Re: syncing carbs

Posted by LukeM on May 31, 2013; 1:31am
URL: http://vintage-and-classic-hondas.81.s1.nabble.com/syncing-carbs-tp4041517p4041526.html

Did your kit come with 4 little plastic restrictor thingies?  What these will do is smooth out the pulses of vacuum coming from your carb bank. They go in the line between the hose and the gauge.

OK, from what I saw on your video, the swing on the needles looks about the same.  They will move the most at idle, and gradually smooth out as you increase the idle.  The goal is to have the same reading across all 4 gauges at idle, part throttle, and half throttle.  You can try it at full throttle, but if you just run it up and get off of it, that should be sufficient. You may find that some RPM ranges will give you a more sync'd reading than others.  Rarely will you get a perfect sync at different RPM settings.  Try and get the "error" the same across the board.  This will give you the best overall performance.

Also, don't forget to point a fan at your engine cylinder head, as it's not healthy to run up the engine without adequate cooling.

And my compliments on your bench sync.  The engine started quickly, and seemed to have a good idle.
Luke M