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This is my ongoing problem...8K mile 73 V7 Sport, replaced or rebuilt everything around the engine. Fuel is flowing. Bike rides lovely for 30 minutes, then when nice and warm, begins to fail to fire on any more gas than idle. Motor gets flooded, bike stalls out. Switch ign off and on and fuel explodes in the headers. Not sure if this is still happening, but last summer when I was working on this, the gas was bubbling out of the carbs into the (then clear) fuel lines. Fuel overheat a real possiblity? Everything is arranged stock on the bike, double gaskets between manifolds and heads, fully restored standard Dellortos, etc. New everything in fuel system and electrical system. Just fitted electronic ignition, no improvement to this problem.Just checking if anyone has any new ideas... ???
I've never heard of vapor lock being a problem with a Guzzi.
Have to think of the bike as working perfectly - but only for a half an hour until it begins to stall out, then will only restart on idle (any throttle will kill the engine)
What do your spark plugs look like? Are they wet with gasoline? No? Easiest first. Open the gas cap next time and listen for a suction sound or just see if the bike runs. Could be clogged tank vent. Good luck,Tobit
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