Recently I just got myself a '11 Felt Z100 with a Sora FD.

After adjusting, cleaning, and lubing the front mech, I'm still having some problem with chain rub.

The problem occurs with the middle chain ring in combination with at least a third of the gears in the back. What happens is after I shift to the middle chainring, the inside of the cage rubs against the chain. If I push on the FD with my hands, I can get space between the chain and the cage (it stays there), but if I apply tension to the cable or shift the FD away from middle and then back, it's touching again, until I again, have to manually move it.

I figure it would be dirt in the pivots causing it to stick so I WD40'd it, let it soak, then cleaned it off before applying some White Lightning but still the same result.

Also, the bike is tuned up and checked by a mechanic so let's assume the limits/angle/clearance/cable tension is not the issue.

Could it still be dirty pivots or does the spring not have enough tension...or maybe it has something to do with trim adjustments? The bike has low mileage and the FD looks practically new.

Thanks in advance!