Reducing what risk? Has this been a problem before?
All 55w bulbs should be equal output according to the 55w spec (but are definetly not). I assumed the 55w one you put in was a super-bright-la-dee-da one? But then re-read your post says it was a regular replacement:upset:. A Sylvania SilverStar bulb is a good regular style bulb, not sure why it would melt anything.
Sounds like the housing was melted before, from a previously installed la-dee-da bulb? There are ways to heat and separate the lens (to repair the reflector), but you'd still be finding a whole assembly to replace it anyway.
I have played with many solutions to the notoriously bad OEM Buell lighting, LED, HID, and Halogen with mixed results. The CR loved HID (oncoming traffic did not!), and when the STT had a normal headlight housing, It liked LED's but only a few types of them. Some were useless, others worked pretty well.
Not sure what's going on with your bike, but a 35w replacement bulb will keep the lens from melting:eagerness: