Convert to H4 (P43t) sockets & Xenon bulbs
I also have a 3AJ Tenere with two 35W bulbs that I want to improve on once I have got the reflector aim sorted out.
My previous 3AJ had two 50/55W halogen bulbs fitted by a previous owner. I think the wiring sockets that the bulbs fit into had been forced to accept this size of bulb (H4). I was happy with the headlight on that bike but if I did a lot of stop start riding around town it could run the battery down, possibly because the alternator was only designed to cope with 2 X 35W, not 2 X 50W. I considered fitting a switch in the 0V line of one of the bulbs but never got round to it. I had the alternator windings fail (the coil that provides power to the CDI, but this lives amongst the other coils), and after I changed them I didn't have a run down battery again, but possibly I wasn't doing those stop start across town journeys any more.
With my new (to me) 3AJ I intend to verify that P43t H4 bulbs fit its reflectors, and if they do I will see how the wiring socket fits the back of the bulb. I expect that I will have to change the sockets. I will then fit 60% brighter Xenon H4 bulbs such as those available from Brighter car headlights
, but also available in most car accessory shops and if they run the battery down I will try replacing the rear lights with LED's. If that doesn't help enough I may fit that switch in the 0V line to one of the bulbs.
I may also try running the bulbs through relays to remove voltage drops through the tired old wiring.
It will be a lot cheaper than HID and when I fitted one of these bulbs to my wife's XT600E I was more than happy with the headlight.
Hope this helps