After fitting a new scooter carburetor why does my engine run high then low then stop?

by Tony Robinson

After a problem with my old carburetor, I bought a new one from America. I've fitted the new one but now the bike struggles to start and when it does it goes into high revs then low then cuts out.

Is there any chance you can help me please? It's a Benelli k2 100cc scooter if that's any help.

Comments for After fitting a new scooter carburetor why does my engine run high then low then stop?

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Aug 16, 2015
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Aug 25, 2011
I've tried that...
by: tony

Hi. I've tried that; I pulled the fuel line off while it was still running and fuel squirted out, when I pulled the suction hose off the fuel stopped. So that seems OK...

Aug 25, 2011
Vacuum Leak
by: Jim Zeiser

Somewhere a vacuum line is disconnected or misplaced. Once you find it things should correct themselves.

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