I think stem mount is the way to go, but I have a GPS mounted on it, so this is why I mounted my Canon on the clutch handle bar. Even with high ISO, images were terrible, too much noise.
As a part time photographer, let me edit that for you: "
Because of high ISO, images were terrible, too much noise." The higher your ISO setting, the more light-sensitive the camera becomes, but you're trading out for more noise - there's no free lunches in photography.
Pedantic mode on:
The goal of photography from a technical standpoint is to get enough light onto the film to let it see the image you want it to. You get 3 knobs to twiddle for this: ISO ("film" sensitivity), shutter speed and aperture (how big a hole you're letting light through). Each knob has a specific trade-off you're making for that light.
ISO trades light-sensitivity for noise (digital) or grain (film). An ISO200 film/setting needs much more light to correctly expose the image, but is very low noise. ISO 1600 requires much less light, but is very noisy in comparison. Fancier digital cameras can help with this (Nikon's D300 is reported to be "usable" above ISO6400, for instance) but the trade is still there.
Shutter speed trades motion blur. The longer the shutter is open, the more light you get... but the more likely it is for your image subject to change (this is the big fight for motorcycle photography, especially with the FJR).
Aperture trades a bigger hole (more light) for depth of field. My F/1.4 lens setting is a pretty enormous hole in the front of the camera, but at that setting I'm only able to get a few inches of depth in focus (the subject's nose hair is nice and clear, but the ears are blurry). At F/22, there's less light, but the amount of focal depth is much, much deeper - the person right in front of me is in focus and so's the rest of the park behind her).
As a photographer, your job is to figure out the balance of those knobs that gets you closest to the picture you want (or you cheat and add more light with a flash, but that's not entirely practical on a motorcycle). Camera presets will put the settings into the ballpark for particular types of shots - sports photos typically want to freeze the action, so it needs a very short shutter speed... and so the camera typically dials the ISO settings up to allow that; portraits like to have the background blurred out, so the camera selects a smaller aperture... but then needs to drop the ISO sensitivity and/or shutter speed so the big hole doesn't let too much light into the image and over expose it.
Pedantic mode off.
