Manual Cam Chain Tensioner Installation Guide (MCCT's)

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VTRsquid
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by VTRsquid »

Thanks guys.

Cappy
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by Cappy »

Hi. Recently purchased a 99 firestorm, looking to replace the cam chain tentioners. I've gone over the guide, is it just me or does the play in the cam chain when at full tentioners seem really excessive (5-7mm). I recently did the cam chain in my wr450 and you almost can't move the chain at all up and down with the tentioner in.

Is this just the nature of this engine? It seems quite alarming lol

tony.mon
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by tony.mon »

You will only set 5-7mm of play on manual tensioners, no need to set automatic ones.
It's not falling off, it's an upgrade opportunity.

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VTRDark
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by VTRDark »

IIRC there's 5 mm play in the auto tensioners when in place and the extra 2 is a safety margin to allow for the heat expansion and non auto tensioning. Not much use trying to compare one engine to another as every engine has it's own specifications. This has been the specification for many years and numerous bikes have used this with no issues. Krieger recommend the same.
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cmg55
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by cmg55 »

Greetings,
I'm about to install Kriegers myself.
Did you pull both valve covers and the carbs or just the back valve cover??
I've read two different sets of directions and can't decide which to do...
Thanks,
Colin
UPDATE- After re-reading Carls directions and his replies to some of the chaps suggesting the quicker back cam cover method, I've decided the more thorough procedure as outlined by Carl is the proper way to go for me.
Thanking you in advance Carl! ( My CCTs just arrived today, so all my nervous anticipation will now be put to the test!) :shifty:

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0gri
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by 0gri »

Hi VTRDark,i followed your excellent guide to change my tensioners and it made it a complete doddle,especially loads of photos.Thankyou sir,your a fekkin diamond :thumbup:

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Fabiodriven
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by Fabiodriven »

I'm sure this is going to seem like a silly question, but I don't understand why the valve covers and carburetors have to come off in order to replace the tensioners. I'm not saying it's wrong, I'm sure I'm just not understanding. Why not just put each cylinder at TDC on the compression stroke when changing out each tensioner? Why does the rest of the engine have to come apart?

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Wicky
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by Wicky »

They don't - unless you want to access the front pot to measure to measure directly the cam chain tension when setting the MCCT. The more thorough way came about from folk who were uncertain of what finger tight / backing out 1/4 –1/8 turn and wanted something more objective - hence the need to remove carbs and front cam cover rather than just removing the rear cam cover and turning crank round a set amount to get the timing right for the front.

This is the method I've used: https://cl.ly/7826d63c5505/download/Fir ... change.pdf
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E.Marquez
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by E.Marquez »

Fabiodriven wrote:
Sat Jan 11, 2020 8:17 pm
I'm sure this is going to seem like a silly question, but I don't understand why the valve covers and carburetors have to come off in order to replace the tensioners. I'm not saying it's wrong, I'm sure I'm just not understanding. Why not just put each cylinder at TDC on the compression stroke when changing out each tensioner? Why does the rest of the engine have to come apart?
Its a good question...

Many have tried the short cuts, and many of those paid the price with anything from bent valves to just extra work in re timing the cams, re adjusting the overly tight / loose MCCT.

The install process suggested (which is hardly taking apart the "rest of the engine") is a sure way to get them installed with no mistakes.
With the cam covers off you can zip tie the chains to the sprockets, you can visually see the cam chain slack/ tension, you can know if the cam chain jumped a few teeth when the valve springs on the other cylinder were able to push the cam lobes and rotate the crank and cams
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AMCQ46
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Re: Manual Cam Chain Tensioner Installation Guide (MCCT's)

Post by AMCQ46 »

There are ways to do the front one without taking the cam cover and carbs off, but you will always need to take the rear one off to establish that you are on the compression tdc.

It should be documented in this thread somewhere.

But if you have the tank and airbox off already it Is a good opportunity to check the valve clearances
AMcQ

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