I really want to do this mod because I did it on my Zuma 125 and it worked fantastic. I bought some LED bulbs and light was night and day difference(no pun intended). If you got any ideas please chime in!
He said they fit in his post, and I want to remember they have the same flat side the H7 does, but something didn't seem right so I went to the garage and looked....the H7 circles are much smaller than the H4 or HB2, the OP_ did say he had to use needle nose pliers the first time, he seemed happy with the results but I never saw a post about driving at night after his modification, just the daylight pictures of both on....I carry a spare with me in case one goes out, I can't see me trying an already tedious job on the side of the road in the dark trying to get a lamp to fit a hole it wasn't designed for. I did buy some of the Oshram H7 that I may get to install this weekend, and the very first thing I did to the bike when I purchased it was to adjust and aim the headlights, when properly aimed they do a good job, better than the last 4 jap bikes I've had although the daymaker in the VTX1800 did a great job.MIg, did the H4 bulbs fit without difficulty into the H7 spaces?
My personal observation, when a bike comes at me with high beam during the day, is that I see only a blob of light. I can't tell how close, exactly what direction, how fast it's approaching, or if it's signaling a turn. And the glare discourages me from looking. The most visible and noticeable bikes I see have 2 small-diameter LED driving lights spaced well apart, plus 1 or 2 low-beam headlights.Back in the day I worked for a company that designed and built headlight assemblies for cars and trucks. Part of the design process was to model the reflector to the bulb so that it put the light where it was needed and not blind oncoming traffic with glare. This was all part of the DOT certification process that all manufacturers had to comply with if they wanted to sell their vehicles in the US. If you were to substitute a different type of bulb like HID or LED then while it might put lots of light out front, there is no guarantee that it isn't putting out so much glare that it affects oncoming drivers. But lots of people swap out halogen bulbs for LED's this day and good or bad, thats what goes down the road.
I ride with brights on during the day like many folks do for visibility. Doesn't make much difference to me that one or both lights are lit up. Besides using brighter bulbs which are perfectly fine, I would think about adding some driving lights if I did lots of night driving on dark roads.