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Hello everyone, picked up a 1986 fourtrax 350 the other day and its making a ticking noise from the motor. I have done research and found its probably either the cam chain being over stretched or the valve adjust being off. comparing my sounds to other videos on the internet mine doesnt seem as loud? more of a deeper sounding noise. I downloaded the FSM and a manual from amazon and have been reading up on the cam chain job which doesnt seem to bad to get done. I did remove the chain tensioner and checked how far it sat out and it went pretty far before it hit the chain guide which could point to the chain stretch. Just looking for a few other opinions before i go and tear this thing down. Thanks!

around 35 secconds you can hear it loudest. this is with the motor mostly warmed up.
 

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bad cam chain, or loose valves.
 

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You think so? It sounds like the very beginning of it going bad since the noise isn't consistent. I already have all the parts on order just need to wait 3 weeks for the gaskets :(
 

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if the cam chain slack adjuster almost hits the cylinder as you feel it touch the cam chain guide ?, then yes, cam chain is stretched. its an '86, prob never have been changed ?. will be a good time to check/adjust the valves while your doing the cam chain.
 

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Yes that is what I found. A little reassuring to have someone agree lol. I'll have my fingers crossed after the job that the noise has gone away! Thanks for your input!
 

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Yes that is what I found. A little reassuring to have someone agree lol. I'll have my fingers crossed after the job that the noise has gone away! Thanks for your input!
np, yw, if ya get stumped ?, have a hard time adjusting the valves ?, holler back on this thread ?, or find me here ---> www.atvhonda.com , its where i hang most of the time now. most of us old timers moved there from here.
 
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