Partzilla Live Q&A with John Talley – February 05, 2021

Another edition of Partzilla Live Q&A is in the books with John Talley answering your motorcycle and ATV repair questions. 

Honda ATV repair questions took over the conversation again this week, with the ever-popular TRX 400 model taking the spotlight once more. 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 with John Talley 02-05-21

Partzilla Live Q&A – Honda TRX 400 EX Repair Questions and Answers 

How bad is it to not have an air filter cage on a 400 EX?

John Talley: That wouldn’t be advisable because you’re basically dealing with an air compressor. That’s what your engine is, and it is pulling in air and expelling it, and without that cage around the inside of the air filter itself, it’s just going to collapse it and it’s going to pull through enough air. It’s just going to collapse all the way down and it’s going check off your motor, so I wouldn’t recommend that at all.

Do Honda TRX 400 EX models have loud top ends? I hear a slight ticking. What could that be?

John Talley: More than likely that’s just a valve out of adjustment. That ticking sound is usually the rocker arm with too much clearance on top of the valve itself, and it’s just letting it bounce too much, making a clicking sound. So adjust the valves. I’m pretty sure we did a video on how to do that for that particular make and model.

I have a 400 EX and when I go to turn it over, it sits and pops over and over and sounds like it wants to start but it won’t turn over. Any thoughts?

John Talley: What have you been doing to it? Because that sounds like the timing is off for some reason. I need a little more information because it sounds like it’s actually trying to pop back through the exhaust or ignite back through the intake. And if you haven’t done anything and it’s still popping like that, chances are your intake valves may be a little too tight and it’s trying to ignite with the valve not shut all the way because they’re not adjusting correctly. If you haven’t done any modifications to it as an engine build, then check your valve clearance at top dead center.

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


Why Partzilla?

Commercial Discounts

Special discounts for companies in the powersports industry


Government Sales

Discounts for federal and most state and municipal agencies