Partzilla Live Q&A with John Talley – January 14, 2022
John Talley returns for another edition of Partzilla Live Q&A, answering your motorcycle and ATV repair questions live from the Barber Motorsports museum in Leeds, Alabama.
Partzilla Live Q&A Highlights – Honda and Yamaha ATV Repair
Honda ATV Repair
Have you done a fuel tank removal and cleaning on a Honda TRX?
John Talley: Not specifically, but it shouldn’t be any more difficult than any other ATV as far as pulling it off. On just about every TRX, it’ll have a strap in the back and usually one or two bolts up front, right at the steering stem and once you get it off, you’ll have the petcock, if it’s indeed built into the bottom of it, that’s going to have a screen at the bottom of it that’ll give you room once you get it out to drain it completely. Because trying to drain it out at the top, you have that filler neck that extends down in there and it won’t let you get everything out. If you pull the petcock out, it’ll let the rest come out.
I have a 2007 Honda Rancher 400 and when I start it up and go to take off, it gives a hard knock, almost like the rocker arms are hitting the valve cover. Any thoughts?
John Talley: Wow. That scares me. It sounds like it’s coming from the top of the engine. I think it’s time to go ahead and pull that valve cover and take a peek. If you’re hearing something that dramatic, that may be the case. Something may be broken in there causing it to hit that hard. I can’t remember if that one’s got a compression release on it or not. I don’t think it does though, so it sounds like we need to open it up and take a peek. Worst case, I’m sure it needs to have the valves adjusted …
Yamaha ATV Repair
I used Lucas extra heavy duty grease in my 2007 Grizzly 700 primary and secondary clutches. Is it good to go?
John Talley: I’m not that familiar with the Lucas brand. If it has roughly the same properties as the Ultramatic, you should be okay. If it’s a little too thick, your engagement may be a little bit lagging, but once it gets heated up in there, it should start flowing correctly. I just hope that it isn’t too viscous, I think that’s the correct word I’m looking for. Just take it out for a spin. Worst case, it gets too thin and it gets thrown out and gets on your belt, and then you have to buy a new belt, and there are worse things in life. Second scenario is that it’s too thick and it won’t let your sheaves go all the way out or go at the rate they should. Either way, is it going to do any serious damage? No, but if you can’t get the Ultramatic grease, then you just have to go with a close approximation.
I changed the rear brake pads on my YFZ450 and they’re not working. Could you give me some tips on what to do?
John Talley: Alright, you’re saying you changed them out and they’re just not engaging at all? That makes me wonder if, well, are you sure that you got them in there right? Or it may be time for a brake bleeding. When was the last time you bled out the brakes on that one? We have multiple videos showing you how to do brake bleeds. I’m sure we did one on a YFZ450.
Want to see more live repair questions answered? See all of Partzilla’s past Live Q&A sessions here.