So how the heck do you sync Mikuni Flat Slides?

[zoo mob]

I've synced carbs on SOHC4 Hondas before, but these look nothing like them an have no obvious vacuum ports.

[tkent02]

The vacuum ports are right there in your picture.

[Steve]

So how the heck do you sync Mikuni Flat Slides?

The same way you sync the stock carbs.

See that little screw that needs an allen wrench that is in the metal runner on the cylinder head?

That is where you put your adapters.

.

[zoo mob]

Oh yeah, I should mention that these are on a stock 1980 GS1100E with stock exhaust. The bike came with these any idea which model they are?

[Guest]

same vacuum ports no matter what carburetor

[zoo mob]

Well, I'm feeling like a moron I guess. Can I be walked through the procedure in a sentence or two?

[Steve]

I have no experience with those carbs, but your first step is going to be to connect your vacuum gauges.

Morgan Carbtune is highly preferred.

.

[zoo mob]

Anyone have a bit more insight on how to get this job done?

[Guest]

Take the tops off one Carb is not adjustable the other three have adjusting screws and locknuts set those three to match the nonadjustable one. Not hard to do.

[platinum2]

synq the slides? or the air flow?
slides are operated by the rod on top, check with mikuni on there site they might have exact documents for those, or set them all to open and close the same real easy like someone said already, if your talkin about carb flow there is a different style of flow tuner not the morgan multi hose style, i think those hose outlets are for air but thats all
are there hose outlets on all the carbs??

[rapidray]

Well, I'm feeling like a moron I guess. Can I be walked through the procedure in a sentence or two?

Hook up the gauges to the adapter tubes you install in the intake ports where the small allen screws are. Remove the carb tops. #3 is the "fixed" carb that doesn't move & you sync the other 3 carbs to it. The phillips screw on the top of each carb is the LOCK screw & the HEX nut is the adjuster. It takes very LITTLE adjustment on that nut to cause a BIG change in the sync. Turn the idle up to 2000-2500 rpm to sync. Call me at 714--356-7845 if you need help. Ray.

[AJ]

I'm not sure, but if that's an 1100 or 1150, send the carbs to me and I'll send you back a lovely set of 34mm CV carbs.

Or you can look at this manual for tuning info: http://www.zodiac.nl/instructions/234862.pdf

[zoo mob]

Thanks, this makes things abundantly clearer. It might be a couple of days, but I'll post back with results....and likely more questions.

[Homie]

As Ray alluded to in his post the adjusters are very sensitive with a little movement making a BIG change. The adjuster is not a threaded piece where you can fine tune it with a fraction of a turn. Instead it's a small offset cam that doesn't move much to make a change. In fact, the Mikuni manual I got from Sudco recommends doing a "bench synch" only on them. A bench synch is where you pull the carbs out and then use a small drill bit or piece of wire to manually set all of the slides to the same opening height. You adjust each carb (except #3 which is not adjustable) until you have a "slip fit" on the drill bit or wire much like you would when adjusting something with a feeler gauge. With the sensitivity of the adjusters, its a real tedious process.

[rapidray]

I've done bench syncs on them that were SPOT ON & they ran like crap till I got the vacuum gauges on & synced them correctly. Ray.