Cam Chain Tensioner Checks on a 900

[dandywarhol]

<!--quoteo(post=139656:date=Wed 28th Oct 2009, 12:30 AM:name=vicens66)-->QUOTE(vicens66 @ Wed 28th Oct 2009, 12:30 AM) <{POST_SNAPBACK}><!--quotec-->[img]style_emoticons/<#EMO_DIR#>/ohmy.gif[/img] Done the cam chain swap tonight and i had problem to find tdc,look like I find tdc before reaching the T mark. Done any way ,when i remove the old I hear a noise(probably the chain jumping).
Put the new one and if I could see the T mark on the other side [img]style_emoticons/<#EMO_DIR#>/unsure.gif[/img] gone it was i fuckup.
Turn the engine by hand; no noise no resistance .Fire the motor sound sweet no more horrible noise.
when for a ride and realise got a loss of power between 4000/5500 rpm.
Got 2 questions lads.

1: Did the cam chain jump?

2: When you take the generator cover off ,i find oil behind it(19 mm bolt was cover in oil) ?

Any response .thanks
[img]style_emoticons/<#EMO_DIR#>/excl.gif[/img] [img]style_emoticons/<#EMO_DIR#>/excl.gif[/img]<!--QuoteEnd--><!--QuoteEEnd-->

These engines will run with the timing out by 3 teeth without touching a piston.......................................symptoms are power loss!

The exhaust cam position can be determined by removing the cylinder identification sensor in the front of the head - there's a casting on the cam which lines up with this.
There's a post I put on here I put up some time ago of the method to find TDC on the left cylinder

http://www.carpe-tdm.net/ipb/index.php?sho...mp;hl=cam+chain

[vicens66]

<!--quoteo(post=139806:date=Thu 29th Oct 2009, 12:05 PM:name=dandywarhol)-->QUOTE(dandywarhol @ Thu 29th Oct 2009, 12:05 PM) <{POST_SNAPBACK}><!--quotec-->These engines will run with the timing out by 3 teeth without touching a piston.......................................symptoms are power loss!

The exhaust cam position can be determined by removing the cylinder identification sensor in the front of the head - there's a casting on the cam which lines up with this.
There's a post I put on here I put up some time ago of the method to find TDC on the left cylinder

http://www.carpe-tdm.net/ipb/index.php?sho...mp;hl=cam+chain<!--QuoteEnd--><!--QuoteEEnd-->

Shoud find that post early .I sure my timing was out already by (T MARK was not in line )1 teeh and i make worse when i remove the tensioner .

But what about the oil i find in the generator ,after looking at the pictures looklike its all dry inside the casting.

[danbara]

It is time for me to change tensioner on mine MkI. all -in-all the procedure should be the same.

it scared the crap out of me when the noise started so I stopped right away. i noticed power loss and noise so i checked valve clearance and the exhaust valves are to tight and the chain is slapy.

anything special that I need to know before I do this change since it is MKI? any guess is welcome!

[peve]

Hi all.

Did change my tensione about 500 km ago.

Much better sound in the motor, the horrible one is gone.
No powerloss at any rev, gain if anything.
BUT > there is always a but, i feel like the motor is harder now. There is a little shake that was not before and starts at about 2500. Could it be that it has slipped 1 tooth or is this normal after the change [img]style_emoticons/<#EMO_DIR#>/ohmy.gif[/img]


Pétur

[Guest]

I've gone pass 48k km and it still has old tensioner. No idea if it's making any chain noise cos I'm stone deaf!!! Nevertheless, I'm going to replace the tensioner anyway whether there's noise or not so I'd need to find place that sells spare parts. Trawling through the threads I've come across three sources:

Fowlers
Wemoto
Bizforbikes

None of above has parts listed online so I've fired email to each above for all inclusive price incl. p&p to Ireland for both tensioner & gasket items. Still waiting for response...

Is there any other places I can check/order? Might be a good idea to list the sources for others to look up and order from.

