Clattering sound.

[Tiny Tim]

Having neglected the 550 for a while and experiencing a points issue, I fitted a electronic ignition.
That seemed to have improved the bikes performance overall.

But, there is always a but. When I started the bike to take it out for a run today there is a rather nasty clattering/knocking sound coming from the back of the engine between the clutch and gearbox.

The clattering is not as noticeable when I increase the revs, it is still there none the less.

The electronic ignition has been checked an double checked.

When I pull the clutch in it's still there, when the bike has run for 5mins it's still there.

I'm at a loss really and would appreciate any advice.

Cheers
Tim

[Bryanj]

How about with clutch in, in gear and revs at about 2,00

[Tiny Tim]

Not a great deal of difference.

[Bryanj]

Difficult to diagnose without listeneing but if it wasn't there before thr bike was layed up the only thing i can think of is possibly rust in a bearing

[Tiny Tim]

I'll try a record a video of the bike running later today.
Thanks for the help.

[Tiny Tim]

Tried and failed to get a decent video recording of the clattering sound.
I've had a mechanic listen to it and he has recommended opening it up.
Now I have 2 projects

[Tiny Tim]

It sounds very much as you've described Oddjob.
Hopefully get a better idea next weekend.
Thanks for your help and advice.

[Ashdowner]

Tiny Tim if you do solve this then let us know what you did because many of us have the same problem

[Tiny Tim]

No progress as yet on the 550. The 350 is taking up my spare time at the moment.