Lambretta J50 Deluxe fuel flow problem fixes.
started having problems with the Lambretta J50 motor cutting
out, about 10 miles from home. This would
every time. I started checking the fuel level and carburetor
before my scooter rides. The fuel level
like Drawing 1
below. About 10 miles out, the motor started to cut out. I checked
fuel line. It look like Drawing
2 below. (no fuel in the line) I took the
fuel line off to see if it
blocked. The fuel flowed out with no problems???
the most part. I think its a vacuum problem cause by the
fuel tap and carburetor.
seen this, same type of problem happen on the LD's.
Drawing 3 below
I made a extra vent line that runs to the top of the fuel cap.
fixed the motor cutting out problem. I now ride the Lambretta
J50 Deluxe on long-distances rides,
the time with know problems.
air vent line needs to be above the fuel tank. I tied my vent
line to the gas cap and
little tubes in the tip of the line to keep dirt out.
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