33mm smooth bore carbs

I know this has been brought up some time ago but does anyone know which one of the ports between the carbs are vents and which one is a vacume port haveing trouble finding this info. thanks

there all vents. there are no vacumes on vm33's. go to sudco for parts diagram. if u cant find any pm me. i have them.

mark1122 I sent you a pm.

Just out of curiosity... Not that I require mind you, new carbies on mine...

Does Sudco also offer carb re-builds by their technicians?

I know they have re-build kits and such, do the pre-jetting on the Mikunis and Keihins they sell to distributors (aka... Dynoman) but was wondering if they also do repairs and re-builds...

OMR

Sorry these are 34mm

Or is this them?

it would be the last set, the first diagram are flatslides.

it is the last set,now which one of the ports between the carbs are vaume and which are vents?

There are no vacuum ports just vents’.u can see the vent tubes i have on these the other 2 carbs have the same port so they would be vents as well. i could not sync these. u would have to drill the manifolds and glue in some nipples. mine ran fine with a bench sync. as do my RS34's.
what would be the advantage of porting the bell mouth as u can see in this pic? i'm thinking it may have smoothed airflow and in turn, improved the signal? i bought these in 1980 of a road race bike.
did u get the file i sent? i need to convert the pdf so i can extract the page u need some how??? anyone have knowledge of were i can download a free file converter?

here is some more info. you should try the .06 air jets.

Here is a page from Greg Copes tips (i think thats his name,big racer back in the day). this can be found at APE's web site now.

mark the port I'm refereing to is the one on the third carb in from the left in your pic right behind the spring I was told that one needed to be capped off according to what other page shows I need a 15 pilot jet right now I have a 20 can't remember right now what main jet I have.