So I Replaced my COBRA II Headlight Bulb...then after riding that night I noticed that the Glass cracked! My First thought was that maybe I overtightened the metal and or chrome rings although I was careful not to do that...but then I thought that maybe it cracked because the Halogen Bulb I used to replace the original might have created too much heat.

ANY IDEAS as to WHY this happened OR where I can get a glass replacement?

 

Did you use the glass that came with the Cobra II? I have the same headlight, but used the glass from my stock light. If you want the glass from my Cobra II, you can have it for the cost of shipping.

 

That would be GREAT! I'll pm ya now...

 

I fitted a high wattage (100W) bulb to one of my bikes a few years ago and it got so hot that it melted the socket that it fitted into. Never heard of one cracking the glass but I guess it could happen.

 

I would suspect mechanical stress and not heat as the culprit.

 

I put a PIAA in my Street Bob headlight and rode in the cold rain and it cracked. I never found a conclusive answer if I had tightened it too tight or if it was the heat. I’d say there’s a chance it’s too much heat. I just don’t think I tightened it that much.

 

A buddies Cobra headlight did the same thing after putting in a new bulb.

On another note mine seems to like bulbs. The bulb that came in it only lasted about 2k miles and the replacement I put in it went out yesterday at about 3k miles.

 

That's weird. Even after reading about the short life expectancy of the Silverstar Ultras, I put one in anyway. That was last summer and 8-10k miles ago...

 

A silverstar but a step down from the Ultra was the one that just blew.

I put a Cool Blue in it this time to see if it would last longer.