low beam keeps blowing
 

Hi I have a 1999 cbr 1100xx super blackbird in the past 4 months
The low beam keeps blowing bulbs within weeks of changing them the hi beam bulb is fine hasn't blown in the 2 years i have had the bike does anyone have any clus as to what may cause this

An over charging system can blow bulbs....

would that not blow the main beam bulb as well as they are 2 separate bulbs

are they h7 65w (high) & 55w low ?
change them to h7 55w, x2.
the 65w or some 75w upgrades are thinner and can blow easier on rough bumps and switch surge when changing.
55w not so easy.

and if you want then brighter, ya can get 55w ultra brite(blue lens but white light)
i' had the chinese cheap blue h7's in my bird for 2&half years after blowing 2 bulbs.
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if you have a gel battery, that can cause spike damage too, and blow rectifiers etc, so acid battery in a bird.
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something to try