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Topics - dbscots

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CB350/400 / Bike was running. Now won't start.
« on: June 20, 2015, 07:36:04 PM »
I'm having a problem with my '76 400f perhaps someone can shed a light on.  I had the bike running pretty well after installing a Dyna ignition.  Idling very nicely at 1100rpm.  The plugs were a little sooty however, so while I was doing some minor adjustments of the mixture, it died.  Now it will not start.  It doesn't sound like it even wants to start.  I have a tank full of fresh gas.  Good spark on all cylinders.  I'm using gl1000 coils.  I do have to charge the battery a bit to get it up to 12.5 volts but I've been doing that for a while and it always started before.  any ideas?
Thanks

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CB350/400 / 400F carb balancing
« on: August 17, 2012, 09:05:26 AM »
I hope there is someone out there who is good with carbs. because I'm having a problem that's driving me crazy.  I'm cleaning up a 1976 CB400F for my daughter. At this point everything's done. The carburetors were cleaned and rebuilt. I'm trying to balance them with a vacuum balancer that uses small balls to measure the amount of vacuum for each carb. Now in order to get the balls to drop into view I need to decrease the vacuum by turning the adjustment screw counterclockwise. Doing this raises the slide which in turn raises the idle. I was able to get all four balls dead even straight across. The only problem was that the bike was idling at about 4200rpm. So I turned the adjustment screws clockwise which increases the vacuum and lowers the slides. The idle comes down but the increased vacuum draws the balls upward and out of site in their tubes. No amount of fiddling on my part has been able to change this. Does anyone have any ideas that I can use to correct this problem?
Thanks in advance,
dbscots

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