1983 GS1100ES Carb Sync Question

[Guest]

I have never sync'd the carbs on this bike. The shop manual it says 1 and 4 should be slightly higher than the inner carbs. However, on CarbTune manual it says to set them all the same if the airbox is removed. I have airpods installed on this bike. Should they all be set the same in that case?

On another note, I was getting everything ready and was looking for the intake port. Has anyone had any issues removing these allen bolts? I soaked them in PB Blaster and I am letting that soak a while.

Any other things to look out for on this process?

IMG_20191012_134535.jpg

[Nessism]

You can set them all level.

Never had trouble removing those screws, however I never had a bike where some previous owner striped the screw either.

BTW, there should be a small crush washer under the screw.

[last337]

Thanks! Yep, they ended up coming out just fine. I noticed the crush washers when I pulled them off. The adapters have o-rings so I will just keep them off when adjusting. Should be pretty straightforward from here.

[Steve]

I never did understand why the recommendation to set the outer ones to a higher vacuum level. I had always set them straight across before even seeing that.

Just a bit of trivia: I have compared the "half a ball" difference with the stock gauges to my mercury gauge. That half a ball is 2cm of vacuum.

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