Motorcycles are tough to get light to shine in the direction of the turn because they lean and so dip that side of the headlights. Not sure what the beam spread looks like with your LEDs but the stock C-14 headlights are really quite good for halogen lighting.
The reflector forms all of the pattern, except the top cut-off. The LED bulb just has to comply with the H4 filament location the best it can and position is incredibly important. If it is done correctly, the pattern should be the nearly same as with the stock halogen bulbs- but since it is whiter and brighter, flaws in the reflector pattern will be more visible. And the slight alignment issues with the LED light source not being a very tiny continuous filament (or gas) creates some additional artifacts. The worse the design, the worse the artifacts.
The C14 doesn't have a straight cut-off all the way. It bends the reflection of the bulb's cutoff (which is a metal shield) to have a "kick" on both sides. I believe that is intentional to help light the sides higher, which is useful when leaning. Unfortunately that kick does place the beam in other vehicles' faces, even when adjusted correctly. Fortunately, it is only a small section.
Ideally, a motorcycle really needs either self-leveling headlights, which is very rare. Or cornering lights that come on only when tilted, to add light where it is needed (either one side or the other). They must turn off when not tilted, because they would blind other drivers. That type is also rare, but the H2SX has such lights, which I thought was interesting. I do wish I had something like that for night riding in curvy areas, especially where I can't use high beams (due to oncoming traffic).
I upgraded mine to HID long ago and really like the light output; it still have a very reasonable beam with reasonable light cut- off (not too much light above the cut- off line) but they are much, much brighter than stock.
That was my second headlight upgrade (HID). They are much brighter. But they also are VERY hot, and damaged some of my reflector. They also take time to warm up, and the transformers are annoying. When LED finally got capable enough, I ripped out the HID and used LED and I like them much better. I do think the LED pattern is better, although it is a bit less light and the light is not as consistent across everywhere (because of the 4 emitters). Much easier to install, better light color, instant-on, no transformers, MUCH less heat (although they do have large heat sinks on the back, fanless- you don't want fans), and much less power consumption.
As to the color, tungsten lighting is toward the warm or yellow side of white while 6,500 K is well to the cool or blue side of white. It is generally accepted that 4,000 K (usually 4,100 K in practice) is the whitest light. [/quote]
But sunlight is around 5,500K on average- so I think that is probably the best color for headlights, since our eyes evolved to see the world in that light. LED lighting has a worse CRI than HID, though... so the resulting colors we see are not as "correct" when illuminated with most LED lighting. Cheaper bulbs have a worse CRI, and you will probably never see a CRI rating on headlight bulbs, unfortunately.
