I've been down that road myself- and there s no difference so far as I can tell between the stability of the TBA and of my late and unlamented twin cam-neither gets blown around by trucks-I've just done a 260mile motorway trip on the TBA (80-90mph most parts )and noticed no difference-other than the improvemnt in handling of course..and the fact I wasnt stopping for fuel so often....and...and and....
Al
