I'm shopping for a single or twin cylinder dual-sport bike. It will be mostly ridden on the street, and a large part of that in Bangkok. Some is likely to be off-pavement, which is why I'm looking for a DS bike rather than a full street bike... My air-cooled HDs did not like sitting in Manhattan traffic - in fact I'd have to shut them down in the worst summer conditions and let them cool off a bit. Is there any reason to prefer air or liquid cooling for a large displacement bike in this climate under those conditions? Tks for your comments.