VM29 smoothbore carbs on 80' kz750E

I currently have an 1980 kz750 E with mikuni vm29 smoothbores on it. These are cool carbs and they give me a lot of top end kick...but virtually no idle and low speed riding.
I understand that messing with the different jets can give me better low speed fuel delivery and idle.
Can anyone tell me what I would need to do to achieve this?

My other option is to sell my mikuni VM29 smoothbores with their K&N filters for some good money, and then buy a new set of carbs better suited to my city riding.
Any recommendations on a good set of aftermarket carbs for the kz750?

Those carbs are worth in the vicinity of $700. I'd sell them and get some stock Mikuni's or Kehin's from a 750 and go through them and replace all the O-rings and gaskets. If you are going to run pods be sure to get real K&N's or some pods from APE. Get a Dynojet kit too.

CVK's read all of this.

forums.kz650.info/index.php?topic=9383.0

I used to run a set on my 1979 SR650
I cant remember the jets but they ran great. Youll certainly have to jet them down.
which ones are in them now?

I thought about taking the ones off my son's GS 750E. He left it sitting there for 10 years and the carbs literally fell off. I'll have to take a ride to Sam's Cycle and see if he still has the bike in his bone yard. They were good carbs but I got tired of looking at the bike every day. Should have parted it out on eBay.
Steve

The bike came with these carbs and I'm assuming the carbs are in stock condition, which means they have a 120 main jet, 25 pilot jet, and the only information I can find on the needle jet says "5DL31-3"
I was thinking about going down to a 22.5 pilot jet and seeing if that solved my issue.
Would I have to change the main jets as well?

kawasakisubaru wrote: The bike came with these carbs and I'm assuming the carbs are in stock condition, which means they have a 120 main jet, 25 pilot jet, and the only information I can find on the needle jet says "5DL31-3"
I was thinking about going down to a 22.5 pilot jet and seeing if that solved my issue.
Would I have to change the main jets as well?

If you want to keep the smoothbores I'd pull a float bowl and take an inventory of the jets. Then do some plug chops to judge the mixture condition through various throttle settings. After you gather this information then you make an intelligent decision on what to do regarding the jetting. Jetting by nature is an iterative process. Measure, make a change, measure again, finetune, etc, until you get it right. It takes time, and money for jets.

Nessism is correct here.
But man if those are your jets then im sure your wayyyy to rich in the pilots.
Bst thing you an do is pull em apart and see what you have.
I think youll need more like 12.5 - 115 pilots and 110 mains.

www.jetsrus.com/carburetor/carb_mikuni_V...oded_view_parts.html

I got those jet numbers off this link. Detailing what comes on various models of smoothbores

I'm certain I'm running lean at low speeds due to the plug fowling and then the engine popping. It's totally fine about 3k rpm which leads me to believe the main jet is okay. But I'll pull it apart and check the jet sizes.
Thanks for offering input guys.

Plug fowling is almost always a rich condition. But hey we just taking here .
until you get em apart and see what you have you have no data.

Pics of the plugs?
Steve

@strum oops yes I meant rich.
I'll take some pictures this evening and post.