hey hey, now thats quick! It can occur as low as 1000 (going up hill) and over 3k on the high end (flat parking lot). Its almost like when there is X amount of torque, it happens.

I've gotten up there with the RPMS without the hesitation, however I think it simply becomes less discernible the higher it goes.

Tonight I'll have someone ride with me to detect hesitation at high RPMS.

I will also try and locate some hose tonight and snoop around the engine.

I appreciate your insight & will post the findings.