I have upgraded the headlight of my urban assault sumo! When upgrading or replacing your stock headlight you will be requiring a H4 bulb. Of course you can go with another stock headlight there are much better lights that give a brighter light and actually draw less energy or the equivalent energy from the bikes electrical system. This is important for maintaining reliability and not over taxing the bikes system.
I upgraded to a PIAA 10904 H4 Intense White - H4 60/55W=135/125W Xtra Intense White Bulb. It is in my opinion a much brighter headlamp.
Shopping around I found them in a twin pack for $42.00 with free shipping. Regardless of the price you find you I am confident will be very happy with your purchase.
