need CV carb exPERT

[KEITH KRAUSE]

Another thought after reading back. May not matter and the new mixture screws you installed may be just fine, but unless there's obvious damage to any screw, I would never substitute aftermarket screws for genuine Mikuni.
They are precision made and any difference in length or shape will throw normal adjustment off. Brass is generally good for continued use, unless the screws were damaged.
Same thing goes, even more so for for any fuel or air jet. Keep Mikuni parts in a Mikuni carb if at all possible. An aftermarket jet kit is something else but swapping jets/screws just because they're new can create problems.

[Road_Clam]

This thread is making my brain hurt. LOL

I only have a fair amount of Mikuni CV experience. My main expertise in Mikuni VM's. I can tell you from 22 years of jetting motocross bikes, and snowmobiles, my above mentioned thought process as far as tuning the idle/low speed circut always produced my desired outcome. Mikuni VM's however work the opposite of CV's. Closing the mixture needle richens the mixture, and opening the screw leans the mixture. I'm here to learn, not cause trouble, so I am simply going to agree, and leave this one alone.
Rich

[nert]

keith
at the time, the back of mind was echoing that same thought. The front of my mind wasn't listening. (some times i feel schizophrenic).
Anyway, i neatly saved all the old jets, even the gasket and o-rings. Some parts of me are smarter than others. Hell, i think i still have some needles and slides from the old BSA Amals.

[KEITH KRAUSE]

This thread is making my brain hurt. LOL

I only have a fair amount of Mikuni CV experience. My main expertise in Mikuni VM's. I can tell you from 22 years of jetting motocross bikes, and snowmobiles, my above mentioned thought process as far as tuning the idle/low speed circut always produced my desired outcome. Mikuni VM's however work the opposite of CV's. Closing the mixture needle richens the mixture, and opening the screw leans the mixture. I'm here to learn, not cause trouble, so I am simply going to agree, and leave this one alone.
Rich

This specific subject has caused me trouble too. I also understand the VM carbs well and know their side pilot air and pilot fuel screw functions.
It's when there's a problem with the circuit that "unusual" things happen that I found hard to understand at first. I'm learning too.

[KEITH KRAUSE]

keith
at the time, the back of mind was echoing that same thought. The front of my mind wasn't listening. (some times i feel schizophrenic).
Anyway, i neatly saved all the old jets, even the gasket and o-rings. Some parts of me are smarter than others. Hell, i think i still have some needles and slides from the old BSA Amals.

Well, as I said, your new jets/screws may have nothing to do with the problem but it's a possibility. Using genuine parts, when precision matters, just gives you one less possible problem.

[nert]

If any one should want a .pdf file of the sync screw mods. Send me a personal message with your e-mail address. i can e-mail it. Don't know how to post it.

[toymechanic.]

HEY, you have the same bike i have!! mine is the blue

http://www.factorypro.com/tech/carbtune,CV,high_rpm_engines.html

According to the CV Carb Tuning papers i have. Fuel level, even within range will make a very big differance in performance. And i can say, without reserve, it does. The little black plugs are new and seal well.

Thank you for the answer on the pilot screw question.

Yes, i would like to share the mod. I put together a .pdf with directions and photos. Don't know how to make available other then send by email.

Nert,

My bike is soon to be two-tone dark blue and light blue.

Gary