Gas Tank Pressure Build-Up
Gas Tank Pressure Build-UpI think there may be a problem with the gas tank cap on my CA78. After fueling with gas that is obviously cool and then letting the bike sit, pressure builds in the tank to a significant level. It gets high enough to force fuel past the carb float valve and cause the float bowl to overflow. I know the cap needs to vent inwards so fuel will flow to the carb but is this supposed to be a one way process or should it vent both ways? Has anyone else run into this same problem? Maybe the cap vent is not clear and I need to try and disassemble it if that is possible. Suggestions or ideas?
My money pit, so far;
1965 CA77 1966 A65 (yes a bezzer) 1971 SL100 1975 CB550 1976 CB360 1982 CR480R 2002 XR100
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