Never had an issue with what exactly??? That they were damaging their chain and didn't even know it???
WD40 is a electrical moisture displacer first and foremost and and aniti-corrision agent and penetrator second.
Sure,it can clean crap off of your chain and it can/will DAMAGE YOUR CHAIN IN THE PROCESS!!
So,to sum up,buy a PROPER chain cleaner,thats what they're made for........
Lets hope we all understand that now eh......... :-?

Right,just to show that I'm not trying to force MY opinion down all of your throats (really I hear you all say??) I have found this article which if you're interested you can read and then make up your OWN mind.......http://www.webbikeworld.com/r3/motor...chain-cleaner/

Enjoy!

Thread now locked. GB.