Partzilla Live Q&A with John Talley – August 20, 2021

John Talley brings you another edition of Partzilla Live Q&A, answering your real-time motorcycle and ATV repair questions.

Engine oil questions and answers were the popular subject of this week’s 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 08-20-21

Partzilla Live Q&A Highlights – Engine Oil Questions and Answers

I recently rolled my Yamaha Grizzly. Oil came out of the airbox, which I've already cleaned out. Besides adding more oil, do you have recommendations as to what else I should check engine wise?

John Talley: Once you get it rolled back over and let everything settle back down and you’ve already cleaned out your airbox, it may pull some residual oil that you couldn’t get to, maybe into the intake and it’s just going to burn that up. But other than that you shouldn’t have to do anything to it, except be more careful. Try to keep these things on four wheels or two. 

I have an 06' Suzuki C90 with 47K miles, fuel level goes up and down during ride. Is it time to replace fuel pump or just sensor? Any experience using Marvel Mystery oil and fuel to clean the engine?

John Talley: I’m not a huge fan of the Marvel Mystery oil. I have used a couple of different products from Yamalube as far as combustion chamber cleaner and another product they call Ring Free. I can recommend those without hesitation … but Marvel Mystery oil I’ve never been a big proponent of that. I’m sure there are hundreds, if not thousands of people that use it with great success, it’s just never worked as advertised for me. Maybe I’m in the minority and I’m wrong, but you asked my personal opinion and there it is. 

What oil do you recommend for an 05 Honda Rancher oil change?

John Talley: I like the 10W-30 semi-synthetic HP oil from Honda. That’s the one I go to. It’s the one in the gold bottle, if memory serves. Do not use the one in the silver bottle, because it has moly in it and that will make the clutch slip, so don’t use that one. 

I have a Honda 400 EX rebuilt and upgraded to a 440 big bore. It starts and runs amazing, but after it gets a few good minutes of hard riding, it develops a pretty loud ticking from the top end. Any thoughts?

John Talley: Alright, are you sure about the valve clearance on it? … Let’s think about this in two different ways. One, make sure your clearances are toward the tight side, especially on the exhaust. Second, what SAE value oil are you running in it? You may want to bring it up a tick, say if you’re doing 10W-30, then maybe go up to a 10W-40 to give it something a little bit thicker on the top end, to see if that quiets it down. Look at those two things first. … I’m thinking your oil is thinning out a bit too much, so take a peek at that and reconsider which oil you’re using.

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

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