Timmy, I found the attached diagram for a CBR1000RR that shows pretty well how the pair system works on that bike. I figured it would be a symilar concept on the vfr.
I am still having a hard time finding where the problem is coming from. Again, symptoms are:
starts and idles fine
1-3k rpm runs fine
3-6k rpm hesitation
6k and up pulls fine
None of these symptoms were there prior to the pair valve removal.
I plugged all the exhaust ports by cutting the mount ends of the chrome tubing, welded the holes, and used new gaskets. I removed all 4 brass fittings on the intakes, replaced them with 4 screws off the pair valves, and used new washers from honda. Airbox tubing mounts have been plugged.
There is a small valve on the side of the carburator which had a small 1/4" tubing connected to the pair valves (it had a "T" that went to each pair valve. On the macrofiche it is item #43 ("VALVE ASSY.")
http://hawkworks.net/VFR750F-1997-fiche/carburetor_assembly.html
What does that valve do and how is it related to the pair system? Should that tubing be plugged as well? I plugged it and it did not make any difference.
Also there is another valve, called "purge valve", # 8 on the macrofiche http://hawkworks.net/VFR750F-1997-fiche/canister.html
I have no canister on my bike, so the tubing to the canister is open to air. This system appears to be completely independed, but would not having a canister affect performance after removing the pair valve system... I don't know... just thinking out laud at this point.
Thanks again for the help guys....
pairsmogCBR1000RR.pdf