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Discussion Starter #1 (Edited)
hi i have a 1986 Honda Fourtrax 350 there is a ticking sound coming from the engine when i run the bike. I have looked on the internet and people have had the same problem and said it was the cam chain and tentionser. They replaced the tantionser and cam chain. How do i get to the cam chain?
 

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Welcome to the forums. If you have a ticking sound coming from the top of your engine, try adjusting the valves first. If that doesn't fix it, then look at the timing chain.

The cam cover or head/valve cover, as I call it, is on the main top of the engine.
 

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Discussion Starter #3
Welcome to the forums. If you have a ticking sound coming from the top of your engine, try adjusting the valves first. If that doesn't fix it, then look at the timing chain.

The cam cover or head/valve cover, as I call it, is on the main top of the engine.
I think the ticking is coming from the top of the engine. How do i adjust the valves, do i need to take the top end off to do so. My first four stroke atv, i rebuilt a 2 stroke.
 

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Welcome to the forums. If you have a ticking sound coming from the top of your engine, try adjusting the valves first. If that doesn't fix it, then look at the timing chain.

The cam cover or head/valve cover, as I call it, is on the main top of the engine.
I think the ticking is coming from the top of the engine. How do i adjust the valves, do i need to take the top end off to do so. My first four stroke atv, i rebuilt a 2 stroke.
I posted the procedure from the service manual, below. To adjust the valve clearance, you need to have the piston on TDC on the compression stroke. To make sure you're on the compression stroke, when you line the "T" mark up, try to wiggle the rocker arms. They should have a little play in them. If they don't, turn the flywheel one full turn to you come back around to the "T" mark again. Now, check to see if you can wiggle the rocker arms. When you are able to wiggle the rocker arms with the "T" mark lined up, you will be on TDC on the compression stroke. If you can't wiggle the rocker arms when the "T" is lined up, you're on the exhaust stroke. You can't adjust the valves on the exhaust stroke. I thought I would add this because the procedures from the service manual aren't clear about that. Also, make sure the engine is cold when you adjust the valve clearance.


 

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Mine is doing the same, I adjusted the valves but it will still tick until I drive the ATV a bit. It goes away instantly when I back off the timing chain tensioner while the ATV is running. I bought a timing chain but it doesn't make sense because removing the tensioner that timing chain is very tight at TDC? I wonder if there was a link removed from it to save time and the tensioner is rattling against it?
 

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Sounds like a worn chain. I wouldn’t remove a link because then the cam sprockets will wear even faster.
There is an inspection item, in the manual, for the chain and tensioner. Have you got the manual?

It would be best for you to start a fresh thread on your quad; you’ll get more responses.
 

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Sounds like a worn chain. I wouldn’t remove a link because then the cam sprockets will wear even faster.
There is an inspection item, in the manual, for the chain and tensioner. Have you got the manual?

It would be best for you to start a fresh thread on your quad; you’ll get more responses.
I do, have a specific page?
 

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Sounds like a worn chain. I wouldn’t remove a link because then the cam sprockets will wear even faster.
There is an inspection item, in the manual, for the chain and tensioner. Have you got the manual?

It would be best for you to start a fresh thread on your quad; you’ll get more responses.
I do, have a specific page?
start your own thread in the repair section :).
 

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Sounds like a worn chain. I wouldn’t remove a link because then the cam sprockets will wear even faster.
There is an inspection item, in the manual, for the chain and tensioner. Have you got the manual?

It would be best for you to start a fresh thread on your quad; you’ll get more responses.
I do, have a specific page?
Actually chapter 7 but it’s not clear to me how to check the free play on the chain guide or tensioner. I definitely read it somewhere. Let’s start a fresh thread cuz the other members can add what they know and point to a can chain stickie or new thread
 
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