R/R stands for regulator/rectifier (rectifies the AC generated by the alternator into DC and regulates it to 14.2 v ). Yours is in need of some TLC. For sure you need to remove that connector and clean the connections as best as you can. The bad connections will only add to the heat generation and ultimately lead to failure of either the stator or the R/R or both.
Bad connections are common among many motorcycles. Take apart and clean connections and use some silicone grease to keep moisture out. If the connector are in very bad shape you'll have to replace them. The R/R may still be good but if the connectors are so badly corroded that may be reason to replace it.
1996 Vulcan 750
1980 XJ650 Maxim
Last edited by kontiki; 07-26-2009 at 01:23 PM.