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Syncing the carbs

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Syncing the carbs

PostAuthor: jonno51 » Tue Aug 07, 2018 2:48 am

Using a manometer or vacuum gauge (as opposed to doing it by ear), the tank needs to come off, and the advice is to rig up an alternative fuel supply. On previous bikes I've used a fuel tank from a lawnmower. I hear it is also possible if you are quick and things go OK to get the job done without an alternative supply, just using the fuel that is in the float bowls, but I've never tried this, preferring to give myself as much time as I need.

Enough background, here comes the question:-

On an 1100, can the reserve tank be used as the fuel source, will the fuel system operate without the main tank connected?

And if that does work, how cool would it be to go out for a short ride and pull up next to someone at the lights on a bike with no fuel tank?
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Re: Syncing the carbs

PostAuthor: bstig60 » Tue Aug 07, 2018 8:19 am

The fuel tank does NOT have to come off on bikes with Mikuni carbs as it is relatively easy to get at the sync screw on Mikuni's. If you have a good ear, you can get the carbs where they will be close by ear, but to do it right you need an manometer.. It is more difficult to get at the sync screw on Hitachi carbs, but it can be done without removing the fuel tank.
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Re: Syncing the carbs

PostAuthor: jonno51 » Tue Aug 07, 2018 10:05 am

bstig60 wrote:The fuel tank does NOT have to come off on bikes with Mikuni carbs as it is relatively easy to get at the sync screw on Mikuni's. If you have a good ear, you can get the carbs where they will be close by ear, but to do it right you need an manometer.. It is more difficult to get at the sync screw on Hitachi carbs, but it can be done without removing the fuel tank.


I was thinking more about the manometer connections - doesn't the tank have to come off for access?
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Re: Syncing the carbs

PostAuthor: Cusstout 1100 » Wed Aug 08, 2018 11:05 am

No, the tank doesn't have to come off; you will need to remove both pod covers (breather and AIS covers) to make access to the vacuum ports and sync screw easier.
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Re: Syncing the carbs

PostAuthor: jonno51 » Wed Aug 08, 2018 12:19 pm

Cusstout 1100 wrote:No, the tank doesn't have to come off; you will need to remove both pod covers (breather and AIS covers) to make access to the vacuum ports and sync screw easier.


Thanks for that.
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Re: Syncing the carbs

PostAuthor: Flyingdog » Wed Aug 08, 2018 1:12 pm

I've been able to slide the tank back to clear the rubber mounts and tilt the front, if that's all the room I need at the time.. Putting a block of wood or something, up it the tunnel, to hold it. That fuel and vent hose, kinda pita to refit...sometimes. :cl:
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