, although you’re probably going to have to repack your exhaust sooner than later because that’s eventually going to wear it out.
Want to see more live repair questions answered? See all of Partzilla’s Live Q&A sessions here.