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  #1  
Old 3rd December 2018, 11:05 PM
stephenryan2525 stephenryan2525 is offline
Wobbling Fledgling
 
Biker.ie Member No. 38364
7 posts since Jun 2018
Default Engine rattle after valve job

Did my valves 2 days ago (first time) on a bandit 6 and been perfect until today where after I gave it a bit of a beating I now hear a rattle at idle. I've been told it's probably the cam chain/tensioner which got me thinking. We're supposed to rotate the crank clockwise when doing valves but I rotated them by the wheel anti-clockwise a little bit.
It's too coincidental that only now it's happening but it was running amazing for two days
So is my timing shagged?
Is it doing damage by riding until the weekend?
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  #2  
Old 3rd December 2018, 11:17 PM
sharpbikes's Avatar
sharpbikes sharpbikes is offline
bike broke
 
Biker.ie Member No. 30720 from Offaly
2,149 posts since Jan 2013
Motorbike: R1, zx7/9r, Uni-cycle
Modifications: inflatable doll underseat
Default Re: Engine rattle after valve job

valves on them are meant to be ticky and sound like a type writer when set correctly, i assume thats not the noise, tensioner failure will cause a distinct slap at idle from the chains at slack and hitting the tensioner blade or the cam chain tunnel, when doing clearances on a b6 you dont need to remove the cams so i would be almost certain you didnt upset the timing.

turning anticlockwise isnt recommended when turning the motor over but ive yet to see it cause damage. i would assume its purely down to the fact the tensioner has failed at a coincidental time.

i have had bikes that have had tensioners ready to tick over onto the next notch on the tensioner before and rattled a bit but usually a good spirited ride gets the tensioner to click onto the next notch.
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  #3  
Old 3rd December 2018, 11:23 PM
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nednedned nednedned is offline
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Biker.ie Member No. 5106 from Dubzland
2,330 posts since Apr 2007
Motorbike: BANDIT 600 x2
Modifications: Air hornes-move cager
Default Re: Engine rattle after valve job

If you get a long screw driver. And put the handle to your ear and put other end on the engine at different points it will help to narrow down where the noise is coming from. I used to get abit of cam chain rattle until it warmed up. If it's tappets you did tighten valve lock nuts properly.
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  #4  
Old 4th December 2018, 03:08 PM
DavyH DavyH is offline
MotoGP Legend
 
Biker.ie Member No. 34191
2,349 posts since Dec 2014
Motorbike: Cb,Vtr,Xrv,Nt
Modifications: A few bits and pieces!
Default Re: Engine rattle after valve job

Pull the valve cover off and check you haven't a rouge locknut hanging about in there
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  #5  
Old 4th December 2018, 04:57 PM
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the landshark the landshark is offline
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Biker.ie Member No. 7493 from Mallow
5,927 posts since Dec 2007
Motorbike: TLR,Z900,CB200,CD200,Pan
Modifications: They sometimes work
Default Re: Engine rattle after valve job

Pull the clutch, if the noise goes away you need to balance the carbs.
Other than that use the long screwdriver method(or a mechanics stethoscope) to see what's rattling.
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  #6  
Old 4th December 2018, 05:36 PM
stephenryan2525 stephenryan2525 is offline
Wobbling Fledgling
Original Poster of This Thread Topic Starter
 
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7 posts since Jun 2018
Default Re: Engine rattle after valve job

Hey guys! I gave it a very 'enthusiastic' throttling earlier hehe (see what I did there) and it didnt seem help. I've yet to get a screwdriver to it or open the blasted thing again but today I noticed it's never there when cold and it only starts after I do some relatively hard pulls.

Not sure whether to worry more or less about it now
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  #7  
Old 4th December 2018, 05:39 PM
stephenryan2525 stephenryan2525 is offline
Wobbling Fledgling
Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 38364
7 posts since Jun 2018
Default Re: Engine rattle after valve job

iirc it still rattles with the clutch pulled. The reason I did the valves to begin with is because I was advised to do that first before i balance the carbs
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  #8  
Old 4th December 2018, 06:12 PM
joe williams joe williams is offline
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Biker.ie Member No. 23271 from tipperary
794 posts since Aug 2010
Motorbike: zx6r.cr 500sm. ktm950 sm.
Modifications: black duct tape
Default Re: Engine rattle after valve job

Did ya change oil aswell ??
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  #9  
Old 4th December 2018, 09:07 PM
stephenryan2525 stephenryan2525 is offline
Wobbling Fledgling
Original Poster of This Thread Topic Starter
 
Biker.ie Member No. 38364
7 posts since Jun 2018
Default Re: Engine rattle after valve job

Originally Posted by joe williams
Did ya change oil aswell ??
No I didn't this time. The oil is only 1 month old
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  #10  
Old 5th December 2018, 12:38 AM
joe williams joe williams is offline
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Biker.ie Member No. 23271 from tipperary
794 posts since Aug 2010
Motorbike: zx6r.cr 500sm. ktm950 sm.
Modifications: black duct tape
Default Re: Engine rattle after valve job

Originally Posted by stephenryan2525
No I didn't this time. The oil is only 1 month old
Check clearances again
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