I need something from 4mm to 6mm.
ZOOMER's fuel hose inner diameter is 4.5mm and KEIHINcarburetor's fuel hose fitting diameter is 6mm. 4mm to 5mm conversion joint is too tight to fit on the carburetor side. 5mm to 6mm conversion joint is too tight to fit on the carburetor side. The 5mm to 6mm one is too tight to install on the OEMHose of ZOOMER. I used 4mm to 5mm joint in the end, but it is still for the time being, so I may look for 4mm to 6mm joint in the future.
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