I had the larger type ballast which wouldn't fit in the binnacle so I mounted it under the mudguard.
I shouldn't think cooling would be much of an issue.
I've got one of Les's HID 50 kits in mine with the ballast inside the binnacle, it's the smaller one and fits fine, the lights are better, but the pattern on dip leaves a little to be desired, but main is good!
I've got one of Les's HID 50 kits in mine with the ballast inside the binnacle, it's the smaller one and fits fine, the lights are better, but the pattern on dip leaves a little to be desired, but main is good!