VFR800 6 Gen fuel flooding front right inlet

Hoping for some help.

Just bought this 2003 VTEC with 30K miles on the clock.

After standing for a day or so, when firing it up, it tries to start then hydro locks stopping the starter.

Removing the airbox I found fuel pooling in the front right side intake below the throttle butterfly....other intakes are fine and dry.

Once fuel is cleared by cranking with that front RHS spark plug removed then re-fitting it, the engine starts fine and runs perfectly.

I suspected a leaking fuel injector, so replaced them all with a matched set from a low mileage bike with 10K miles on it.

Started perfect, and sounded smoother, BUT when engine stopped, I took airbox lid off and filter out, and can see the same front RHS inlet is again slowly filling with fuel!

Can't believe it's two faulty injectors on the same cylinder.

Another thought is that maybe the fuel rail return pressure regulator is leaking back into its vacuum tube and somehow finding its way into the throttle body inlet?

Anyone had a similar problem before I buy a new fuel rail or regulator?

Any help appreciated

 

Looking like a ruptured pressure regulator diaphragm letting fuel under pressure into the vacuum lines to the RHS inlets. Front is lower so it collects there.
About to strip it down again so will let you know if I fix it.

 

Yep, it was as above. Replacement regulator fitted and now all good.

 

Well done mate .... I’ll have to remember that

 

Yes, it was a strange one!

 

They go out alot on various honda bikes btw.

 

Didn't know that