Author Topic: leaky overflow on carbs  (Read 676 times)

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Offline Walt

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leaky overflow on carbs
« on: November 13, 2007, 03:42:18 PM »
I've got a few old hondas, 74 750, 77 400, 80 CM400T and have just resurrected the 750 and 400 from about 4 to 6 months of hibernation. Both have had the overflow on the some of the carbs leaking when I turn the gas on. I've let them sit longer and never had this problem, but am now having it with both bikes. I'll ride them a few miles and try again in a few days and the same thing. I've taken the bowls off and blown some canned air and cleaner in them, but it doesn't seem to work. Sometimes hitting the side of the problem carb with a pair of channel locks work though. I know I probably need to ride them more, I was just wondering if anyone has any tips on fixing this.

The 77 400 sat for about 6 years, but I completely stripped the carbs, dipped them in carb cleaner and replaced the floats and float valves and have had no problems with them. Maybe it's time for a dipping with the other ones.

Thanks,
Walt
1977 Honda CB400
2005 BMW R1200 GS

Offline 750goes

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Re: leaky overflow on carbs
« Reply #1 on: November 13, 2007, 04:37:20 PM »
remove the bowls - give the float valves a good clean will probably solve the problem....you may also need new needles if the float needles are damaged or worn... :)