I had 100/80 H4 bulbs in the Teapot for quite some time and the wiring seemed to cope. Bear in mind that the dipped beam wattage is the one that will be in operation most of the time.
The 130/90 bulbs I put in later were a different kettle of fish. Fried fish, if you see what I mean.
I'd say don't do it. There are some good alternatives on the market; Philips X-treme Vision, Osram Nightbreakers etc.
The 100 watt bulbs are not street legal in the UK, BTW.
I also had stalk trouble, which may well have been caused by........you know what.