This is a method of recovering worn rocker arm tappet surfaces with a more durable tool steel repadding electrode.  
Cost savings can be $100 per rocker arm set as Suzuki has a very high opinion of what a new set should cost you ....

Rather than copy the entire thing over and waste bandwidth, just follow the link to the Rubber Side down discussion.

http://suzukisavage.com/cgi-bin/YaBB.pl?num=1268653293