Noise V upgraded timing chain adjuster

1970 S 750 with steel adjuster. Has anyone changed to a auto adjuster or a later model adjuster with a rubber insert and if so is there any noticible reduction in noise level, I seem to have more than what i would consider normal noise coming from that area, ( altho i dont really know what normal would be as i have nothing to compare with, Bike runs fine but seems tappety (if thats a word) and ratterly( i know thats not a word) in the timing cover area.

Thanks
Rob

"Tappety" sounds like your valve adjustment is a bit loose and "raterly" sounds like the timing chain is too loose?

At any rate, the all-steel timing chain adjuster on my old '69 S was not any noiser than the rubber faced adjuster on my '75 Commando.

Jason,
I use an all steel adjuster on my Mk3, I don't like 'rubber' adjuster faces cos as they wear the 'rubber' comes in contact with the chain rollers and spins them up pretty fast, not good for the chain.

I reckon it's quieter with the steel slipper.

Cash

I have the automatic adjuster now. Definitely less if the whirring, hissing sound associated with the chain. Also don't have to worry about getting it to the correct tension at the tight-spot and having it oscillate because the gears are ever-so-slightly eccentric.

Thanks for the comments, seems its a 50/50 call. I will readjust tappets and may order a adjuster to have on hand for a rainy day with nothing better to do than pull the bike apart. I have noticed the whirring sound as well. Maybe its just a matter of accepting all the noises as part of an old engine but i would have thought with everything sorted properly there would be little mechanical noise apart from the exhausts Cheers
Rob

ludwig

often a moving sprocket

Click to expand...

Precisely, generally a sprocket for the rollers and high load, a slipper for the plates and light load.

When rollers run on a slipper they can revolve at revs way above their design intent causing premature wear, not good. However, the Norton timing chain and others probably run at speeds slow enough for it not to matter. I just try to avoid it if I can, that's the way I am.
Have a look in Engineering bibles such as 'Kemps' they'll explain it far better than I.

Cash