Noisy chain
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djh66
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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?
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rosscla
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Did you check the sprocket height / alignment tolerances when you rebuilt it?
If they're out this could cause it.
If they're out this could cause it.
"Our dilemma is that we hate change and love it at the same time; what we really want is for things to remain the same but get better."
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djh66
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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????
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????
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is it possible chain may be catching on a end plate stud
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fairspares
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check the front cog bolt hasnt come loose. Remember they are chain guides not tenioners.
Fairspares Lambretta workshop.
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djh66
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Will do! How much slack should I leave on the chain?fairspares wrote:check the front cog bolt hasnt come loose. Remember they are chain guides not tenioners.
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fairspares
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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 .
Fairspares Lambretta workshop.
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djh66
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Thanksfairspares 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 .
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djh66
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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
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