synching 1200 carbs

[Dusterdude]

im finally at the point where im ready to install my carbs back on the bike.question is,do i set the air/ fuel mixture with a vacuum gauge first or do i sync the carbs first and then check air/fuel mixture second?thanks

 

[desertrefugee]

Really doesn’t matter, but I tend to use the idle mixture screws as a last fine tuning point. I don’t recall exactly how far out they should be on the 1200, but set that up as a baseline. I think it’s 2 1/2-ish… Not sure.

If you leave the sync gauges tied in, you can reconfirm that everything’s still balanced after that final touch up.

 

[Dusterdude]

Groovy,thanks.that's what ill do

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[Dusterdude]

A little update,fired it up yesterday,of course its rough.but I hope syncing will correct that.one question,it did not want to start on choke with the plenum open,it did start and idle when I shot some carb cleaner into the plenum.should putting the air filter assembly on correct that issue?thanks

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[Dusterdude]

Ran it for about 5 minutes or so and its running better,it revs up good.going to mount the tires and bleed the brakes before I mess with the sync.

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[ChickenWing]

im finally at the point where im ready to install my carbs back on the bike.question is,do i set the air/ fuel mixture with a vacuum gauge first or do i sync the carbs first and then check air/fuel mixture second?thanks

Synch the carbs first to adjust the butterfly and the work on idle mixture.

 

[julimike54]

Synch the carbs first to adjust the butterfly and the work on idle mixture.

You do realize you're posting on 2-3 year old threads, some of which the person you're quoting haven't been on the forum since that time?

 

[ChickenWing]

The info posted may help upon reading the post.

 

[julimike54]

Ah....

 

[TwelveGaugeSage]

Bikes this old, it can't hurt to have a few necromancers around...

Seriously though, he has a point, it helps people reading the thread even if the ones quoted are long gone in one way or another.

 

[ChickenWing]

im finally at the point where im ready to install my carbs back on the bike.question is,do i set the air/ fuel mixture with a vacuum gauge first or do i sync the carbs first and then check air/fuel mixture second?thanks

Ensure all pilot screws are all adjusted to the required turns and then do the synch, 1. All. carbs are to match the #4 carb, 2. Do the carbs in order #2, #1 and then #3, Rev the engine between carbs.

 

[dan filipi]

Are they sync'ed to #4 on 1200's? Interesting the earlier years were sync'ed to #3

 

[ChickenWing]

Are they sync'ed to #4 on 1200's? Interesting the earlier years were sync'ed to #3

I have an 84 GW and the Cylmers maintenance book say to conduct the synch in that order, the #4 carb is the only one without a synch screw and that is why the rpms are controlled thru the screw for low or higher rpms.