I do NOT think, nor agree with a trike takes a different base tune, at all. The tune is about the ENGINE and how the VEs are derived. Same way, both bikes. What DOES differ... is AFTER a tune, a trike will have a different cruise area and more resistance going down the road. This is nothing more than a map based Lambda bike using more map to go the same speed. Fueling should NOT be different at all.
And to those that think fuel equals a cooler engine, in and by itself? You actually are mistaken. A whole AFR point will lower temps about 5*F. What REALLY lowers temps, is a full on tune that makes the timing match the load, and this MAY differ from its two wheel cousin, but again... that is not about the base map, that is about tuning the bike.
Base maps are NOT finish maps... as we all know we should tune to the bike in question. So, even on a 2 wheeler, we alter timing, etc to match the bike itself.
Can you, 2008, name ONE setting that should be thought of as different on a trike -vs- a bike? In a base map?
I would gladly street tune a trike, and I would start off with the same base map as a bike, as far as engine config, etc.
I feel you are confusing the end tune with a base map, and they are not even close on a whole lotta bikes. TTS is NOT about the same stuff PV is. TTS is about giving you enough tools to truly bring a bike/trike into a great tune. PV etc, have slightly limited capacity on tru base maps, and instead release their base maps as truly running maps. But... things get missed with that approach, IMHO. Remember, a true base map includes every function it takes to start and run a bike. ALL of the 100+ hidden settings are adjusted towards the true base map's config. SEPST kind of does this and TTS does this. PV, OTOH, take the tune from the bike, alters the tables and shoots it back in. Everthing that PV can adjust, is adjusted... but how about those 100+ hidden settings? Nope. A PV tune can NOT be shot into a blank ECM and expected to run, unlike a SEPST map or a TTS map, both of which CAN be used on a blank ECM.
I mention the above, because folks that have an idea about PCs and PVs mistake their running maps with a SEPST and TTS BASE map. Two different things, my friend. A base map sets the hidden setting for the engine config and goes far enough to have the adjustable tables close. It is up to the tuner after that to bring these things home. PVs and PCs generic base maps can be run as is, or with a PV, fine tuned to a degree. BIG difference Amigo.