Ran When Parked - Carb Question

[BPT]

For a variety of reasons, my bike has been sitting for a while, not ridden much at all since spring (started up a few times and around the block).
Started messing with it finally and it's running very roughly.  It'll start (not super easily, but it will) and needs some throttle to stay idling.  It stumbles when revved up, but then will smooth out if I hold it open.  It will idle but only at a bit higher than normal.

So my question is - is there one particular area that I could check and clear with the carb still on the bike?  Or will a complete teardown be necessary to get it going (obviously that would be optimal, but hoping I could just get it going for now, do a complete rebuild later).  I've read about the 2 tiny passages under the butterfly that are prone to getting gunked up and causing problems that sound like mine. 
I've already drained the tank and put fresh fuel in. I mentioned "ran when parked" because the carbs were set up OK the last time I rode a while back, so I'm guessing/hoping this is just a matter of ethanol fuel sitting too long.
Any tips would be appreciated. Please don't be too harsh in your criticisms although I do deserve it for my neglect. 

Thanks

[wilcom]

https://www.youtube.com/watch?v=wyspAHrMbb8

I use this YouTube animation to help me with "what hole goes where".

1. Drop the bowls and blow out with carb cleaner the little jet in the bottom of each bowl.
2 . pull out the idle adjustment screw and blow up and clear that passage
3 . Blow cleaner up thru the idle jet and the main jet.
4 . Blow out the idle inlet air passage at the front of the carb.
5 . Wait 5 minutes(in case there was a particle that needed to soften) and repeat.
6 . Let me add that you must have the red stinger/nozzle on the spray can to get enough pressure in the orifice to do any good.

If it ran when parked I'd put the idle screws back where they were and see if it will fire off and be nice.

There is one more orifice on the idle ckt. It's in front of the butterfly and you will not be able to see the cleaner come out the hole to make sure it is free. Not to worry, when you sprayed up the idle screw hole you were pretty close and it get lots of pressure and is probably free of debris.

Good luck

[BPT]

Thank you, sir.  I promise it did (run when parked), and that's why I was hoping to keep the adjustments as close to the same, if possible. 

I'll watch the video, thanks for the link. What you've described was exactly what I needed to know.  I was thinking I'd try something similar but assumed there'd be some tiny yet important passage I'd miss.
I'd already done the bowls and a basic spray on the underside. But when that didn't help I knew I'd have to get more specific.
Do you think a basic carb cleaner is enough or would Berrymans (or something else?) be necessary?

       Thanks again!

[wilcom]

basic carb cleaner is enough or would Berrymans (or something else?) be necessary

Here in California our cleaners and solvents are just a tad more toxic than  fruit punch. I buy what's cheapest and they all seem to work on carb issues like yours.

I think the pressure thru the passages is more important than the actual chemical content of the fluid. The important part is if there is residue from cleaning it will burn just like fuel. In Texas YMMV and one could be more potent than another brand, by all means get the deadliest witches brew they offer! 8-)

Let me add that you must have the red stinger/nozzle on the spray can to get enough pressure in the orifice to do any good. I know you know that but someone could read this a year from now and be a junior wrencher and not be up to date on all the things we take for granted.

[BPT]

Oh yeah, crystal clear on the pressure and red straw being necessary.  Last time I was running out of time and was trying to avoid laying on the ground.  But this time I know I'm going to have get down and dirty.  Just wanted to make sure I didn't miss any hidden spots known for gunk while I'm down there.

I happen to have some carb cleaner here - Gunk brand or something.  I believe Berrymans is stronger, sure smells like it.  They make the stuff that you can soak carbs in and I think the spray is similarly strong.
I'll try what I've got first and cross my fingers.  If I get a noticeable difference then at least I'll know I'm on the right track.

      Thanks!

[BPT]

Thanks again Wilcom. Sprayed like crazy, removed the things that I could from underneath and cleared them as well.  No obvious chunks of anything but hopefully cleared up some goo.  I did find two bad o-rings, then had another crumble upon reinstalling it so that required another hit of blasting. 

I did get it to run better than it was, but something is still not right.  It will idle at 1000 and above pretty steadily (a little rough but not horrible).  If I rev from there, it's better than it was - still not completely smooth but way less rough on that initial throttle twist.
The problem is if I let go.  When it drops down, it wants to die.  Maybe just a re-adjutment to the idle?
The other thing I've noticed is that for starting, it wants a lot of throttle.  This is completely the opposite of its usual personality where it was half to full choke, and then *barely* cracking the throttle before hitting the button.

I know a full rebuild is in my future but I was hoping I could put it off.  I'm thinking I might just need to start from scratch and do the valves and a full carb clean.

Thanks again for your advice.

[wilcom]

If I rev from there, it's better than it was - still not completely smooth but way less rough on that initial throttle twist.

That could be throttle cable adjustment where one cylinder is opening up before the other giving you an off idle hiccup(roughness). When I get my idle mixture set when doing a tune up I give the idle screw and additional 1/4 turn out(rich), seems to smooth the off idle transition a little bit

[BPT]

Cool Wilcom, thanks for the new tips. I'll give the 1/4 turn thing a try.  And I'll check the cables, although they "were" good before it sat for a bit.
All basic stuff, I know.  I just wish I could get it set once where I know everything is correct so that I have a good baseline to learn from. I've lost faith in the only local shop around here and of my riding friends, none ride airheads.
So I'll be on here asking for what sounds like elementary stuff as my frustration builds....

Thanks again for being helpful!