How much did any of you paid for it?

[Guest]

Phone yam UK and order one direct.
I'm currently on 131000kms (82000miles) and still on the original tensioner

[Guest]

<!--quoteo(post=165917:date=Sat 12th Jun 2010, 12:51 AM:name=celticbiker)-->QUOTE(celticbiker @ Sat 12th Jun 2010, 12:51 AM) <{POST_SNAPBACK}><!--quotec-->Phone yam UK and order one direct.
I'm currently on <b><!--coloro:#FF0000--><!--/coloro-->131000kms (82000miles) and still on the original tensioner<!--colorc-->
<!--/colorc--></b> [img]style_emoticons/<#EMO_DIR#>/yeahyeahyeah.gif[/img] [img]style_emoticons/<#EMO_DIR#>/yeahyeahyeah.gif[/img] [img]style_emoticons/<#EMO_DIR#>/yeahyeahyeah.gif[/img]<!--QuoteEnd--><!--QuoteEEnd-->

Thanks Celticbiker. You just reminded me there's Yamaha parts distributor, Danfay in Dublin - will ring them up. [img]style_emoticons/<#EMO_DIR#>/good.gif[/img] Mine might be ok but I'd feel alot better knowing my TDM has better tensioner/part, you know.

This post was last modified: 13-06-2010, 04:54 PM by cozzy.

[v2lek]

Sooo....

 

Got my bike back from shop today. '04 900.

Bike has done 70'000km, so the time was right..

 

Asked them to change camshaft chain tensioner and work on valve clearance.. Did not want to change it myself for obvious reasons and figured that if they are doing valves anyway then all will be okay.

 

However, got my bike (and it turns out valve clearance was spot on on all valves, so they did nothing) and it felt powerless.. acceleration that could be done before on third gear had to be made on second gear now. Also when bike really warmed up it somewhat stuttered on higher revs. And didnt seem to want to rev at all at times.

 

but at the shop they said that they know of the problem and checked it while changig tensioner no clunky sounds or whatever, and timing seemed correct. So I dont know what to think of it. Fortunately they were willing to take bike back for fixing, if they somehow managed to jump the chain.

 

Revving the bike on a sidestand, the engine did seem to be smoother than before, before lieaving the bike shop. So its really strange

 

After calling them from home to ride back the bike did not want to start right away, it actually needed some gassing before it agreed to fire up..

 

Sounds like jumped chain, right ?

 

Strange thing is, while going home, at one moment, when taking off from intersection, the engine made temporaryly howling, screeching sound while I was giving some revs and realeasing clutch. Dont know what to think of it. Does the new chaintensioner make any sounds while tensioning, adjusting ?

 

And even stranger thing is, while riding back to shop the bike seemed almost normal... apart the starting issue.

 

So.. any ideas?

Will update when I know more.

This post was last modified: 02-05-2013, 03:41 PM by v2lek.

[Studley Ramrod]

They shouldn't really need to be checking for clunky sounds if they were checking the valve clearances, they would have taken the valve cover off and would be able to see the timing marks on the camshaft sprockets.

Removing the valve cover is the ONLY way to check for certain that the timing hasn't slipped a tooth or two.

 

I guess the screeching could have been the clutch.  :unsure2:

[leehenty]

all valves were spot on at that mileage ?  :um:  My money is on valve timing being out, but how can they have missed it if they had the top off ? I think you might have a dodgy dealer there who skipped the valve check and slipped the chain.

Low power is a sure sign of valve timing being out.

[dablik]

That sounds a load of bollocks to me,,, lazy twat dealer,,,, well maybe eh !!!! and this is the very reason i suffered and toiled and bled and swore, lots,, oh no that was Studley, the swearing i mean.. :giveusahug:

 

v2lek i feel your frustration and i think you should be having some very choice words with your mechanic about the work he has done....or not as the case may be ??

good luck i hope you get it sorted,,,,let us know how you get on wont you.

