I don't believe its an electrical issue such as a side stand switch, battery, etc. It feels more like a fuel shut off...its fairly soft in nature but does jerk the bike when it occurs. The duration is about 1/2 second...maybe a bit less. There is no backfire. It does seem to affect both cylinders at the same time.
If it were an electrical issue would it not be random at all speeds/rpm and throttle positions? As mentioned above it only happens at really small throttle openings...barely cracked and does intrude on take off sometimes. As soon as throttle position is more than a few degrees past affected area it is fine.
I thought about the intake rubber boots as there are some fine surface cracks. But wouldn't there be a leanness and backfire on deceleration?
TPS? If it was not set optimally would very small openings be at the first part of the potentiometer?