It seems ur battery is nearing its retirement, hence the HID is working fine with ur friend's bike. Once the battery voltage drops below 10v, the HID starts flickering and the charging rates in the stock condition are very low which makes it more worse. If you change the battery too, things will not be much different, change the charging system if u want to continue with the HID.
BTW, Since u mentioned it as H3, Is it an aux lamp?
Another bottleneck is the magnet power, if the magnet is too weak to support a rewinded coil, the result will be worse than the stock condition and waste of time and money. I cant say it will give guaranteed results.




ur HID kit is good.
.being a Ug4 180, i m void of even the kick starter.

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