Question about Honda GB 500 Clubmann TT Motorcycles
You do not say which model you have . I think you are dealing with Kei Hin carburetors that have floating vacuum pistons ( not the rubber diaphragm style). In this style piston the aluminum piston floats in the carburetor top up and down about 3/4" or so. It is a once or twice a year tradition with this style carburetor (used on older GL1000, GL1100, and CX500's) to remove the top, pull out the piston, and clean both the inside of the carburetor top and the out side of the piston thoroughly with carburetor cleaner. This is so they do not stick or hang up during normal operation. When the carburetor top sticks on one or more of the cylinders it will cause a flat spot in the acceleration curve like the one you describe.
Posted on Nov 06, 2010
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Posted on Jan 02, 2017
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