[elfelectric]

Ok, my speedo went out last year and I also would hear clunking sounds. Figured out it was the drive shaft bearings so I replaced both.
This year it started making the clunking sound again. I can feel it in my Left boot. The bearing there is fine. I checked.
Could it be the speedo gear/converter on the end of the shaft?

 

[elfelectric]

This is on a 1998 ZL500

 

[RJ Gleason]

Have you looked at the belt?

 

[elfelectric]

The track is not loose or to tight.
The drive belt seems fine. I don't really think it could make a clunk like that but what do I know...
Thanks

 

[RJ Gleason]

Take if off an check it. If you burnt it at any time, you would feel a spot like this )(. This would make a thumping noise.

 

[elfelectric]

sure, I'll check that out. I can think of a few times I might have burnt it...thanks