Aprilia rs 50 carb issues

Hi all back again got a 2010 rs 50 new shape but carbs seems to be off the mark 1
issue I got revs up to full throttle the minute you start it
I thought air leak so replaced inlet rubber and manifold gasket
Cleaned carb airlined the jets
Replaced all hose clips put all back together same thing happened ?
Picture of carb just to verify I'm right with hoses
Blue lines water feeds
Red line oil feed
Yellow line breather?
If I put my finger over yellow line breather? Won't start at all
But if start without finger over yellow line breather?it starts but revs up to full throttle
But if I put my finger over yellow line breather? Slightly I can control the revs?
Any ideas

 

Check the carb slide is closed when you re-fit it to the manifold and before you start it?

 

Just pulled carb off manifold this is where the slide is sitting
Not closed taken idle screw out didn't even move
Checked cable adjuster nothing
Needle to low?
Not the best of pic sorry

 

Cable at the grip end?

 

Thanks for reply checked already had throttle off about ten times
Had slide out of carb ten times to make sure it was in properly
Cables not bent or kink anywhere choke side or throttle
gonna move needle tomorrow
C if it make any difference

 

It could be the mixture screw. Try turning it in half a turn to richen it up.

 

Tried that makes no difference at all
Only way I can make it idle is by putting my finger slightly over the hole marked with yellow line in first picture

 

Take the cable off the carb slide, take the idle screw all the way out, if the carb slide drops fully closed then the throttle cable is marginally too short. There may be an adjuster in the throttle cable about half way along, maybe......
Another thing, the swan neck into the top of the black cap can be screwed in and out quite a bit, but that carb slide should be fully closed with the idle screw taken out.

 

Oh yeah, they have a cable to the oil pump too.
Ive seen one of those splitter bits jammed open before, like the cable pulled out of it if that makes sense?

 

Thanks for reply
Took cable of the slide and idle screw back out gave the slide barrel a slight rub with wet/dry
Check splitter where cables meet nothing still sitting in same position as picture
So my thinking now is definitely needle have to check tonight after work

 

Bent needle maybe?

 

Sorry for late reply working late had no time for bike till today
Yep bent needle all sorted
Thanks for replys
Got another issue now started new post Thanks once again