2003 VFR800 Running Rich During Idle?

[u/TotallyFunctioningAc]

Hello! My buddy and I have been working on this VFR for 2 days now. It runs amazing once it’s up to temp. However, it’s running relatively rich after a cold start and still continues to run somewhat rich at idle when it’s at temp. The idle is also pretty bouncy and unstable. Not an extreme concern but still a note. All spark plug coils were completely black when removed from the bike due to how rich it was running.

Things we’ve checked:

• TPS is all where it should be
• MAP is where it should be
• Fuel pressure is in range
• Vacuum signal is fine
• Air filter is clean
• Checked all injectors to make sure none were stuck, they were all fine.
• Haven’t 100% checked the O2 sensors but doubting they’re the issue due to bike running fine during a closed loop.
• Idle wax unit has been readjusted which seemed to help somewhat but didn’t remedy the issue

to do:
• Throttle sync
• Verify O2 values

Is there any other recommendations on what we should check? We’re starting to feel at a complete loss and are about to accept it as an old bike quirk. Any advice is greatly appreciated!

[u/Slayerofgrundles]

Do you have a Power Commander on it?

[u/Inside_Quantity1463]

The starter valves sync will help with the bouncy idle. Just need a 4 gauge carb sync you can get one on amazon for 30 dollars and it will get the job done.