I'm not sure exactly what i think is the best way to go about this, but I have had a hard time finding model specific threads in the forums before. model specific sections seem somewhat desirable in the main forums, but as has been mentioned already, much of the high performance information does cross-reference. maybe there could be an engine forum, a suspension/chassis forum, etc?
What if threads could be active in more than one section? Say a topic was started in the main tech forum, but is discussing a specific cb750 hi performance mod (or whatever), and could be moved to this section, but would still be viewable in the other... i don't know if that would take up unnecessary server space, but it could help a lot with keeping information from getting buried. if nothing else, a topic could be listed under "cb750 performance" for example, but hot linked to the original or a more specific section. the daytona 750 thread comes to mind, or yeah, the several threads about the cb550/650 engine hybrid that don't necessarily fit a specific model.
in any case, i like the new addition.