If your headlight uses a H4 bulb, you can try running a 100w bulb which will be quite a lot brighter BUT will place more load on the charging system. If it all works ok with a 100w you can just leave it and not worry.
If there are problems running a 100w bulb the next choice would be to use a HID. (high intensity discharge?) not sure what it stands for but basicaly they draw the same current(ish) as a 35w bulb and are very bright. The problem with HIDs is paying for them coz they aint cheap.
Let us know what you decide.
I am assuming that your currently using a genuine Suzuki headlight.
If your using a cheap (often rubber mounted) headlight they are often 35w incandescent bulbs held into second hand mince pie cases and they are only there to act as a position light and meet road traffic act requirements.