AeroSpark,
If I zero in on your reference to "smaller" aircraft, I assume that you refer to light, non Transport category aircraft. Smaller transport category aircraft like the Jetstream 31 still obey essentially the same rules as a B747, and V1 is called.
If my assumption is correct that you do refer to light, non Transport category aircraft, such as the Beechcraft Baron, Partenavia PN68, single engined aircraft etc., then there is no certification requirement that the aircraft be able to reject a takeoff by no later than V1 and stop within the available runway length, and thus no V1 is calculated, or available.
If no V1 is available, then it cannot be called (but even if it was the pilot would be talking to him/herself).
Regards,
Old Smokey