camchain tensioner

[bigmockuk]

just to finish putting things back together tomorrow and give it a try now that tensioner is in place,Cheers guys for your help and assistance!

[Murf]

Good photos thanks, hope it all goes well and everything is quiet when you run it up.

[bigmockuk]

Cheers Murf appreciate it,i`ll check in later todady 

[bigmockuk]

Hi Guys looks like its back to the drawing board  :'( started the bike up and tapping noise is still there even tho tensioner is in pace,gave it a few revs and noise didnt sound too bad so went for a run but 5 mins later the noise became a concern,loud tapping sound which rises with the revs and you would put your last buck on it being overly loose tappet,but is definately coming from the top end left hand side,right hand side has no sound at all its running quite,this sound is from the top left so thinking its either damaged valve springs on no1 cylinder or damaged rocker arm shafts,ive already had no2 valves out to check them and lapped the valves in too
,now wish i had did no1 also.i`ll take rocker cover off tomorrow and take shafts out to inspect things,if all looks good its head off time again to check no1 valves,strangely enough when i first got the bike i had to replace no1 valve and guide as there was a whole lot of side play in the inlet valve but all the rest were sound,weird,what could possibly have worn the valve away to such extent it wore away the guide! any ideas im all ears lol

[Bryanj]

Got to ask, are you sure the exhaust gasket isnt leaking, many have chased noisey tappets only to find nipping up the flange cures it

[bigmockuk]

ye Bryanj just fitted new ones the other day too,just seen on DS that the tensioner is supposed to have a rubber dampener fitted at the end,mine doesnt so could it even be that resonating upwards

[Bryanj]

Supposed to have one each end in the steel bit, usualy dont fall out

[bigmockuk]

so Bryanj you think maybe whenever the tensioner is removed the rubber may stay put? i`ll upload a small video to youtube at some point later today of a recording i took of the noise and post a link here if anyone can determine what it could be,this has only occured recently,the engine has been sound up to now so im asking myself was it something i disturbed? in which case its only been the tensioner .i hope to take the rocker cover off later and remove the shafts to check things are ok there and if not i`ll go further down to possibly fit new dampener rubber,im too stubborn to let this get the better of me but its chipping away at me haha.back to work shortly too then time will be against me.

[Laverda Dave]

If the damper rubber is missing you need to replace it (them) otherwise the tensioner blade will be moving around and will have insufficient tension being applied to it.

[Seabeowner]

As said they don't come out until you remove the blade and I think they are hidden in the pockets at the ends of the blade.

[bigmockuk]

was so sure i`d find somethingoutof place upthe top end like a damaged rocker shaft or valve spring but found nothing,so this noise must be resonating upwards from down below and the only thing i can think of is the tensioner rubber at the bottom,as the camchain is moving round the tight spot that a chain has must be pushing the tensioner against the groove it located in and resulting in the tapping sound so thats the next job,hopefully get that done before the weather changes in the next few days 

[exvalvesetdabbler]

I have been following your thread with interest.  It occured to me earlier today and I remembered watching a video some time ago where a 400 four rebuild was giving similar noises.

In that instance the guy had used a reground cam and the old followers.  Because of the mismatch in wear the rocket arm was slapping sideways on first contact and sounding like a loose tappet. I think a slowed down video confirmed it.

I guess the same could happen if the rockers end up in a different position after a rebuild.

It's on you tube somewhere.

Edit. Found it about 14 minutes in
https://youtu.be/k3qBLW_sYD8?si=LLzgM481N7aTsw_j


Regards
Dave

[Sesman]

That was superbike surgery. Twas a 400 four.

[Murf]

Just a thought, it’s not the primary chain that is worn and slapping is it, you can see cut marks on the oil gallery cast in the crankcase if the chain is slack. (Sump plate off looking up)
Is the pad on the tensioner in good condition.
Is the cam chain guide in position and ok.

Do you slacken off all the tappet adjusters and back the screws out before fitting the rocker box back to the head, then reset them all.

[Bryanj]

550 primary does not hit casing as much as 500