[v2lek]

Hi,

 

Thank you for your input, will see what the mechanic says, when they have time to take it apart.

 

I would'nt yet suspect a dodgy dealer, they have quite good reputation around here, however I also do feel it strange that the valve clearance was still within specs. After doing that many kilometers.

 

He said that they are aware of TDM's problem with jumpy chain and so they took extra precautions and so on and even checked the timing and all seemed fine. And that the bike, with old tensioner did not rev at shop as smooth as with the new tensioner (this already suggests actually, that the timing has changed). Yes it was smooth. At first. But smoothness without power..

The only other option I can think of, if they take it apart and everything is okay, is that for some reason the bike has already jumped a teeth before or some other dealer put it back slihgtly misaligned (to fire bit early?) - alltough, in that case the bike should not have been more powerful than it was now. And it shouldnt have acted up now as it did. I'm at a loss here, sorry for so many words.

Will see when they have time to take it apart, Its high season for bike maintenance right now, so they do not exactly have alot of spare time... So maybe they rushed a bit the first time..

[v2lek]

So, got my bike back finally. They said that everything was okay and they fiddled with it to see when actually the chain can jump. after some testing (repeteatly removing and installing chain tensioner) they stated that it can only jump from top when cover is off, otherwise no jumping.

Well. if they say so.

 

However whatever they did, the bike came back alive. It now has power. And all is fine. So maybe they somehow in a hurry foobared something else up, vacuum lines, ignition.. No idea, but all is fine now and the actual problem will remain a mystery.

 

Thanks to everybody for giving it a thought, tho.

[dablik]

Good news.. well whatever the problem at least they have sorted the issue out for and put you back on the road  :good:

[dandywarhol]

So, got my bike back finally. They said that everything was okay and they fiddled with it to see when actually the chain can jump. after some testing (repeteatly removing and installing chain tensioner) they stated that it can only jump from top when cover is off, otherwise no jumping.

Well. if they say so.

 

However whatever they did, the bike came back alive. It now has power. And all is fine. So maybe they somehow in a hurry foobared something else up, vacuum lines, ignition.. No idea, but all is fine now and the actual problem will remain a mystery.

 

Thanks to everybody for giving it a thought, tho.

 

Good news - believe me the timing WILL jump with the cover in place so they're talking shit. Taking the tension off on the wrong firing stroke will make it jump. Pleased you're sorted  :good:

[leehenty]

doesn't sound like they are very good at the job, if they did the valves the top would be off to stick feelers in, don't they read the service manual ?

If no valves needed the shims doing, then why take out the tensioner anyway since they were not going to pull the cams ?

Glad to know you are back on the road, but watch them like a hawk next time they fiddle with your bike.

 

dandyW is right, the chain will skip if the engine is in the wrong position when they take off the tensioner, cover on or off makes no difference.

 

My gut says something not quite ticketyboo here.

[stevierst]

Has anyone used one of these instead of the automatic CCT?

[dablik]

Dunno bout that particular item stevie but, CB changed his to a manual with a cupla nuts me thinks on his 9r.

[James]

Has anyone used one of these instead of the automatic CCT?

Im reshimming the valve clearances on my 900 and, on the way, found mines still fitted with older type of cam chain tensioner. Mine wasnt noisy but after consulting JBXs site I thought it best to change it. I saw these manual tensioners on eBay or Amazon. In the end I decided not to risk it and just stumped up for an OEM new, improved CCT from Fowlers, along with a couple of gaskets. Its costing the thick end of £150 but Id rather be safe than sorry, Im not sure Id know what the correct tension would be, set manually.


Interested to hear the opinions of people who have fitted one though

[dapleb]

I have one on Dave (drz). There is a knack to adjusting them. A common durrz mod and plenty of adjusting info.


I would probably fit one to a 9er as the spiral adjuster system is poo. The rat sheet system on 850 I would leaf alone.