Partzilla Live Q&A with John Talley – October 02, 2020
John Talley is back for another Friday afternoon edition of Partzilla live Q&A, taking on your powersports vehicle repair questions.
Just like last week’s session and several others before it, Yamaha ATV repair questions once again dominated this session. However, a good variety of Honda, Suzuki and Yamaha motorcycle repair questions also came up. Check out 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 – Motorcycle Repair Questions and Answers
When I start my 2011 Yamaha R6, it fires up cold, but after the temperature reaches 135, the RPMs start fluctuating and it starts bouncing around and the engine will die. It misfires at low RPMs. I replaced many parts, including the fuel filter, but the problem is still there. What else should I look for?
John Talley: What I want to focus in on is the fuel filter. Because this really sounds like a fuel-related problem. Just because it has a clean fuel filter doesn’t mean that there isn’t a problem somewhere with the fuel system. What I would be leery of at this point is the actual fuel pressure, so you need to see what the pressure is at just idle, and then pop the throttle a little bit and see if it’ll hold it. … You need to find a fuel pressure tester. I’m sure we have them on Partzilla.com, but this may be a one-time use so I would ask around … that tester will work on any unit with fuel injection, so that’s the direction I want to point you in. … I don’t think we did a video for the R6 but I’m pretty sure we did a pressure test for the GSXR-1000, so if you would, reference that …
I have a 2007 GSXR 750, and the secondary injectors aren’t spraying at all , just the first injector to the left is spraying. What causes the injector not to spray?
John Talley: One of two things, either A. it’s not getting enough pressure or B. it could be stopped up. And with these injectors you’re talking about, you can actually clean those and we have a video showing you how to do that with a little kit they have from Motion Pro …
I bled the rear brake in my Honda CBR 600 RR, but the pedal has a lot more compression and it feels like too much compression. Any thoughts?
John Talley: So it feels like it’s harder to push the pedal and it’s not really engaging on the slave cylinder as well? I would probably pull apart the brake caliper itself and take a look inside. Sounds to me like maybe those bores are trying to hold back a little bit and not fully engage with the pad, and then not release either.
Want to see more live repair questions answered? See all of John’s Live Q&A sessions here.