Are water cooled and air cooled drive shafts same?

[richie-b]

Reason for asking, is that I have a water-cooled box on a cu engine which works well. Keep getting knocking on cornering, but new cv joints. Grabbing shafts and moving side to side they knock against the wheel end which I presume will be the hub.
Up down movement is negligible.

[bigherb]

Aircooled are longer. Worn wheel bearings also cause knocking.

[richie-b]

Thanks bigherb. Looks like I will have to look out for some secondhand w/c shafts then. Defo not wheel bearings, one of the first things I checked.

[bigherb]

It is the engine that makes the difference. Aircooled are engines are longer so the gearbox is mounted further forward which requires longer drive shafts.