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Well, as I was gathering things this weekend to get ready to do a carb cleanout and check my cylinders, I realized my busy schedule was too much to handle a project like this.  So I went to my motorcycle shop to drop off the bike and explain the continuing issues (most recent was that the idol, all of a sudden, was really high and bike was overheating).

But as I got up Saturday morning to do this, the idol was still high - but my troubles seemed to go away.  The bike was idoling on its own without clutch, it took off in 1st gear with both cylinders firing it seemed, no putts or jerks from stop lights.  Only a temp issue it seemed after 15-minutes. 

As I got to the mechanic, we adjusted the idol knob together and it was sounding nice on its own. Mechanic agreed and no need to take it apart to mess with anything (especially since it's intricate and would cost me 600 bucks or so for the mechanic to do it).

Rode it yesterday and it's doing great-better than it ever has. Now the temp gauge issue may be a bubble issue in the line that is sitting on the sensor and causing the bike to look like it's overheating (according to the mechanic)?  He said shake the bike while it runs to move the bubble to the top of the system to see if that helps.

But other than that - the carb/imbalance issue seemed to work itself out from running it for about 1000 kilometers since I had the initial problems, and after two seafoam inserts. Coincidence? Normal? Maybe the mechanic was right when he said "just keep riding it" to get the carbs to burn out some of that gunk?  So- I might say "fuel additives-YES!" at this point - I still feel like I should dedicate some time to take a peek myself - but it's running good now and don't want to disturb it! LOL  Anyway, finally enjoying riding it again and I'll keep you posted on this subject as I go along. I've copied your posts/instructions for a future date of work and bought one of the 4-cycle synchronizers so I'm ready.

Thanks for all the help. Please post your thoughts to this latest development if you have any.

-Nic

Wow Max thanks!  I was going to ask you to pull that out and you're all over it:)

I took the Zombie advice and added sea foam this morning and will add some the next gas-up. Love the checklist post; I will copy and begin as soon as I can. I stopped at Auto Zone to ask about a vacuum gauge and they gave me a blank stare and had no idea what it was.  Is this something I get at a motorcycle shop or something maybe only available online? I see all kinds online from $4 to $60. Is there a certain brand or type I should look for when you say "buy a cheap one?" Are there ones that are too cheap?

I'll definitely keep you all posted here so others can benefit from the solutions.  Thanks again - Nic

So Max,
Are you saying that if the carbs were cleaned out last year, and the bike was not run a lot before I got it - it still shouldn't be acting like this? Not enough time for the jets to get "gunked up" again?

If I don't know anything about taking my carbs apart and cleaning, could I ruin/break stuff attempting on my own? Or should I attempt to "play around" as you say? Use the manual and "You Tube" and get started I guess:) Or should I begin with trying the additives for a few weeks?

Another question - How much time should I plan for if I'm going to attempt my own carb cleaning and balance the cylinders? - Nic

Awesome Venox team, 
I've seen similar posts in the scooter forums but not in the Venox, so wanted to run it by you all.
Are fuel additives like STP Fuel System Cleaner for Ethonol or the Sea Foam or Star-tron (from the scooter forums) good in the Venox?  My Issues:
-My 2007 Venox doesn't idle until warm and run down the road a bit (I start it with choke on).
-Slow to jump off in 1st at stops (like one carb jet isn't kicking in until late)
-Occationally stalls while slowing or stopping unless I ride the throttle and keep it going
-runs well once in a constant speed (runs better in a higher than called for gear-ex: runs better in 2nd when I should probably be in 3rd, better 3rd than 4th, etc)
No other issues.
So, a guy who used to work for Kymco, demo'ing the bikes said put the additive in.  I heard it may be bad for Venoxes.  Also heard (but don't know anything about) of the sea foam and Star-tron?  Where can I get them and are they ok for our Venoxes?

(Background) - The previous owner didn't run it much, carbs were cleaned last year sometime, but the guy still didn't run it well. Using Super unleaded gas. - Thanks for your help! - Nic