http://forums.sv650.org/showthread.php?t=228411
Have a look at these - have these classiccarleds H4 LED bulbs in both our cars and my SV and they are great, much better than any filament bulb I have ever used. They have all passed MOT with LED fitted.
These bulbs are about 6500K, very white and are really noticeable in daylight, a real plus for a motorbike..
There are dimensions for bulbs on classiccarleds website, my SV is an AL7 with single headlight, your shrouds may or not fit, but on our cars it was easy to get the rubber seals around the bulb and then screw heatsink back on, the constant current module and plug are waterproof.