>>The reason I ask, is because the "guts" of the Tomos machines are all the same---? Or are they.<<
Well, I don't much like the plastic, no...
As for the "guts", actually the head and trans of the Targa is different than the Bullets...and having ridding both, including other Targas...I like the Bullets a LOT better.
For whatever reason, the combination of head and trans in the A5 just does not seem to work, or provide actual improvment over the A3...and based on my perceptions of them...is actually slightly inferior.
Current project ? Mounting the A3 Trans to an A5 head, with A5 pistonarm swapout.
THAT might work, we will see.