Resurrection after being totaled

 

Wow I'm loving this, not been around for a while and this was a nice surprise!

 

I sold my Dynojet dyno and was never paid as promised, so after 5 years I demanded restitution. Either I get paid what we agreed on, you deliver goods in the same amount, or here is my lawyer's phone number so you can call him.
His response was to show me a 1999 CBR600 F4. The battery was dead, the tank was rust, and the mileage was 3,089 miles. The bike was in good condition mostly, so I agreed and that started the fun.
I have been in the industry since 1970. From technician, parts man, service manager, general manager to owner for 38 years. Raced and built many engines for customers with great success. I have hours of unknown times spent tuning a set of carbs or remapping FI systems. I feel very comfortable being a resource for those less familiar with motorcycles, and I taught motorcycle mechanics for 22 years.
However, this F4 is a nuance I have yet to understand. There are two systems with hoses that connect to the intake and either vent the crankcase, which I get, or hoses that add or reduce air flow to the carbs. I believe that in a rush to supply the CBR with better carburation they added the Ram air system, and the carbs were not reacting properly, so they added the air system.
The carbs were disassembled by others before me and after repairing the mistakes of others, resetting clearances, replacing many if not all "O" rings, and actually having the bike run at a smooth idle, I have a new issue that stumps me. It has a new fuel valve, a new fuel pump, new filter, and when I park it with the bike on a Pit Bull stand, turn fuel off, run engine till I hear it start to lean out and then shut the engine off. When I come back 8 hours later and start it, it will be liquid locked. If I wait 12 hours the gas will leak past the rings and the bike will start up.
Any ideas?

 

Welcome. That's a pretty clean looking bike overall.
Did you fully breakdown the carbs when you cleaned them? These carbs are great but are incredibly finicky when it comes to needing to be spotless everywhere.

From the pics of the bowls, I'm guess a good soak in carb cleaner and an ultrasonic cleaner would be a great start.

 

My '99
It'll be nice to have it back on the road having bought it written off ;-)