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Author Topic: Cam chain tensioners?  (Read 1134 times)

Sid

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Cam chain tensioners?
« on: May 14, 2018, 08:18:12 PM »

Hi chaps,

So, I had a short ride last night and noticed a rattle. It's more pronounced when giving power and reduces a lot when you ease off. Had a listen when I got home and I'm fairly certain it's cam chain rattle. Bike is 2011 and only covered 4000 miles!!.
Are these tensioners just shite?, or could they have seized up through lack of use?
Previous owner stored this for nearly 5 months without starting it. I bought it in Jan this year, but as the weather was shite, all I did was start it once a month, let it idle for 10 mins just to keep the battery charged and oil around the engine.
Only took it out for the first time last week and have only done a couple of pretty short journeys (5 miles each way).

Can you dismantle the cct's and give them a clean, or are they likely to be fecked?
Also, can I take these out without fear of the chain jumping / slipping a tooth?

Thanks in advance guys.
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2011 GV650

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spit051261

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Re: Cam chain tensioners?
« Reply #1 on: May 15, 2018, 12:47:43 AM »

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2010  GT650R in the best colour RED

Sid

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Re: Cam chain tensioners?
« Reply #2 on: May 15, 2018, 08:17:18 AM »

Thanks Spit, but already looked through that.
It doesn't answer any of the questions I asked and a lot of it refers to 125 / 250's and bikes that are earlier than mine.
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2011 GV650

Sid

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Re: Cam chain tensioners?
« Reply #3 on: May 15, 2018, 07:34:21 PM »

Never mind,

I'll sort it myself....
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2011 GV650

spit051261

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Re: Cam chain tensioners?
« Reply #4 on: May 15, 2018, 11:06:25 PM »

Never mind,

I'll sort it myself....
I do try  :)
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Sid

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Re: Cam chain tensioners?
« Reply #5 on: May 15, 2018, 11:12:44 PM »

Never mind,

I'll sort it myself....
I do try  :)

I know you do buddy....... ;)
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2011 GV650

LX_SS

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Re: Cam chain tensioners?
« Reply #6 on: May 15, 2018, 11:23:09 PM »

Depending on the type of tensioner, some are rebuild able some arn't.
These usually require replacing the springs and key on them.

That being said most people tend to go for a manual tensioner version, since when they are set correctly, the manual tensions can't fail to the point of no spring tension and smash a valve into a piston. The chain will simple stretch a little bit over time and just needs readjusting on the tensioner.

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Sid

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Re: Cam chain tensioners?
« Reply #7 on: May 16, 2018, 05:37:29 PM »

Thanks LX,

Think I'll stick to the auto ones though.
My main concern is whether I need to go through the extra palava of setting the engine to tdc compression before removing them. Trouble is, the marks where the stator cover is, simply means tdc, so could be tdc comp or exhaust. Only way to tell for sure is to remove the cam covers as well, which is a lot of extra work (and I'm lazy... ;))

I could try to reset them by removing the nut, then turning the screw clockwise to retract the plunger, let go and allow it to spring back in, but there is still the risk (??) of the loaded cams moving as it's not tdc compression.

Not sure what to do tbh.
Has anyone on here replaced the tensioners on their 650's??
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LX_SS

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Re: Cam chain tensioners?
« Reply #8 on: May 17, 2018, 09:18:15 AM »

You could just remove the cam cover enough to see the lobes, don't have to lift it entirely off.

But only way to tell which way it is.
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Sid

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Re: Cam chain tensioners?
« Reply #9 on: May 17, 2018, 06:18:15 PM »

...actually, if turning over by hand, if as I'm approaching the mark there is not much resistance I could assume it's tdc exhaust, if a lot of resistance (compression) then I could assume I'm tdc compression?

What do you think?
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