User manuals free to download
 

I stumbled across this russian site using a google 'index of' command to find a manual for a Honda XR 600. Most of the links seem to be ok, if the left column link is broken try the one in the middle column.

Update:
Index of /Manuals_pdf
Free PDF motorcycle manuals for download!
http://ursa.irk.ru/manual/
RepairManualClub.com


4WD manuals here

also a tip for finding your manual is to enter the following in google search:

--> intitle:"index of" honda XR600 manual

obviously replace honda and XR600 with your model of choice. This search works for lots of other files too (including mp3s).

More of them
 

and here's a link to a whole load more.

Free PDF motorcycle manuals for download!

Useful indeed, thanks very much Alex.

Is it worthwhile sticky-ing this?

Here is a similar site for 4 wheeled vehicles

Интернет-магазин автозапчастей DETALI.RU - запчасти для любых иномарок.

The above link works but should read

www.detail.ru

....................it's all in the translation:)

And yet another site...
 

some more, this site has heaps:

Index of /Manuals_pdf