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Noisy chain
Posted: Tue Jun 04, 2013 10:49 pm
by djh66
My LIS engine runs sweet as a nut, but I have a noisy chain, which I don't notice on other Lammies, I rebuilt the engine a year ago and am using a standard tensioner, anyone know how to resolve this?
Re: Noisy chain
Posted: Wed Jun 05, 2013 12:19 am
by rosscla
Did you check the sprocket height / alignment tolerances when you rebuilt it?
If they're out this could cause it.
Re: Noisy chain
Posted: Tue Jul 09, 2013 11:31 am
by djh66
Now, not only do I have a noisy chain, but I noticed another strange noise, when sitting at the lights the other day! It didn't dissapear, when I pulled the clutch or put in gear, so I decided to open it up and have a look
My chain, may have been a bit too tight, I was using standard tensioners, I have just ordered some race tensioners from Beedspeed, hoping this will help mute the chain noise, when adjusted correctly.
As for the other noise.......... I 've looked at the clutch - all ok. gearbox endplate - ok, gears - ok, a bit stumped where to look now????
Re: Noisy chain
Posted: Tue Jul 09, 2013 1:10 pm
by RICSPEED
is it possible chain may be catching on a end plate stud
Re: Noisy chain
Posted: Tue Jul 09, 2013 2:38 pm
by djh66
RICSPEED wrote:is it possible chain may be catching on a end plate stud
Checked that, no sign of catching or wear.
Re: Noisy chain
Posted: Tue Jul 09, 2013 5:06 pm
by fairspares
check the front cog bolt hasnt come loose. Remember they are chain guides not tenioners.
Re: Noisy chain
Posted: Tue Jul 09, 2013 5:19 pm
by djh66
fairspares wrote:check the front cog bolt hasnt come loose. Remember they are chain guides not tenioners.
Will do! How much slack should I leave on the chain?
Re: Noisy chain
Posted: Tue Jul 09, 2013 5:51 pm
by fairspares
turn the rear sprocket to take up any slack in lower chain , then adjust top guide so there is around 6 - 10mm up/down play in the chain "between the guide and front cog". front cog should be tightened to 24 ft lbs .
Re: Noisy chain
Posted: Tue Jul 09, 2013 6:20 pm
by djh66
fairspares wrote:turn the rear sprocket to take up any slack in lower chain , then adjust top guide so there is around 6 - 10mm up/down play in the chain "between the guide and front cog". front cog should be tightened to 24 ft lbs .
Thanks
Re: Noisy chain
Posted: Wed Jul 10, 2013 9:57 pm
by djh66
OK, examined the chain, all ok, examined the clutch, seemed ok, checked gear box endplate all seemed in order. Rebuilt it using Teflon type chain guides and adjusted to about 6 - 10mm play, started her up and still have a whirring noise, however I does disappear when I put it in gear, so what have I missed