twins are way better on gas, and are faster on short runs. Triples will use alittle more gas, and will beat a twin of the same displacement in a long run.
i really don't know why people say twins run out of breath, maybe my sled is an exception. i can beat my friends 580 popo triple all the way to 100.(or as fast as that specific field allows )
not to argue over something so small, but both our motors are the same displacement and the twin is faster.
mine does have the rave valves and i pull ahead at the begining of the race then i don't gain any so that might be the reason. i don't know how it will go now that i have a properly working secondary clutch though.