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Jon-D

ticking noise

10 posts in this topic

since I purchased my 93 XR (about three rides ago) I have heard a ticking noise coming from the cam chain side of the motor. I thought this was normal noise until I heard another XR running which did not have any noise originating from the motor. could the valve clearances be off? possibly a sign of a bad valves? any other ideas??

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it eather needs valve ajustment or a nuther reason it might do that is it might have an aftermarket cam. aftermarket cams are louder than stock.

my 400ex was ticking realy bad then i ajusted the valves and it went away

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also it may be something else. are raptor was ticking. i thought it was the cam. then 2 weeks after the tranny locked and the case got a chunk nocked out and the gears got eaten and it even spit part of a gear out the motor.

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Check your valve clearances, thats always a possibility, and could be most likely.

Also, if you take your valve cover off, try to pull the cam chain off the top sprocket, and your able to pull it off at ALL, then the chain needs to be replaced. This can cause a ticking too.

Also what could be a possibility could be the auto decompressor, although its unlikley because the 600's had an external type decomp, where the 650r's had an internal on the cam. You can always disconnect it too; like the cable at the valve cover.

If you get the valve cover off, check your rockers and cam lobes for any signs of wear and/or discoloration as well. If they get hot enough, they can come out of adjustment, and make some different sounds.

And lastly, the larger Honda thumpers are known for a little excess valve/head noise. Sometimes this can be taken care of by valve adjustments, and sometimes it just happens, and theres nothing you can do about it. For some reason, it seems the Honda XR's make a little more valve noise then the other thumpers.

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Also, if you take your valve cover off, try to pull the cam chain off the top sprocket, and your able to pull it off at ALL, then the chain needs to be replaced. This can cause a ticking too.

If it pulls off at all, it's usually the cam chain tensioner. If you replace it, get a new chain as well. The tensioners don't last too long.

I agree with the valve adjustment. Take a look. If one is way loose it wil tick. Pay special attension to the right side exhaust valve. If the auto-decompressor is engaged when checking clearance, it will be way loose during normal running.

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thanks guys, it turned out to be a miss adjusted valve (too loose).

how often do you have to check the cam chain adjuster? will you know when it is starting to go before it needs replacement? after reading about it, I am a little concerned because the guy who owned the bike before me did not seem like he was into maintenance so it probably was never replaced.

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Check your valve clearances. It's very easy to do. And ALWAYS make sure your oil level is where it should be.

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If it pulls off at all, it's usually the cam chain tensioner. If you replace it, get a new chain as well. The tensioners don't last too long.

I agree with the valve adjustment. Take a look. If one is way loose it wil tick. Pay special attension to the right side exhaust valve. If the auto-decompressor is engaged when checking clearance, it will be way loose during normal running.

I was under the impression that the cam chain tensioners usually lasted quite some time. When I did the the rebuild on my 650r, the cam chain was shot, and the tensioner was still good, but I was still able to pull the chain off the top sprocket slightly when the tensioner was on.

I went through the test in the Honda manual for the tensioner, and I was abel to determine that the tensioner was not shot. But I'm guessing that the tensioner on the 600r's and 650l's are different from the 650r's.

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I had a the same problem with my 1997 xr600,i took the rocker cover off and found that the decompreser came lobe and rocker had worn,

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It is most probably loose rocker arms or a worn out cam chain. If it is the chain, you will hear a slapping/tapping sound varying in intensity coming from the right side of the engine while you rev the engine up and down. By the way, I'm mystified by the reports of cam chain tensioners going bad. I have replaced quite a few cam chains and have never seen a bad tensioner.

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